arizona: 2002 - census.gov · 2a. trucks, truck miles, and average annual miles for all trucks:...

Arizona: 2002

2002 Economic Census

Vehicle Inventory and Use Survey

Geographic Area Series

Issued November 2004

EC02TV-AZ

U.S. Department of CommerceEconomics and Statistics Administration

U.S. CENSUS BUREAU

Many persons participated in the various activities of the 2002 Economic Census, Vehicle Inventory andUse Survey.

This report was prepared in the Service Sector Statistics Division under the direction of Thomas E.Zabelsky, Assistant Division Chief for Current Service and Transportation Programs. Planning,implementation, and compiling of this report were directed by John P. Miller, Chief, TransportationCharacteristics Branch, assisted by Joy P. Pierson, Donald F. Cheza, William J. Marshall, ErikaMcDonald, Vernetta N. Southerland, Kathleen R. Walsh and William C. Jones.

Sample design and statistical methodology were provided under the direction of Ruth E. Detlefsen,Assistant Division Chief for Research and Methodology. Sample design and estimation methods weredeveloped under the supervision of Jock Black, Chief, Program Research and Development Branch,assisted by William C. Davie Jr., M. Cristina Cruz, and Brett Moore. The imputation procedureswere developed under the supervision of Carol S. King, Chief, Statistical Methods Branch, assisted byJames N. Burton and Tameka Johnson.

Systems and procedures for mailout, quality control, and check-in operations were developed in theEconomic Planning and Coordination Division, Bernard J. Fitzpatrick, Assistant Division Chief forCollection Activities. Mailout and check-in procedures were developed under the supervision of SheilaProudfoot, Chief, Mailout and Data Capture Branch, assisted by Christopher Berbert, Betty McKay,and Bernadette Gray.

Systems and procedures for data entry and quality control were developed and implemented in theDecennial Systems and Contracts Management Office under the direction of Dennis Stoudt, AssistantDivision Chief for Processing Systems. The Data Conversion Systems Branch, Warren McKay, Chief, wasresponsible for the development and implementation of the automated tracking and image managementsystem. The Processing Coordination and Requirements Branch, Derrell Matthews, Chief, coordinatedthe technical requirements for the image system.

The processing system and computer programs were developed and implemented in the EconomicStatistical Methods and Programming Division, under the direction of Barry F. Sessamen, AssistantDivision Chief for Post Collection. Computer programming and implementation were provided bySteven G. McCraith, Chief, Census Related Surveys Branch, assisted by Barbara Love Lambert,Evelyn Cabrera, Preet Toor, and Eric M. Weiss.

The Systems Support Division provided the table composition system. Robert Joseph Brown, TableImage Processing System (TIPS) Senior Software Engineer, was responsible for the design anddevelopment of the TIPS, under the supervision of Robert J. Bateman, Assistant Division Chief,Information Systems.

Kim D. Ottenstein and Margaret A. Smith of the Administrative and Customer Services Division,Walter C. Odom, Chief, provided publications and printing management, graphics design andcomposition, and editorial review for print and electronic media. General direction and productionmanagement were provided by James R. Clark, Assistant Chief, and Susan L. Rappa, Chief,Publications Services Branch.

The staff of the National Processing Center, Judith N. Petty, Chief, performed mailout preparation andreceipt operations, clerical and analytical review activities, telephone operations, and data entry assistedby Carlene Bottorff, Karen S. Blessett, Sandra Hurst, and Debbie Woods.

Special acknowledgment is also due to the many respondents whose cooperation contributed to thepublication of these data.

Please direct inquiries concerning this report to John P. Miller, U.S. Census Bureau, 4700 Silver HillRoad, Mail Stop 6500, Washington, DC 20233-6500. Call 301-763-2797 or 301-457-2278 (fax).

ACKNOWLEDGMENTS

Arizona: 2002

2002 Economic Census


Geographic Area Series

Issued November 2004

EC02TV-AZ

U.S. Department of CommerceDonald L. Evans,

SecretaryTheodore W. Kassinger,

Deputy Secretary

Economics and Statistics AdministrationKathleen B. Cooper,

Under Secretary forEconomic Affairs

U.S. CENSUS BUREAUCharles Louis Kincannon,

Director

Vacant,Principal AssociateDirector for Programs

Frederick T. Knickerbocker,Associate Directorfor Economic Programs

Thomas L. Mesenbourg,Assistant Directorfor Economic Programs

Mark E. Wallace,Chief, Service SectorStatistics Division

ECONOMICS

AND STATISTICS

ADMINISTRATION

Economicsand StatisticsAdministration

Kathleen B. Cooper,Under Secretaryfor Economic Affairs

U.S. CENSUS BUREAU

Charles Louis Kincannon,Director

Hermann Habermann,Deputy Director andChief Operating Officer

CONTENTS

Vehicle Inventory and Use Survey 1��

Tables

1a. Trucks�Comparative Summary: 2002 and Earlier Years 11��

1b. Trucks�Comparative Summary for Trucks, Excluding Pickups,Minivans, Other Light Vans, and Sport Utilities: 2002 and1997 11��

2a. Trucks, Truck Miles, and Average Annual Miles for All Trucks:2002 and 1997 12��

2b. Trucks, Truck Miles, and Average Annual Miles for All Trucks�Measures of Sampling Variability: 2002 and 1997 18��

3a. Trucks, Truck Miles, and Average Annual Miles for Trucks,Excluding Pickups, Minivans, Other Light Vans, and SportUtilities: 2002 and 1997 24��

3b. Trucks, Truck Miles, and Average Annual Miles for Trucks,Excluding Pickups, Minivans, Other Light Vans, and SportUtilities�Measures of Sampling Variability: 2002 and 1997 30��

4. Trucks by Vehicle Size: 2002 36��

5. Trucks by Truck Type: 2002 41��

6. Truck Miles by Vehicle Size: 2002 46��

7. Truck Miles by Truck Type: 2002 51��

8. Truck Miles Distribution by Operational Characteristics: 2002 56��

Appendix

Approximating Unpublished Relative Standard Errors A–1��

Vehicle Inventory and Use Survey Contents iiiU.S. Census Bureau, 2002 Economic Census


The Vehicle Inventory and Use Survey (VIUS) provides data on the physical and operational charac-teristics of the nation’s truck population. This survey is conducted every 5 years as part of theeconomic census. Its primary goal is to produce national and state-level estimates of the totalnumber of trucks.

The 2002 VIUS is a probability sample of private and commercial trucks registered (or licensed) inthe United States as of July 1, 2002.1 A sample of about 136,000 trucks was surveyed to measurethe characteristics of nearly 89 million trucks registered in the United States. The VIUS excludesvehicles owned by federal, state, and local governments; ambulances; buses; motor homes; farmtractors; unpowered trailer units; and trucks reported to have been disposed of prior to January 1,2002.

Registration practices for commercial vehicles differ greatly among the states. Some states regis-ter a truck-tractor semitrailer combination as a single unit; others register the tractor and thesemitrailer separately. For either method of registration, only truck-tractors are included in theregistered truck counts. In addition, some states allow pickups, small vans, and sport utilityvehicles to be registered as either cars or trucks. Therefore, passenger car files were searched andany such vehicles were included in the sampling frame. Some vehicles, such as ‘‘off-highway’’trucks used exclusively on private property, are not required to be registered. These vehicles werenot included in the sampling frame and had no chance of being selected for the survey.

PURPOSE AND USE OF DATA

The economic census is the major source of facts about the structure and functioning of thenation’s economy. It provides the framework for such composite measures as the gross domesticproduct, input/output measures, production and price indexes, and other statistical series thatmeasure short-term changes in economic conditions.

VIUS data are of considerable value to government, business, academia, and the general public.Data on the number and types of vehicles and how they are used are important in studying thefuture growth of transportation and are needed in calculating fees and cost allocations amonghighway users. The data also are important in evaluating safety risks to highway travelers and inassessing the energy efficiency and environmental impact of the nation’s truck fleet. Businessesand others make use of these data in conducting market studies and evaluating market strategies;assessing the utility and cost of certain types of equipment; calculating the longevity of products;determining fuel demands; and linking to, and better utilizing, other data sets representing lim-ited segments of the truck population.

COMPARABILITY WITH PREVIOUS SURVEYS

The results of the 2002 VIUS are comparable, in most instances, to the results of the 1997 VIUSand prior Truck Inventory and Use Surveys (TIUS). Specific changes are as follows:

1Due to difficulty in obtaining up-to-date vehicle registration records for New Hampshire, the sample wasdrawn as of September 1, 2001, for this state.

Introduction 1Vehicle Inventory and Use Survey

U.S. Census Bureau, 2002 Economic Census

1. Business (formerly Major Use).

Changed—

• The kind of business was converted from a Standard Industrial Classification (SIC) basis toa North American Industry Classification System (NAICS) basis. Even though category head-ings may appear similar, differences in the classification systems should be taken intoaccount for comparability purposes.

2. Body Type.

New—

• Categories that were added are: armored; concrete pumper; curtainside; mobile hometoter; street sweeper; vacuum; and van, other.

Changed—

• The station wagon category was collapsed into the sport utility category.

• The grain body category was collapsed into the open top van category.

• The platform with added devices category was collapsed into the flatbed, stake, or plat-form category.

• The category ‘‘Winch or crane’’ was changed to ‘‘Crane’’ (winch was added as a category tothe equipment type section).

Deleted—

• The oilfield truck and yard tractor categories were dropped.

3. Primary Jurisdiction (formerly Base of Operation).

Changed—

• Estimates were previously calculated for the percentage of miles traveled outside the base-of-operation state. For 2002 estimates are calculated based on jurisdictions in which thevehicle traveled. Estimates of miles traveled in Canada, Mexico, and states other than thehome base state are also provided.

4. Months Operated (formerly Weeks Operated).

New—

• The ‘‘Vehicle not used’’ category was added.

Changed—

• Categories for time operated were changed from weekly intervals to monthly intervals.

5. Average Weight (Pounds).

Changed—

• The category ‘‘6,001 to 10,000’’ was split into ‘‘6,001 to 8,500’’ and ‘‘8,501 to 10,000.’’

6. Total Length (Feet).

New—

• Categories representing lengths of 45 feet up to 80 feet or more were added.

7. Vehicle Acquisition.

Deleted—

• The categories ‘‘Leased from someone else’’ and ‘‘Other’’ were dropped.

2 Introduction Vehicle Inventory and Use Survey


8. Lease Characteristics.

New—

• Categories for the length of the leasing agreement were added.

• The category ‘‘Fuel contract’’ was added to the provisions of lease section.

Changed—

• The leased section includes a breakout between lessee and lessor.

• The categories ‘‘Leased with driver other than owner-operator’’ and ‘‘Leased with owner-operator’’ were collapsed into the category ‘‘Vehicle with driver.’’

Deleted—

• The categories ‘‘Maintenance on specific parts’’ and ‘‘Other’’ were dropped from the provi-sions of lease section.

9. Primary Operator Classification.

New—

• A section for source of hauls was added.

Changed—

• There is limited comparability for this section due to significant changes in the categoriesand definitions.

Deleted—

• The section ‘‘For-hire jurisdiction’’ was dropped.

• The category ‘‘Exempt’’ was dropped from the type of carrier section.

10. Hazardous Materials Carried.

Deleted—

• All detailed hazardous material data lines were dropped except in Table 8 where distrib-uted mileage appears.

11. Equipment Type.

New—

• Categories added to the equipment type section are: aerial work platform/bucket, air com-pressor, air springs, collision warning system, computerized drive train control unit, crane,hoist, idle-reducing technology, internet access, lift gate, mounting bar for snowplow,power take-off, toolbox, and winch.

• A section for transmission type was added.

Changed—

• The trip recorder or on-board computer category was broken out into categories distin-guishing with or without communication capabilities.

• Categories for radial tires and road speed governor were moved from the fuel conservationequipment section to the equipment type section.

• The front-wheel drive category was moved from the driving wheels section to the equip-ment type section.

Deleted—

• Categories for power steering and electronic vehicle management system were dropped.



12. Fuel Type and Engine Size (formerly Engine Type and Size).

New—

• Respondents were permitted to report fuel combinations if used most often during theyear.

Changed—

• The ‘‘Liquefied gas or other’’ category has been broken out into categories for natural gas,propane, alcohol fuels, electricity, and combination.

13. Refueling Location.

Changed—

• Response categories were changed significantly. No comparable 1997 data are available forthis section.

14. Maintenance.

Deleted—

• The category for component distributorship was dropped from the general maintenancesection.

15. Truck Type and Axle Arrangement.

New—

• The category ‘‘4 axles or more’’ for single-unit trucks and truck tractors without trailer wasbroken out into ‘‘4 axles’’ and ‘‘5 axles or more.’’

• Sections for total liftable axles and locations and total liftable axles and number of brakingaxles were added.

Changed—

• A truck-tractor, if not in operation, was grouped with the single-unit trucks.

• The subgroupings for single-unit truck with trailer and single-unit truck with utility trailerwere combined.

• The category ‘‘7 axles or more’’ for truck-tractors with double trailers was broken out into‘‘7 axles’’ and ‘‘8 axles or more.’’

• The category ‘‘8 axles or more’’ for truck-tractors with triple trailers was broken out into ‘‘8axles,’’ ‘‘9 axles,’’ and ‘‘10 axles or more.’’

Deleted—

• The category for trailer not specified was dropped.

16. Cab Type.

New—

• Categories for conventional cab or cab over engine with or without a sleeper were added.

Deleted—

• The category ‘‘Other’’ was dropped.

17. Additional Changes.

Not applicable. This category was added to some sections to make the detail lines add tototal.



Primary products carried. Truck count detail lines for products carried were dropped fromall tables. Distributed mileage for products carried appears in Table 8. Product mileage doesnot sum to 100 percent because multiple products may be carried at the same time. Productscarried, which somewhat followed the SIC system, are now based on the Standard Classifica-tion of Transported Goods (SCTG).

Truck fleet size. This section was dropped from all tables.

Fuel conservation equipment. This section was dropped from all tables.

The driving wheels section for pickups, panels, vans, sport utilities and station wagons(4-wheel drive and 2-wheel drive) was dropped.

Table layout. The table layout for the 2002 state publication has changed significantly fromthe table layout used for the 1997 state publication. Some of the changes include:

1. Table 2 is broken out into Tables 2a (trucks, truck miles, and average annual miles for alltrucks), 3a (trucks, truck miles, and average annual miles for trucks, excluding pickups,minivans, other light vans, and sport utilities), 2b (measures of sampling variability forTable 2a), and 3b (measures of sampling variability for Table 3a).

2. Tables 4, 5, 6, 7, and 8 are new:

a. Table 4 contains estimates of the number of trucks by vehicle size.

b. Table 5 contains estimates of the number of trucks by truck type.

c. Table 6 contains estimates of the number of miles traveled by vehicle size.

d. Table 7 provides estimates of the number of miles traveled by truck type.

e. Table 8 shows estimates of the number of truck miles distribution by operational char-acteristics.

EXPLANATION OF TERMS

Business. This item is based on the business or the part of the business in which the vehiclewas used. The 15 specific business use categories are self-explanatory and are roughly based onNAICS sectors. Responses in the ‘‘Other’’ category were recoded, if possible, to one of the 15 spe-cific business categories.

Body type. This item describes the type of body that is permanently attached to the power unit(i.e., straight or single-unit truck). For truck-tractors, the body type is defined as the type of trailermost often pulled.

Minivans. This body type category includes minivans that are manufactured on either a truck orpassenger car chassis.

Annual miles. This item represents the annual miles traveled. When a respondent had partial-year ownership of the vehicle, annual miles were adjusted to reflect miles traveled when notowned by the respondent.

Vehicle size. This item is determined by the average vehicle weight (empty vehicle weight pluscargo weight) during 2002. The four size classes are:

1. Light. The average vehicle weight is 10,000 pounds or less.

2. Medium. The average vehicle weight is 10,001 to 19,500 pounds.

3. Light-heavy. The average vehicle weight is 19,501 to 26,000 pounds.

4. Heavy-heavy. The average vehicle weight is 26,001 pounds or more.



Primary operator classification. This item is defined as follows:

1. Personal transportation. This is a vehicle operated for personal use, such as travel towork, carpooling, pleasure driving, etc.

2. Rental. This is a vehicle operated for daily or short-term rental.

3. Private. This is a vehicle operated to carry goods owned by the respondent, or for internalcompany business.

4. Motor carrier. This is a vehicle operated by a company and hired to carry other people’sgoods.

5. Owner operator. This is a vehicle operated by an independent trucker hired to carry otherpeople’s goods.

Hazardous materials. This item identifies those trucks that transport hazardous materials inquantities large enough to have a placard on the vehicle required by 49 CFR Part 172 Subpart F.

Truck miles distribution. Table 8 shows the distribution of annual miles by the actual percent-age of use for selected activities of each truck. Mileage estimates presented in all other tables ofthis report represent 100 percent of the individual truck’s mileage based on primary activity,regardless of any secondary operational activities.

SAMPLE DESIGN

The sampling frame was constructed from files of truck registrations identified as being active asof July 1, 2002.2 The frame was stratified by geography and truck characteristics. The 50 statesand the District of Columbia made up the 51 geographic strata. Body type and gross vehicleweight (GVW) determined the following five truck strata: 1) pickups; 2) minivans, other light vans,and sport utilities; 3) light single-unit trucks (GVW < 26,000 lb); 4) heavy single-unit trucks(GVW ≥ 26,000 lb; and 5) truck-tractors. Therefore, the sampling frame was partitioned into 255geographic-by-truck strata. Within each stratum, a simple random sample of truck registrationswas selected without replacement. This produced a total sample of approximately 136,000 truckregistrations.

The sample size for Arizona is 2,713 truck registrations.

Estimation

An estimate of the number of trucks for a particular state and truck characteristic was computedin the following manner. Weighted estimates of the number of trucks having the characteristic ofinterest were computed for each of the five truck strata. The weight for a given truck was theproduct of two factors—the reciprocal of the truck’s probability of selection and a nonresponseadjustment factor. (See the Nonsampling Error section for a description of the nonresponseadjustment procedure.) The truck stratum estimates were summed to form a state-level estimate.Two types of truck miles estimates are provided. Distributed truck miles estimates, as shown inTable 8, were computed by apportioning each truck’s annual miles into the appropriate categorybased on the percent of miles driven in the category as reported by the respondent. Truck milesestimates presented in all other tables were computed by attributing 100 percent of an individualtruck’s annual miles to the category with the greatest reported percentage. For example, say aparticular truck was driven 50,000 miles in the survey year and the respondent indicated 80 per-cent of the trips were between 201 and 500 miles from the home base, while 20 percent of thetrips were between 101 and 200 miles from the home base. In Table 8, 40,000 miles would betabulated in the ’’201 to 500 miles’’ category and 10,000 miles would be tabulated in the ‘‘101 to200 miles’’ category. In all other tables, 50,000 miles would be tabulated in the ‘‘201 to 500miles’’ category. To compute an estimate of the average miles per truck, the total miles estimatewas divided by the number of trucks estimate for the characteristic of interest.

2The sampling frame included trucks registered as of September 1, 2001, for New Hampshire.



DATA COLLECTION

A questionnaire was mailed to the registered owner of each selected truck registration. This regis-trant was requested to provide data about the truck identified by the vehicle registration informa-tion imprinted on the questionnaire. The information provided by each respondent was subjectedto extensive computer edits. Questionable responses were reviewed and corrected when neces-sary.

RELIABILITY OF THE ESTIMATES

The total error of an estimate based on a sample survey is the difference between the estimateand the population parameter that it estimates. This error may be considered to be comprised ofsampling error and nonsampling error. Sampling error is the difference between the estimate andthe result that would be obtained from a complete enumeration of the sampling frame conductedunder the same survey conditions. This error occurs because characteristics differ among sam-pling units and because only a subset of the entire population is measured in a sample survey.Nonsampling error encompasses all other factors that contribute to the total error of a sample sur-vey estimate. The accuracy of a survey result may be affected by these two types of errors.

Sampling and nonsampling errors are often measured by the quantities, bias and variance. Thebias of an estimator of a population parameter is the difference, averaged over all possiblesamples of the same size and design, between the estimator and the population parameter beingestimated. (The population parameter is usually unknown.) Any systematic error, or inaccuracythat affects all samples of a specified design in a similar way, may bias the resulting estimates.The variance of an estimator is the squared difference, averaged over all possible samples of thesame size and design, between the estimator and its average value.

Measures of Sampling Variability

Because the estimates are based on a sample, exact agreement with the results that would beobtained from a complete enumeration of the truck registrations on the sampling frame is notexpected. However, because each truck included on the sampling frame has a known probabilityof being selected into the sample, it is possible to estimate the sampling variability of the surveyestimates.

The particular sample used in this survey is one of a large number of samples of the same sizethat could have been selected using the same design. If all possible samples had been surveyedunder the same conditions, an estimate of the population parameter of interest could have beenobtained from each sample. These samples give rise to a distribution of estimates for the popula-tion parameter. A statistical measure of the variability among these estimates is the standarderror, which can be approximated from any one sample. The standard error is defined as thesquare root of the variance. The coefficient of variation (or relative standard error) of an estimatoris the standard error of the estimator divided by the estimator. Note that measures of samplingvariability, such as the standard error and coefficient of variation, are estimated from the sampleand are also subject to sampling variability. (Technically, we should refer to the estimated stan-dard error or the estimated coefficient of variation of an estimator. However, for the sake of brev-ity, we have omitted this detail.) It is important to note that the standard error and coefficient ofvariation only measure sampling variability. They do not measure any systematic biases in theestimates. The U.S. Census Bureau recommends that individuals using estimates contained in thisreport incorporate this information into their analyses, as sampling error could affect the conclu-sions drawn from these estimates.

An estimate from a particular sample and the standard error associated with the estimate can beused to construct a confidence interval. A confidence interval is a range about a given estimatorthat has a specified probability of containing the result of a complete enumeration of the samplingframe conducted under the same survey conditions. Associated with each interval is a percentageof confidence, which is interpreted as follows. If, for each possible sample, an estimate of a popu-lation parameter and its approximate standard error were obtained, then:



1. For approximately 90 percent of the possible samples, the interval from 1.645 standard errorsbelow to 1.645 standard errors above the estimate would include the population parameter asobtained from a complete enumeration of the sampling frame conducted under the same sur-vey conditions.

2. For approximately 95 percent of the possible samples, the interval from 1.96 standard errorsbelow to 1.96 standard errors above the estimate would include the population parameter asobtained from a complete enumeration of the sampling frame conducted under the same sur-vey conditions.

To illustrate the computation of a confidence interval for an estimate of the number of trucks,assume that an estimate of trucks is 3,377.8 thousand and the coefficient of variation for this esti-mate is 2.9 percent, or 0.029. First obtain the standard error of the estimate by multiplying thenumber of trucks estimate by its coefficient of variation. For this example, multiply 3,377.8 thou-sand by 0.029. This yields a standard error of 97.9562 thousand. The upper and lower bounds ofthe 90-percent confidence interval are computed as 3,377.8 thousand plus or minus 1.645 times97.9562 thousand. Consequently, the 90-percent confidence interval is 3,216.7 thousand to3,538.9 thousand. If corresponding confidence intervals were constructed for all possible samplesof the same size and design, approximately 9 out of 10 (90 percent) of these intervals would con-tain the result obtained from a complete enumeration of all trucks on the sampling frame.

Nonsampling Error

Nonsampling error encompasses all other factors that contribute to the total error of a sample sur-vey estimate and may also occur in censuses. It is often helpful to think of nonsampling error asarising from deficiencies or mistakes at some point in the survey process. Nonsampling error canbe attributed to many sources: (1) inability to obtain information about all trucks in the sample,(2) response errors, (3) differences in the interpretation of the questions, (4) mistakes in coding orkeying the data obtained, and (5) other errors of collection, response, coverage, and processing.Although no direct measurement of the potential biases due to nonsampling error has beenobtained, precautionary steps were taken in all phases of the collection, processing, and tabula-tion of the data in an effort to minimize its influence.

A potential source of bias in the estimates is nonresponse. Nonresponse is defined as the failureto obtain all the intended measurements or responses about all the trucks in the sample. Twotypes of nonresponse are often distinguished. Unit nonresponse is used to describe the failure toobtain any of the substantive measurements about a sampled truck. In most cases of unit nonre-sponse, the questionnaire was never returned to the Census Bureau after several attempts to elicita response. For Arizona, approximately 78.6 percent of the questionnaires were returned withsubstantive data. Item nonresponse occurs either when a question is unanswered or the responseto the question fails computer or analyst edits. The procedures used to account for unit and itemnonresponse are discussed below.

Unit nonresponse is handled in the estimation procedure by reweighting. To apply this method ofnonresponse adjustment, we make the assumption that the population of trucks can be dividedinto a finite number of mutually exclusive adjustment cells so that within each cell, all the popula-tion elements possess similar characteristics and share a similar probability of responding, ifselected into the sample. The adjustment cells for the 2002 VIUS are identical to the samplingstrata. A nonresponse adjustment factor is computed for each adjustment cell and is equal to theratio of the number of truck registrations selected into the sample to the number of responsesreceived within each cell. In this sense, reweighting allocates characteristics to the nonrespon-dents in proportion to the characteristics observed for the respondents within each adjustmentcell. The amount of bias introduced by this nonresponse adjustment procedure depends on theextent to which the nonrespondents differ, characteristically, from the respondents in each adjust-ment cell.

For item nonresponse, a missing value is replaced by a predicted value obtained from an appropri-ate model for nonresponse. This procedure is called imputation. To impute annual miles and life-time miles, we divide the sample into a finite number of mutually exclusive cells based on state of



registration, and related vehicle characteristics. For each cell, estimates of average annual milesand average lifetime miles are computed based on those trucks in the cell for which annual milesand lifetime miles have been reported. Missing values are then replaced with the appropriate aver-age values. A slightly different imputation procedure is used to impute length and average weight(empty weight plus cargo weight). For these data items, we replace a missing value with datafrom a truck with similar characteristics for which length and average weight have been reported.

For all other data items, no imputation is performed. Instead, separate estimates are published ina ‘‘Not reported’’ category. For example, a respondent who did not indicate the type of business inwhich his/her truck was used would be included in the estimate for the ‘‘Not reported’’ category.Users of the estimates should exercise caution when allocating the estimate for the ‘‘Not reported’’category to the estimates for the reported categories in the proportions observed for the reportedcategories. This is because the characteristics of the trucks for which we obtained informationmay differ significantly from those trucks for which we obtained no information.

Unpublished Estimates

Additional statistics not shown in the tables are obtainable by tabulating records on a CD-ROMcontaining the survey microdata. These additional estimates have not been included in this publi-cation because of high sampling variability, poor response, or other factors that may make thempotentially misleading. It should be noted that some unpublished estimates can be deriveddirectly from this report by subtracting published estimates from their respective totals. However,the estimates obtained by such subtraction would be subject to the poor response rates or highsampling variability as previously described.

Individuals who use estimates in this report, or the CD-ROM microdata, to create estimates notpublished by the Census Bureau should cite the Census Bureau as the source of only the publishedestimates or the microdata used, and not as the source of the new estimates.

CONFIDENTIALITY AND DISCLOSURE

Title 13 of the United States Code authorizes the Census Bureau to conduct censuses and surveys.Section 9 of the same Title requires that any information collected from the public under theauthority of Title 13 be maintained as confidential. Section 214 of Title 13 and Sections 3559 and3571 of Title 18 of the United States Code provide for the imposition of penalties of up to fiveyears in prison and up to $250,000 in fines for wrongful disclosure of confidential census infor-mation. In accordance with Title 13, no estimates are published that would disclose the opera-tions of an individual firm.

The Census Bureau’s internal Disclosure Review Board sets the confidentiality rules for all datareleases. A checklist approach is used to ensure that all potential risks to the confidentiality of thedata are considered and addressed.

A disclosure of data occurs when an individual can use published statistical information to iden-tify either an individual or firm that has provided information under a pledge of confidentiality.Disclosure limitation is the process used to protect the confidentiality of the survey data providedby an individual or firm. Using disclosure limitation procedures, the Census Bureau modifies orremoves the characteristics that put confidential information at risk for disclosure. Although itmay appear that a table shows information about a specific individual or business, the CensusBureau has taken steps to disguise or suppress the original data while making sure the results arestill useful. The techniques used by the Census Bureau to protect confidentiality in tabulationsvary, depending on the type of data.

SYMBOLS

The following symbols are used in this publication:

N Not available.S Estimate does not meet publication standards because of high sampling variability or

poor response quality.V Represents an estimate of less than 50 vehicles, 50,000 miles, or 0.05 percent.



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Table 1a. Trucks�Comparative Summary: 2002 and Earlier Years[Estimates are shown as percents and are based on data from the 2002 and 1997 Vehicle Inventory and Use Surveys, and the 1992 and 1987 Truck Inventory and Use Surveys. Because of rounding,estimates may not be additive]

Vehicular and operational characteristics 2002 1997 1992 1987

Total 100.0�� 100.0 100.0 100.0

BUSINESS1

Agriculture, forestry, fishing, or hunting .2�� 2.3 2.3 1.9Mining .1�� S .2 .4Construction 5.6�� 10.8 8.7 8.4Manufacturing 1.5�� S 1.0 .8Wholesale and retail trade 2.8�� 4.7 5.1 5.9

For�hire transportation or warehousing 1.6�� .9 .5 .9Utilities and all services 6.8�� 5.6 6.1 3.6Personal transportation 71.1�� 72.6 74.7 77.2Other, not reported, and not applicable 10.4�� 2.5 1.4 .8

BODY TYPEPickup, minivan, other light vans, and sport utility 91.8�� 94.9 95.1 93.4Flatbed, stake, platform, and low boy 1.0�� 1.4 1.7 2.4Van2 5.3�� 1.4 1.0 .9Service, utility .3�� .1 .2 .1Van, step, walk�in, or multistop .2�� .6 .3 1.3

Dump .5�� .5 .6 .6Tank for liquids, gases, or dry bulk .3�� .2 .3 .3Other and not applicable .7�� .9 .9 1.0

VEHICLE SIZELight 92.3�� 95.8 96.3 95.8Medium 4.6�� 1.5 1.5 1.6Light�heavy 1.1�� .7 .7 .7Heavy�heavy 2.1�� 2.0 1.5 1.9

ANNUAL MILESLess than 5,0003 16.0�� 16.0 20.0 20.45,000 to 9,999 20.9�� 17.0 18.5 22.710,000 to 19,999 46.5�� 44.2 40.7 41.820,000 to 29,999 10.6�� 14.5 13.7 9.730,000 or more 5.9�� 8.3 7.1 5.3

Vehicular and operational characteristics 2002 1997 1992 1987

MODEL YEAR

1 to 2 years old 16.7�� 14.2 14.8 15.83 to 4 years old 18.9�� 18.2 13.0 15.5Over 4 years old 64.4�� 67.6 72.1 68.6

VEHICLE ACQUISITION

New 46.0�� 39.5 43.9 44.3Used 48.4�� 52.5 53.1 54.3Not reported4 5.6�� 8.0 3.0 1.4

TRUCK TYPE

Single�unit trucks5 97.1�� 97.6 96.2 98.22 axles 96.6�� 97.2 95.7 97.73 axles or more .4�� .4 .4 .5Trailer/axles not specified V�� N N N

Combinations 2.9�� 2.4 3.8 1.83 axles .3�� .7 .4 .54 axles 1.3�� .7 2.7 .65 axles or more 1.1�� 1.0 .7 .8Trailer/axles not specified .1�� V V V

RANGE OF OPERATION

50 miles or less 60.2�� 73.7 74.5 76.251 to 200 miles 15.8�� 16.2 15.1 14.2201 miles or more 4.9�� 5.9 6.0 5.0Off�the�road, not reported, and not applicable 19.2�� 4.3 4.5 4.6

FUEL TYPE

Gasoline 87.7�� 93.7 96.3 96.5All other fuels 8.8�� 6.2 3.6 3.4Other, not reported, and not applicable 3.5�� .2 .1 .1

N Not available. S Estimate does not meet publication standards because of high sampling variability or poor response quality. V Represents an estimate of less than 50 vehicles, 50,000miles, or 0.05 percent.

1Comparability of estimates may vary across survey years due to changes in category definitions.2Includes open top trailers and all van except step, walk�in, or multistop.3Includes vehicles not in use.4For survey years prior to 2002, this includes vehicles leased from someone else.5Excludes truck�tractors not in use.

Note: The Introduction gives information on confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found atwww.census.gov/svsd/www/02vehinv.html.

Table 1b. Trucks�Comparative Summary for Trucks, Excluding Pickups, Minivans, Other LightVans, and Sport Utilities: 2002 and 1997

[Estimates are shown as percents and are based on data from the 2002 and 1997 Vehicle Inventory and Use Surveys. Because of rounding, estimates may not be additive]

Vehicular and operational characteristics 2002 1997

Total 100.0�� 100.0

BUSINESS1

Agriculture, forestry, fishing, or hunting 1.9�� 4.8Mining .6�� 2.4Construction 12.6�� 29.3Manufacturing 1.9�� 3.4Wholesale and retail trade 7.3�� 17.5

For�hire transportation or warehousing 8.7�� 14.8Utilities and all services 7.5�� 14.6Personal transportation V�� 3.7Other, not reported, and not applicable 59.4�� 9.6

BODY TYPEFlatbed, stake, platform, and low boy 12.0�� 26.4Van2 65.2�� 27.1Service, utility 3.3�� 2.0Van, step, walk�in, or multistop 2.5�� 11.2Dump 5.6�� 10.2Tank for liquids, gases, or dry bulk 3.3�� 4.7Other and not applicable 8.1�� 18.4

VEHICLE SIZELight 11.1�� 27.1Medium 53.1�� 20.3Light�heavy 12.9�� 13.5Heavy�heavy 22.9�� 39.0

ANNUAL MILESLess than 5,0003 15.4�� 16.15,000 to 9,999 24.9�� 11.910,000 to 19,999 31.6�� 26.720,000 to 29,999 13.0�� 15.230,000 or more 15.2�� 30.2

Vehicular and operational characteristics 2002 1997

MODEL YEAR1 to 2 years old 7.5�� 15.93 to 4 years old 12.7�� 13.7Over 4 years old 79.8�� 70.4

VEHICLE ACQUISITIONNew 73.0�� 43.6Used 23.6�� 43.1Not reported4 3.4�� 13.3

TRUCK TYPESingle�unit trucks5 83.9�� 69.8

2 axles 78.5�� 61.13 axles or more 5.4�� 8.7Trailer/axles not specified .1�� N

Combinations 16.1�� 30.23 axles 1.2�� 3.24 axles 2.2�� 6.75 axles or more 11.1�� 20.3Trailer/axles not specified 1.5�� V

RANGE OF OPERATION50 miles or less 37.6�� 48.751 to 200 miles 23.8�� 26.6201 miles or more 26.7�� 16.9Off�the�road, not reported, and not applicable 11.9�� 7.7

FUEL TYPEGasoline 32.3�� 35.5All other fuels 63.5�� 61.3Other, not reported, and not applicable 4.3�� 3.3


1Comparability of estimates may vary across survey years due to changes in category definitions.2Includes open top trailers and all van except step, walk�in, or multistop.3Includes vehicles not in use.4For survey years prior to 2002, this includes vehicles leased from someone else.5Excludes truck�tractors not in use.

Note: The Introduction gives information on confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found atwww.census.gov/svsd/www/02vehinv.html.

Vehicle Inventory and Use Survey Arizona 11U.S. Census Bureau, 2002 Economic Census

Table 2a. Trucks, Truck Miles, and Average Annual Miles for All Trucks: 2002 and 1997[Estimates are based on data from the 2002 and 1997 Vehicle Inventory and Use Surveys. Because of rounding, estimates may not be additive]

Vehicular and operational characteristics 2002 trucks(thousands)

1997 trucks(thousands)

Percentchange

2002 truckmiles

(millions)

1997 truckmiles

(millions)Percentchange

2002 averagemiles per

truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

Total 1 500.1�� 1 390.0 7.9 20 204.8 19 946.3 1.3 13.5 14.3 –6.1

BUSINESS1

For�hire transportation or warehousing 24.4�� 13.0 87.7 1 358.3 781.3 73.9 55.7 60.2 –7.4Vehicle leasing or rental 85.5�� 16.3 425.0 1 163.1 428.6 171.3 13.6 26.3 –48.3Agriculture, forestry, fishing, or hunting 2.3�� 31.5 –92.7 49.4 583.0 –91.5 21.6 18.5 16.6Mining .8�� S S 14.0 50.4 –72.3 17.8 S SUtilities 23.5�� 10.2 131.8 573.2 S S 24.3 S S

Construction 83.3�� 149.9 –44.5 1 531.7 2 887.4 –47.0 18.4 19.3 –4.5Manufacturing 22.6�� S S S 85.5 S S S SWholesale trade 10.6�� 32.0 –66.9 202.4 832.9 –75.7 19.1 26.0 –26.6Retail trade 31.6�� 34.0 –6.9 582.4 617.9 –5.7 18.4 18.2 1.2Information services S�� N N S N N S N N

Waste management, landscaping, oradministrative/support services 9.4�� N N 178.3 N N 19.0 N N

Arts, entertainment, or recreation services .8�� N N 8.2 N N 9.7 N NAccommodation or food services S�� N N S N N S N NOther services 54.1�� N N 967.4 N N 17.9 N NPersonal transportation 1 066.6�� 1 008.9 5.7 12 226.1 12 218.1 .1 11.5 12.1 –5.3Not reported 18.2�� V N 433.0 V N 23.7 V NNot applicable2 52.3�� 18.4 184.5 S S S S S S

BODY TYPE

Single�unit trucks 1 482.5�� 1 373.9 7.9 19 042.0 18 788.8 1.3 12.8 13.7 –6.1Pickup 740.6�� 784.8 –5.6 9 316.9 11 242.8 –17.1 12.6 14.3 –12.2Minivan 171.3�� 96.1 78.3 2 375.8 1 251.2 89.9 13.9 13.0 6.5Other light vans 90.5�� 104.7 –13.6 1 082.2 1 109.0 –2.4 12.0 10.6 12.9Sport utility 374.9�� 333.2 12.5 4 880.2 4 219.6 15.7 13.0 12.7 2.8Armored V�� N N V N N V N N

Beverage .7�� .7 –9.7 S 7.9 S S 10.9 SConcrete mixer 1.6�� 1.9 –11.7 36.9 45.8 –19.4 22.5 24.7 –8.8Concrete pumper .2�� N N S N N S N NCrane S�� 1.0 S S 11.0 S S 10.7 SCurtainside S�� N N V N N S N N

Dump 4.9�� 5.7 –14.4 73.1 85.8 –14.8 15.0 15.1 –.4Flatbed, stake, or platform 12.1�� 15.9 –23.6 156.5 211.8 –26.1 12.9 13.3 –3.2Low boy V�� .4 N V 9.7 N V 24.0 NPole, logging, pulpwood, or pipe V�� .1 N V S S V S SService, utility 4.0�� 1.4 186.6 56.7 S S 14.1 S S

Service, other 2.9�� 5.0 –41.0 43.6 85.4 –48.9 14.9 17.2 –13.4Street sweeper S�� N N S N N S N NTank, dry bulk .1�� V N S V S S V STank, liquids or gases 2.9�� 2.3 28.3 31.2 34.7 –10.2 10.7 15.3 –30.0Tow/Wrecker 1.2�� 1.6 –27.6 17.8 41.4 –57.0 15.0 25.3 –40.7

Trash, garbage, or recycling 1.3�� 1.0 24.1 26.0 30.4 –14.4 20.1 29.2 –31.0Vacuum S�� N N S N N S N NVan, basic enclosed 67.2�� 7.2 838.4 837.9 175.8 376.5 12.5 24.6 –49.2Van, insulated nonrefrigerated S�� S S S S S S S SVan, insulated refrigerated 1.4�� 1.1 24.7 31.0 32.6 –5.1 22.5 29.6 –23.9

Van, open top S�� S S S S S S S SVan, step, walk�in, or multistop 3.1�� 8.0 –61.0 46.8 133.3 –64.9 15.0 16.6 –9.9Van, other .6�� N N S N N S N NOther V�� N N V N N V N N

Truck�tractors 17.5�� 16.1 9.0 1 162.8 1 157.5 .5 66.3 71.9 –7.8Automobile carrier .2�� .1 51.8 S S S S S SBeverage .4�� .3 41.1 4.9 3.1 56.6 11.0 9.9 11.0Curtainside V�� N N V N N V N NDump 2.0�� 1.6 25.6 95.1 74.9 26.9 48.6 48.1 1.1Flatbed, stake, or platform 2.3�� 1.7 34.6 99.7 98.0 1.7 42.7 56.5 –24.5

Livestock S�� S S S S S S S SLow boy .3�� .6 –53.9 20.1 31.4 –36.0 70.9 51.0 38.9Mobile home toter S�� N N S N N S N NOpen top .2�� .1 112.5 8.2 S S 37.2 S SPole, logging, pulpwood, or pipe V�� S S V S S V S S

Tank, dry bulk .5�� .4 29.7 36.0 28.9 24.3 76.3 79.6 –4.2Tank, liquids or gases .6�� .7 –19.0 39.8 50.3 –20.8 70.1 71.7 –2.2Van, basic enclosed 8.5�� 8.0 6.7 720.8 669.8 7.6 84.9 84.2 .9Van, drop�frame .2�� .2 –32.5 S 8.5 S S 36.5 SVan, insulated nonrefrigerated S�� V S S V S S V S

Van, insulated refrigerated 1.5�� 2.1 –28.0 111.4 176.3 –36.8 73.6 83.9 –12.2Other S�� N N S N N S N NNot applicable3 .7�� N N V N N V N N

ANNUAL MILES

Less than 5,000 188.4�� 208.9 –9.8 377.5 435.9 –13.4 2.0 2.1 –4.05,000 to 9,999 313.0�� 236.7 32.2 2 369.2 1 672.7 41.6 7.6 7.1 7.110,000 to 19,999 697.9�� 614.6 13.6 9 281.4 8 146.2 13.9 13.3 13.3 .320,000 to 29,999 159.7�� 201.4 –20.7 3 631.2 4 520.8 –19.7 22.7 22.4 1.330,000 to 49,999 56.1�� 89.7 –37.5 1 934.8 3 011.4 –35.8 34.5 33.6 2.8

50,000 to 74,999 17.3�� 11.8 47.4 955.0 713.3 33.9 55.1 60.6 –9.175,000 or more 15.4�� 13.6 13.3 1 525.4 1 446.0 5.5 98.9 106.2 –6.9Not applicable2 52.3�� 13.5 288.3 S V S S V S

See footnotes at end of table.

12 Arizona Vehicle Inventory and Use SurveyU.S. Census Bureau, 2002 Economic Census

Table 2a. Trucks, Truck Miles, and Average Annual Miles for All Trucks: 2002 and 1997�Con.[Estimates are based on data from the 2002 and 1997 Vehicle Inventory and Use Surveys. Because of rounding, estimates may not be additive]



Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

PRIMARY RANGE OF OPERATION

Off�the�road 28.9�� 46.3 –37.6 239.9 683.1 –64.9 8.3 14.8 –43.750 miles or less 902.7�� 1 023.9 –11.8 11 662.4 12 892.4 –9.5 12.9 12.6 2.651 to 100 miles 177.0�� 159.1 11.2 2 603.9 3 110.2 –16.3 14.7 19.5 –24.7101 to 200 miles 59.2�� 65.7 –9.9 1 095.0 1 383.1 –20.8 18.5 21.0 –12.2201 to 500 miles 24.8�� 39.9 –38.0 623.1 1 264.2 –50.7 25.2 31.7 –20.5

501 miles or more 48.2�� 41.6 15.8 1 416.3 613.2 130.9 29.4 14.8 99.4Not reported 207.0�� 13.5 1 435.6 2 433.9 V N 11.8 V NNot applicable2 52.3�� N N S N N S N N

PRIMARY JURISDICTION

Operated in Canada .8�� N N 9.5 N N 12.1 N NOperated in Mexico S�� N N S N N S N NOperated within the home base state 1 193.5�� N N 16 283.7 N N 13.6 N NOperated in states other than the home basestate 71.9�� N N 1 809.3 N N 25.2 N N

Not reported 174.7�� N N 1 857.8 N N 10.6 N NNot applicable2 52.3�� N N S N N S N N

MONTHS OPERATED

12 1 009.6�� N N 14 619.6 N N 14.5 N N7 to 11 247.3�� N N 3 621.4 N N 14.6 N N2 to 6 158.3�� N N 1 727.7 N N 10.9 N N1 or less 32.6�� N N 105.8 N N 3.3 N NVehicle not used 52.3�� N N S N N S N N

VEHICLE SIZE

Light 1 383.9�� 1 331.1 4.0 17 508.4 17 921.8 –2.3 12.7 13.5 –6.0Medium 68.8�� 21.5 220.4 1 061.7 405.5 161.8 15.4 18.9 –18.3Light�heavy 15.8�� 9.6 64.5 254.6 204.0 24.8 16.1 21.2 –24.1Heavy�heavy 31.5�� 27.8 13.1 1 380.1 1 415.0 –2.5 43.9 50.9 –13.8

AVERAGE WEIGHT (POUNDS)

Less than 6,001 1 085.5�� 1 177.0 –7.8 13 235.0 15 428.4 –14.2 12.2 13.1 –7.06,001 to 8,500 277.8�� N N 4 049.8 N N 14.6 N N8,501 to 10,000 20.6�� N N 223.7 N N 10.8 N N10,001 to 14,000 34.0�� 15.6 117.6 384.7 295.9 30.0 11.3 18.9 –40.314,001 to 16,000 S�� 3.2 S S 63.4 S S 20.1 S

16,001 to 19,500 28.2�� 2.7 945.2 341.3 46.1 639.7 12.1 17.1 –29.219,501 to 26,000 15.8�� 9.6 64.5 254.6 204.0 24.8 16.1 21.2 –24.126,001 to 33,000 S�� 4.7 S 77.2 76.4 1.1 S 16.3 S33,001 to 40,000 1.9�� 5.3 –63.3 33.3 410.7 –91.9 17.1 77.5 –77.940,001 to 50,000 3.4�� 3.4 –.1 86.5 141.3 –38.8 25.4 41.5 –38.7

50,001 to 60,000 3.2�� 3.8 –16.7 77.3 149.2 –48.2 24.5 39.4 –37.860,001 to 80,000 16.3�� 10.6 54.2 1 087.5 633.6 71.6 66.8 60.0 11.380,001 to 100,000 S�� .1 S S S S S S S100,001 to 130,000 S�� V S S V S S V S130,001 or more S�� V S S V S S V S

TOTAL LENGTH (FEET)

Less than 20.0 1 267.9�� 1 329.5 –4.6 16 007.3 17 880.6 –10.5 12.6 13.4 –6.120.0 to 27.9 155.6�� 26.6 485.8 2 011.2 506.3 297.2 12.9 19.1 –32.228.0 to 35.9 44.1�� 12.8 245.8 565.5 253.4 123.2 12.8 19.9 –35.536.0 to 40.9 4.1�� 2.6 57.2 112.5 73.0 54.0 27.1 27.7 –2.041.0 to 44.9 S�� 1.4 S S 26.2 S S 19.3 S

45.0 to 49.9 S�� 1.2 S S 28.9 S S 24.7 S50.0 to 54.9 2.0�� 2.3 –10.9 68.3 120.1 –43.1 34.0 53.3 –36.155.0 to 59.9 1.8�� 3.5 –48.0 80.1 199.1 –59.8 43.8 56.6 –22.660.0 to 64.9 3.8�� 3.5 7.4 199.8 214.5 –6.9 53.2 61.4 –13.365.0 to 69.9 1.6�� 1.9 –15.1 103.9 141.3 –26.5 64.5 74.6 –13.5

70.0 to 74.9 6.2�� 1.3 391.7 596.2 112.0 432.4 96.9 89.5 8.375.0 to 79.9 .3�� N N 24.4 N N 70.3 N N80.0 or more .1�� N N S N N S N N

MILES PER GALLON

Less than 5 5.9�� 6.2 –4.2 145.1 199.5 –27.3 24.4 32.2 –24.15 to 6.9 12.3�� 21.1 –42.0 541.9 1 071.9 –49.4 44.2 50.7 –12.87 to 8.9 30.0�� 26.8 12.0 859.6 791.9 8.6 28.7 29.6 –3.19 to 10.9 123.9�� 119.9 3.3 1 266.9 1 448.0 –12.5 10.2 12.1 –15.311 to 12.9 120.2�� 135.9 –11.5 1 549.9 1 571.9 –1.4 12.9 11.6 11.413 to 14.9 138.0�� 166.0 –16.9 1 991.4 2 107.1 –5.5 14.4 12.7 13.815 or more 794.1�� 905.4 –12.3 10 709.8 12 612.6 –15.1 13.5 13.9 –3.2

15 to 20.9 595.4�� 651.0 –8.5 7 772.0 9 222.5 –15.7 13.1 14.2 –7.921 to 24.9 142.0�� 197.5 –28.1 2 038.2 2 679.1 –23.9 14.4 13.6 5.825 or more 56.7�� 56.9 –.3 899.5 711.0 26.5 15.9 12.5 26.9

Not reported 223.4�� 8.8 2 437.9 3 009.8 143.4 1 999.0 13.5 16.3 –17.3Not applicable2 52.3�� N N S N N S N N






Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

MODEL YEAR

2003 .7�� N N 58.6 N N 80.7 N N2002 122.8�� N N 2 147.3 N N 17.5 N N2001 126.5�� N N 2 127.2 N N 16.8 N N2000 179.6�� N N 2 897.3 N N 16.1 N N1999 103.7�� N N 2 007.3 N N 19.4 N N

1998 97.6�� S S 1 307.3 S S 13.4 S S1997 80.5�� 98.0 –17.8 1 328.6 1 712.6 –22.4 16.5 17.5 –5.61996 90.9�� 98.9 –8.1 1 397.7 1 851.3 –24.5 15.4 18.7 –17.91995 65.8�� 130.7 –49.7 871.5 2 161.1 –59.7 13.2 16.5 –19.91994 63.0�� 122.9 –48.7 733.0 2 099.9 –65.1 11.6 17.1 –31.91993 63.1�� 87.9 –28.3 744.2 1 210.0 –38.5 11.8 13.8 –14.2Pre�1993 505.8�� 851.1 –40.6 4 584.8 10 884.5 –57.9 9.1 12.8 –29.1

VEHICLE ACQUISITION

New 690.2�� 548.5 25.8 10 299.4 8 455.4 21.8 14.9 15.4 –3.2Used 725.3�� 730.3 –.7 8 422.6 9 238.1 –8.8 11.6 12.7 –8.2Not reported 84.5�� 111.3 –24.1 1 482.8 2 252.7 –34.2 17.5 20.2 –13.3

LEASE CHARACTERISTICS

Leased 134.8�� N N 2 579.6 N N 19.1 N NLessee 119.0�� N N 2 130.5 N N 17.9 N N

Vehicle only 9.8�� N N 410.8 N N 41.9 N NVehicle with driver S�� N N S N N S N NNot reported V�� N N V N N V N NNot applicable4 109.1�� N N 1 717.2 N N 15.7 N N

Lessor 12.1�� N N 382.1 N N 31.5 N NVehicle only 5.4�� N N 226.1 N N 42.1 N NVehicle with driver .1�� N N S N N S N NNot reported V�� N N V N N V N NNot applicable4 S�� N N S N N S N N

Not reported S�� N N S N N S N NNot leased 869.6�� N N 10 766.3 N N 12.4 N NNot reported 495.7�� N N 6 859.0 N N 13.8 N N

Length of leasing agreement:Leased 134.8�� N N 2 579.6 N N 19.1 N N

1 to 11 months .8�� N N 26.0 N N 31.9 N N12 months or more 14.6�� N N 634.9 N N 43.3 N NNot reported S�� N N S N N S N NNot applicable4 119.0�� N N 1 909.5 N N 16.0 N N

Provisions of lease5:Financing only 12.1�� N N 511.7 N N 42.4 N NFull maintenance 4.0�� N N 176.2 N N 43.5 N NPayment of taxes 5.4�� N N 224.3 N N 41.3 N NObtaining licenses and permits 4.9�� N N 207.4 N N 42.4 N NRecordkeeping 4.4�� N N 283.0 N N 64.3 N NFuel contract 1.6�� N N 54.4 N N 34.8 N N

PRIMARY OPERATORCLASSIFICATION

Private 263.4�� N N 5 358.6 N N 20.3 N NMotor carrier 25.2�� N N 1 058.5 N N 42.0 N NOwner operator S�� N N 258.7 N N S N NRental 85.9�� N N 1 172.5 N N 13.6 N NPersonal transportation 1 066.6�� N N 12 226.1 N N 11.5 N NNot applicable2 52.3�� N N S N N S N N

For�hire characteristics:Type of carrier:

Contract 8.4�� N N 678.7 N N 80.7 N NCommon 5.5�� N N 253.5 N N 46.4 N NNot reported 1.2�� N N 42.8 N N 34.9 N NNot applicable6 1 485.0�� N N 19 229.9 N N 12.9 N N

Type of service:Truckload 10.3�� 6.6 56.3 782.2 597.4 30.9 75.9 90.6 –16.2Less�than truckload 3.1�� 3.5 –11.2 141.2 135.5 4.2 45.0 38.4 17.2Not reported 1.7�� N N 51.5 N N 31.0 N NNot applicable6 1 485.0�� N N 19 229.9 N N 12.9 N N

Source of hauls:Shippers or receivers 10.7�� N N 804.0 N N 74.9 N NBrokers .8�� N N 62.3 N N 78.9 N NCentralized markets or exchanges .4�� N N 14.8 N N 39.0 N NOther V�� N N V N N V N NNot reported 3.2�� N N 93.9 N N 29.3 N NNot applicable6 1 485.0�� N N 19 229.9 N N 12.9 N N

HAZARDOUS MATERIALS CARRIED7

Carrying hazardous materials 3.2�� 6.9 –53.8 132.8 495.3 –73.2 41.9 72.2 –42.0Not carrying hazardous materials 45.1�� 51.4 –12.3 1 434.3 1 291.1 11.1 31.8 25.1 26.6Not reported 6.3�� 16.3 –61.0 176.3 365.6 –51.8 27.8 22.5 23.8Not applicable8 1 445.5�� N N 18 461.4 N N 12.8 N N

EQUIPMENT TYPE5 9

Aerial work platform/bucket 1.2�� N N S N N S N NAir bag(s) (safety device only) 797.1�� 318.0 150.7 12 146.1 5 516.1 120.2 15.2 17.3 –12.2Air compressor (except air brakes) 4.5�� N N 150.7 N N 33.1 N NAir�conditioning 1 299.4�� 1 102.9 17.8 18 672.6 16 520.3 13.0 14.4 15.0 –4.1Air springs 22.0�� N N 949.0 N N 43.1 N N






Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

EQUIPMENT TYPE5 9�Con.

Antilock brake system 849.9�� 530.8 60.1 13 236.3 9 055.8 46.2 15.6 17.1 –8.7Collision warning system .6�� N N 14.4 N N 25.6 N NComputerized drive train control unit 193.7�� N N 2 908.0 N N 15.0 N NCrane 1.0�� N N 19.0 N N 18.4 N NElectronic vehicle identification device 1.4�� 4.1 –66.3 83.2 428.7 –80.6 60.2 104.4 –42.4

Engine retarder/brake 15.0�� 13.7 8.8 960.5 970.5 –1.0 64.2 70.6 –9.1Front�wheel drive 476.2�� 189.5 151.2 6 116.9 2 554.6 139.4 12.8 13.5 –4.7Hoist 2.2�� N N 35.3 N N 15.8 N NIdle�reducing technology (portable auxiliary pack,electrification, etc.) 5.4�� N N 472.3 N N 87.1 N N

Internet access .2�� N N 17.8 N N 112.7 N N

Lift gate 4.8�� N N 91.5 N N 19.0 N NMounting bar for snowplow S�� N N S N N S N NNavigational system .2�� S S 6.6 S S 34.7 S SPower take�off 11.5�� N N 289.4 N N 25.2 N NRadial tires 996.5�� 1 095.6 –9.0 14 036.8 16 372.4 –14.3 14.1 14.9 –5.7

Reflective material in addition to those requiredby law 10.8�� 14.4 –25.0 644.8 802.3 –19.6 59.6 55.6 7.2

Road speed governor 51.9�� 19.6 164.8 1 404.8 1 014.5 38.5 27.0 51.7 –47.7Toolbox 187.8�� N N 3 148.3 N N 16.8 N NTrip recorder or on�board computer withcommunication capabilities 42.6�� N N 1 177.2 N N 27.7 N N

Trip recorder or on�board computer withoutcommunication capabilities 241.7�� N N 3 257.3 N N 13.5 N N

Vehicle control aids for handicapped drivers V�� S S V S S V S SWheelchair lift S�� S S S S S S S SWinch 11.7�� N N S N N S N N

Transmission type:Automatic 1 096.9�� N N 14 321.7 N N 13.1 N NManual 354.9�� N N 5 205.4 N N 14.7 N NSemiautomated manual S�� N N S N N S N NAutomated manual S�� N N S N N S N NNot reported 41.5�� N N 590.0 N N 14.2 N N

Braking system:Hydraulic (standard) 14.8�� 14.1 5.6 203.8 204.0 –.1 13.7 14.5 –5.3Hydraulic with power assist 74.7�� 21.0 256.3 906.2 350.9 158.2 12.1 16.7 –27.5Air 28.1�� 28.2 –.3 1 298.3 1 422.8 –8.7 46.1 50.4 –8.5Other V�� 1.2 N V 21.6 N V 18.7 NNot reported 5.1�� N N 141.4 N N 27.7 N NNot applicable10 1 377.3�� N N 17 655.1 N N 12.8 N N

FUEL TYPE AND ENGINE SIZE

Fuel type:Gasoline 1 315.1�� 1 302.0 1.0 17 249.1 17 427.9 –1.0 13.1 13.4 –2.0Diesel 111.1�� 82.6 34.5 2 610.8 2 434.8 7.2 23.5 29.5 –20.3Natural gas V�� N N V N N V N NPropane S�� N N S N N S N NAlcohol fuels V�� N N V N N V N N

Electricity V�� N N V N N V N NCombination 17.2�� N N 164.3 N N 9.6 N NOther V�� N N V N N V N NNot reported V�� N N V N N V N NNot applicable2 52.3�� N N S N N S N N

Cylinders11:4 cylinders 194.2�� 290.0 –33.0 2 582.0 3 971.1 –35.0 13.3 13.7 –2.96 cylinders 632.9�� 508.2 24.5 9 448.6 8 118.7 16.4 14.9 16.0 –6.58 cylinders 638.1�� 546.5 16.8 7 901.8 7 536.7 4.8 12.4 13.8 –10.2Other 34.8�� 45.2 –23.0 272.4 319.9 –14.9 7.8 7.1 10.7

Cubic inch displacement11:Gasoline fuel 1 315.1�� 1 302.0 1.0 17 249.1 17 427.9 –1.0 13.1 13.4 –2.0

Less than 200 349.1�� 406.9 –14.2 4 566.9 5 342.8 –14.5 13.1 13.1 –.4200 to 299 437.6�� 310.4 41.0 6 388.0 4 587.7 39.2 14.6 14.8 –1.2300 to 349 221.8�� 184.8 20.0 2 538.0 2 528.9 .4 11.4 13.7 –16.4350 to 399 216.3�� 264.1 –18.1 2 799.2 3 553.7 –21.2 12.9 13.5 –3.8400 or more 54.7�� 67.7 –19.2 753.8 1 046.5 –28.0 13.8 15.5 –10.9Not available 35.7�� 68.1 –47.5 203.1 368.4 –44.9 5.7 5.4 5.0

Diesel fuel 111.1�� 82.6 34.5 2 610.8 2 434.8 7.2 23.5 29.5 –20.3Less than 400 27.0�� 39.2 –31.1 S 696.8 S S 17.8 S400 to 599 62.7�� 19.3 224.6 793.8 397.2 99.8 12.7 20.6 –38.4600 to 799 12.9�� 10.5 22.6 856.8 674.1 27.1 66.4 64.0 3.7800 or more 6.2�� 7.5 –18.0 340.1 477.7 –28.8 55.0 63.3 –13.1Not available 2.4�� 6.1 –60.5 77.3 188.9 –59.1 32.3 31.2 3.5

Other fuel 21.4�� S S 214.5 S S 10.0 S SLess than 400 20.6�� S S 204.6 S S 9.9 S S400 or more .7�� S S S S S S S SNot available S�� S S S S S S S S

Not reported V�� N N V N N V N NNot applicable2 52.3�� N N S N N S N N

REFUELING LOCATION

Gas station 1 318.0�� N N 17 406.2 N N 13.2 N NTruck stop 13.9�� N N 460.8 N N 33.1 N NOwn facility (including home, farm, ranch, onsiteby mobile supplier, etc.) 39.5�� N N 1 183.8 N N 29.9 N N

Other company’s/contractor’s facility not open tothe public 18.1�� N N 398.0 N N 22.0 N N

Other V�� N N V N N V N NNot reported 58.1�� N N 625.6 N N 10.8 N NNot applicable2 52.3�� N N S N N S N N






Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

MAINTENANCE5

General maintenance performed by:None performed 21.1�� 12.9 63.3 S S S S S SCompany�owned maintenance facility 191.2�� 109.9 73.9 3 463.9 3 011.5 15.0 18.1 27.4 –33.9General repair business or private mechanic 602.1�� 472.2 27.5 9 000.2 7 266.8 23.9 14.9 15.4 –2.9Dealership service department 386.7�� 316.2 22.3 6 189.0 4 523.1 36.8 16.0 14.3 11.9Leasing company S�� 5.3 S 49.5 233.2 –78.8 S 44.1 S

Individual not employed/paid by anymaintenance type facility 456.2�� 665.6 –31.5 5 363.6 8 740.2 –38.6 11.8 13.1 –10.5

Other V�� S S V S S V S SNot reported 64.2�� 53.9 19.1 698.3 733.9 –4.9 10.9 13.6 –20.1Not applicable2 52.3�� N N S N N S N N

Extensive repairs performed by:None performed 1 128.0�� 76.8 1 368.1 15 200.1 1 155.6 1 215.3 13.5 15.0 –10.4Company�owned maintenance facility 24.3�� 49.5 –50.8 313.5 1 056.9 –70.3 12.9 21.3 –39.7General repair business or private mechanic 108.2�� 258.1 –58.1 1 785.4 3 614.5 –50.6 16.5 14.0 17.8Dealership service department 42.9�� 200.8 –78.6 1 249.4 3 709.4 –66.3 29.1 18.5 57.5Leasing company S�� 5.0 S S 179.8 S S 36.3 S

Component distributorship (engine,transmission, body, etc.) S�� 29.2 S S 843.8 S S 28.9 S

Individual not employed/paid by any repair typefacility 81.7�� 150.1 –45.6 599.0 1 688.1 –64.5 7.3 11.2 –34.8

Other V�� 9.9 N V S S V S SNot reported S�� 658.2 S S 8 740.0 S S 13.3 SNot applicable2 52.3�� N N S N N S N N

TRUCK TYPE AND AXLEARRANGEMENT

Single�unit trucks and truck�tractors withouttrailer 1 457.0�� 1 356.8 7.4 18 485.6 18 353.5 .7 12.7 13.5 –6.22 axles 1 449.9�� 1 350.6 7.4 18 361.1 18 220.2 .8 12.7 13.5 –6.13 axles 5.0�� 4.4 14.4 72.8 86.1 –15.4 14.6 19.8 –26.14 axles .3�� 1.9 –83.0 6.3 47.1 –86.6 20.0 25.4 –21.25 axles or more 1.7�� N N 43.8 N N 25.3 N NNot reported .1�� V N S V S S V S

Combinations 43.0�� 33.2 29.5 1 719.2 1 592.8 7.9 40.0 47.9 –16.6Single�unit trucks with trailer 26.2�� 17.1 53.0 S 435.3 S S 25.4 S

3 axles S�� 8.2 S S S S S S S4 axles 18.5�� 7.6 142.5 S 104.4 S S 13.7 S5 axles or more S�� 1.3 S S 58.6 S S 44.0 SNot reported S�� N N S N N S N N

Truck�tractors with single trailer 15.6�� 11.9 31.1 1 070.0 757.1 41.3 68.5 63.5 7.83 axles .9�� 1.1 –17.9 26.5 35.2 –24.7 29.1 31.7 –8.34 axles 1.4�� 1.8 –20.9 51.2 77.9 –34.3 35.3 42.6 –17.05 axles or more 12.2�� 9.0 35.7 945.5 644.0 46.8 77.6 71.7 8.2Not reported 1.1�� N N 46.9 N N 43.7 N N

Truck�tractors with double trailers 1.2�� 2.8 –57.6 92.7 264.1 –64.9 77.6 93.7 –17.35 axles .9�� .6 65.0 82.6 35.4 133.1 87.5 62.0 41.36 axles .2�� 1.0 –81.8 S 99.3 S S 95.6 S7 axles S�� 1.2 S S 124.5 S S 107.8 S8 axles or more S�� S S S S S S S SNot reported V�� N N V N N V N N

Truck�tractors with triple trailers V�� 1.4 N V 136.2 N V 100.0 N7 axles V�� S S V S S V S S8 axles V�� .4 N V 40.0 N V 110.1 N9 axles V�� 1.0 N V 96.1 N V 98.7 N10 axles or more V�� V N V V N V V NNot reported V�� N N V N N V N N

Driving axles:1 1 002.3�� 884.1 13.4 12 951.9 12 522.2 3.4 12.9 14.2 –8.82 497.5�� 505.7 –1.6 7 251.1 7 402.9 –2.1 14.6 14.6 –.43 or more S�� .3 S S 21.1 S S 81.4 SNot reported .2�� V N S V S S V S

Total liftable axles and locations12:None 120.4�� 21.1 471.5 2 495.2 671.6 271.5 20.7 31.9 –35.01 .5�� .8 –41.6 10.5 14.5 –27.9 22.1 17.9 23.6

Forward of the drive axle .2�� N N S N N S N NBelow the chassis .1�� N N S N N S N NBeyond the chassis S�� N N S N N S N NNot reported S�� N N S N N S N N

2 or more 1.7�� 1.6 6.9 43.8 51.0 –14.1 25.3 31.5 –19.6Forward of the drive axle 1.6�� N N 41.4 N N 25.3 N NBelow the chassis S�� N N S N N S N NBeyond the chassis 1.5�� N N 37.5 N N 25.3 N NNot reported S�� N N S N N S N N

Not reported .2�� N N S N N S N NNot applicable10 1 377.3�� N N 17 655.1 N N 12.8 N N

Total liftable axles and number of braking axles:None 120.4�� 21.1 471.5 2 495.2 671.6 271.5 20.7 31.9 –35.01 .5�� .8 –41.6 10.5 14.5 –27.9 22.1 17.9 23.6

0 braking S�� N N S N N S N N1 braking .4�� N N 9.6 N N 23.4 N NNot reported S�� N N S N N S N N

2 or more 1.7�� 1.6 6.9 43.8 51.0 –14.1 25.3 31.5 –19.60 braking V�� N N V N N V N N1 braking V�� N N V N N V N N2 or more braking 1.7�� N N 42.9 N N 25.2 N NNot reported S�� N N S N N S N N

Not reported .2�� N N S N N S N NNot applicable10 1 377.3�� N N 17 655.1 N N 12.8 N N






Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

CAB TYPE

Conventional cab 110.4�� 51.9 112.7 1 963.3 1 704.8 15.2 17.8 32.8 –45.9With sleeper 4.6�� N N 339.2 N N 74.1 N NWithout sleeper 105.4�� N N 1 596.9 N N 15.2 N NNot reported .5�� N N 27.2 N N 53.9 N N

Cab over engine 11.9�� 9.9 20.9 580.7 260.8 122.7 48.7 26.5 84.3With sleeper 4.3�� N N 406.3 N N 94.6 N NWithout sleeper 7.5�� N N 158.5 N N 21.2 N NNot reported .2�� N N 15.9 N N 100.5 N N

Cab forward of engine S�� 2.6 S S 46.3 S S 17.8 SCab beside engine V�� .5 N V 2.8 N V 6.3 NNot reported .2�� N N S N N S N NNot applicable10 1 377.3�� N N 17 655.1 N N 12.8 N N


1Comparability of estimates may vary across survey years due to changes in category definitions.2Vehicles not in use. When the respondent had partial�year ownership of the vehicle, annual miles were adjusted to reflect miles traveled when not owned by the respondent.3Truck�tractors not in use.4Lessees or lessors of pickups, minivans, other light vans, and sport utilities.5Detail lines do not add to total because items were not applicable or multiple responses were possible.6Includes pickups, minivans, other light vans, and sport utilities; all other vehicles that are private, rental, or used for personal transportation; and vehicles not in use.7Distributed miles data are available in Table 8.8Includes pickups, minivans, other light vans, and sport utilities; all other vehicles that are rental or used for personal transportation; and vehicles not in use.9Pickups, minivans, other light vans, and sport utilites, in the Equipment Type section, were only required to report for aerial work platform/bucket, air bag(s), air�conditioning, antilock brake

system, computerized drive train control unit, front�wheel drive, mounting bar for snowplow, radial tires, toolbox, trip recorder, vehicle control aids for handicapped drivers, wheelchair lift, and winch.10Pickups, minivans, other light vans, and sport utilities.11Data were derived from administrative records.12Detail lines do not add to the subtotal line because items were not applicable or multiple responses were possible. When 2 or 3 liftable axles were indicated, respondents properly reported

multiple responses, therefore detail lines will be significantly greater than the corresponding subtotal line.

Note: Use caution when assessing the true increase or decrease in any particular data line. Large changes in the "not reported" or "not applicable" estimates should be taken into account.

Note: Table 2b provides estimated measures of sampling variability. The Introduction gives information on confidentiality protection, sampling error, nonsampling error, sample design, anddefinitions. Links to this information on the Internet may be found at www.census.gov/svsd/www/02vehinv.html.


Table 2b. Trucks, Truck Miles, and Average Annual Miles for All Trucks�Measures of SamplingVariability: 2002 and 1997

[Estimates are shown as percents and are based on data from the 2002 and 1997 Vehicle Inventory and Use Surveys. Columns A, B, D, E, G, H show estimated coefficients of variation. Columns C, F,and I show estimated standard errors]

Vehicular and operational characteristics2002

trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

Total 1.0�� 1.1 1.6 3.6 3.2 4.9 3.5 3.0 4.3

BUSINESS

For�hire transportation or warehousing 27.9�� 19.0 63.4 24.2 7.1 43.9 14.9 16.7 20.7Vehicle leasing or rental 10.3�� 36.2 197.6 13.8 38.9 112.0 6.8 13.3 7.7Agriculture, forestry, fishing, or hunting 19.7�� 25.2 2.3 21.2 31.3 3.2 16.9 18.5 29.2Mining 26.4�� S S 36.9 48.6 16.9 19.4 S SUtilities 35.0�� 45.3 132.7 38.0 S S 10.7 S S

Construction 17.6�� 10.9 11.5 18.6 13.9 12.3 6.8 8.6 10.5Manufacturing 36.5�� S S S 32.7 S S S SWholesale trade 43.4�� 24.1 16.5 32.3 33.0 11.2 19.6 23.4 22.4Retail trade 29.8�� 25.0 36.2 29.9 24.4 36.3 12.4 11.1 16.8Information services S�� N N S N N S N N


Arts, entertainment, or recreation services 38.0�� N N 43.7 N N 37.9 N NAccommodation or food services S�� N N S N N S N NOther services 23.8�� N N 30.0 N N 17.6 N NPersonal transportation 2.9�� 2.5 4.0 4.6 4.2 6.2 3.6 3.4 4.7Not reported 36.0�� N N 47.7 N N 32.9 N NNot applicable1 23.6�� 33.5 116.7 S S S S S S

BODY TYPE

Single�unit trucks 1.1�� 1.1 1.6 3.8 3.4 5.2 3.7 3.1 4.5Pickup 1.8�� 1.4 2.2 6.6 4.8 6.8 6.4 4.5 6.9Minivan 11.9�� 14.6 33.6 13.9 19.4 45.3 7.2 11.4 14.3Other light vans 17.6�� 14.3 19.6 21.8 20.8 29.5 12.9 14.4 21.8Sport utility 6.2�� 5.5 9.4 8.5 7.4 13.1 5.8 4.8 7.7Armored N�� N N N N N N N N

Beverage 47.6�� 36.2 53.9 S 42.8 S S 30.1 SConcrete mixer 13.0�� 10.9 15.0 14.8 12.6 15.7 7.1 6.5 8.7Concrete pumper 40.0�� N N S N N S N NCrane S�� 26.8 S S 31.0 S S 15.9 SCurtainside S�� N N N N N S N N

Dump 13.4�� 10.4 14.5 20.3 12.8 20.4 17.0 10.5 19.9Flatbed, stake, or platform 9.7�� 7.2 9.2 12.2 10.3 11.8 8.4 6.8 10.4Low boy N�� 44.4 N N 40.4 N N 17.1 NPole, logging, pulpwood, or pipe N�� 49.0 N N S S N S SService, utility 19.0�� 24.8 89.5 25.6 S S 16.8 S S

Service, other 21.3�� 13.0 14.7 27.6 16.6 16.5 18.5 10.3 18.4Street sweeper S�� N N S N N S N NTank, dry bulk 49.1�� N N S N S S N STank, liquids or gases 18.7�� 17.2 32.6 26.7 22.8 31.5 23.8 16.6 20.3Tow/Wrecker 34.8�� 32.3 34.4 49.8 37.0 26.6 36.1 23.0 25.4

Trash, garbage, or recycling 18.5�� 17.1 31.2 21.3 19.0 24.4 17.7 14.4 15.7Vacuum S�� N N S N N S N NVan, basic enclosed 2.9�� 10.2 99.4 4.1 15.9 78.3 2.9 11.3 5.9Van, insulated nonrefrigerated S�� S S S S S S S SVan, insulated refrigerated 30.5�� 28.2 51.8 30.6 34.8 44.0 8.8 17.8 15.1

Van, open top S�� S S S S S S S SVan, step, walk�in, or multistop 20.6�� 13.0 9.5 24.7 15.3 10.2 15.2 7.3 15.2Van, other 48.7�� N N S N N S N NOther N�� N N N N N N N N

Truck�tractors 3.0�� 4.1 5.5 4.1 6.0 7.3 3.1 3.4 4.2Automobile carrier 43.9�� 48.9 99.8 S S S S S SBeverage 41.1�� 28.1 70.3 41.4 32.1 82.0 37.3 15.5 44.8Curtainside N�� N N N N N N N NDump 12.0�� 12.1 21.4 14.1 15.1 26.2 7.5 9.0 11.8Flatbed, stake, or platform 12.5�� 13.9 25.2 15.2 17.8 23.8 7.5 8.4 8.5

Livestock S�� S S S S S S S SLow boy 32.6�� 29.7 20.3 36.7 33.6 31.9 16.8 12.4 29.1Mobile home toter S�� N N S N N S N NOpen top 37.1�� 48.9 130.5 46.2 S S 27.5 S SPole, logging, pulpwood, or pipe N�� S S N S S N S S

Tank, dry bulk 38.9�� 26.0 60.6 39.6 26.7 59.4 5.1 6.3 7.8Tank, liquids or gases 22.9�� 18.5 23.9 27.5 22.3 28.0 15.2 12.5 19.2Van, basic enclosed 5.1�� 7.1 9.4 6.3 8.8 11.6 3.3 4.1 5.3Van, drop�frame 43.9�� 32.5 36.9 S 44.6 S S 30.5 SVan, insulated nonrefrigerated S�� N S S N S S N S

Van, insulated refrigerated 16.7�� 16.6 16.9 16.2 21.5 17.0 10.5 10.8 13.2Other S�� N N S N N S N NNot applicable2 20.3�� N N N N N N N N

ANNUAL MILES

Less than 5,000 12.0�� 9.6 13.9 14.7 12.0 16.4 8.8 7.2 10.95,000 to 9,999 8.8�� 8.9 16.6 9.0 9.1 18.2 2.0 2.0 3.010,000 to 19,999 4.9�� 4.6 7.6 5.1 4.7 7.9 1.3 1.2 1.820,000 to 29,999 13.0�� 10.0 13.0 13.1 10.0 13.3 1.5 1.3 2.030,000 to 49,999 22.6�� 15.8 17.2 22.7 15.9 17.8 3.4 2.2 4.2

50,000 to 74,999 38.8�� 34.5 76.4 38.0 35.3 69.5 3.1 4.9 5.275,000 or more 31.4�� 24.7 45.2 28.8 23.5 39.2 4.4 1.9 4.4Not applicable1 23.6�� 38.7 176.1 S N S S N S



Table 2b. Trucks, Truck Miles, and Average Annual Miles for All Trucks�Measures of SamplingVariability: 2002 and 1997�Con.



trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I


Off�the�road 32.1�� 21.1 24.0 38.8 32.9 17.9 24.0 24.3 19.250 miles or less 3.8�� 2.5 4.0 5.4 4.1 6.1 4.0 3.1 5.251 to 100 miles 12.1�� 11.3 18.4 14.2 14.0 16.7 7.2 8.7 8.5101 to 200 miles 22.1�� 17.8 25.6 26.6 18.6 25.7 16.5 9.3 16.7201 to 500 miles 27.5�� 21.7 21.7 44.8 22.6 24.7 33.7 17.6 30.2

501 miles or more 19.7�� 22.9 35.0 25.5 16.9 70.6 20.8 13.1 49.1Not reported 11.6�� 38.7 620.9 12.8 N N 6.7 N NNot applicable1 23.6�� N N S N N S N N


Operated in Canada 44.4�� N N 46.7 N N 14.3 N NOperated in Mexico S�� N N S N N S N NOperated within the home base state 2.4�� N N 4.4 N N 3.6 N NOperated in states other than the home basestate 14.0�� N N 20.5 N N 15.7 N N

Not reported 12.7�� N N 13.4 N N 6.5 N NNot applicable1 23.6�� N N S N N S N N

MONTHS OPERATED

12 3.3�� N N 4.8 N N 3.6 N N7 to 11 10.3�� N N 13.8 N N 9.9 N N2 to 6 13.4�� N N 17.9 N N 12.2 N N1 or less 30.5�� N N 49.8 N N 39.6 N NVehicle not used 23.6�� N N S N N S N N

VEHICLE SIZE

Light 1.2�� 1.2 1.7 3.9 3.6 5.2 3.7 3.3 4.7Medium 5.7�� 19.4 64.7 25.9 27.0 98.0 20.9 12.5 19.9Light�heavy 8.9�� 8.6 20.4 10.8 12.8 20.9 6.1 9.5 8.6Heavy�heavy 11.2�� 3.6 13.3 4.1 5.1 6.4 9.4 3.9 8.8


Less than 6,001 2.8�� 1.8 3.1 5.3 3.9 5.6 4.5 3.3 5.26,001 to 8,500 9.8�� N N 12.0 N N 6.9 N N8,501 to 10,000 36.7�� N N 36.7 N N 14.2 N N10,001 to 14,000 5.5�� 26.4 58.6 7.6 36.6 48.5 5.3 16.5 10.414,001 to 16,000 S�� 15.6 S S 19.0 S S 12.7 S

16,001 to 19,500 6.3�� 18.0 199.1 7.6 29.3 223.6 4.4 21.2 15.319,501 to 26,000 8.9�� 8.6 20.4 10.8 12.8 20.9 6.1 9.5 8.626,001 to 33,000 S�� 14.8 S 40.2 16.7 44.0 S 10.6 S33,001 to 40,000 20.2�� 9.4 8.2 31.5 10.9 2.7 25.0 5.6 5.740,001 to 50,000 11.5�� 10.2 15.4 19.6 19.5 16.9 14.8 13.5 12.3

50,001 to 60,000 9.3�� 10.8 11.9 14.7 17.0 11.6 11.2 11.8 10.160,001 to 80,000 3.1�� 5.2 9.4 4.2 8.1 15.7 2.9 4.9 6.480,001 to 100,000 S�� 48.9 S S S S S S S100,001 to 130,000 S�� N S S N S S N S130,001 or more S�� N S S N S S N S

TOTAL LENGTH (FEET)

Less than 20.0 1.9�� 1.2 2.2 4.4 3.5 5.0 3.9 3.2 4.820.0 to 27.9 12.1�� 15.8 116.6 15.5 33.5 146.7 9.1 24.2 17.628.0 to 35.9 14.0�� 26.8 104.6 12.7 29.5 71.6 5.6 20.6 13.836.0 to 40.9 13.0�� 13.3 29.3 16.1 16.6 35.7 11.4 9.4 14.541.0 to 44.9 S�� 21.5 S S 25.8 S S 16.7 S

45.0 to 49.9 S�� 22.4 S S 43.7 S S 31.5 S50.0 to 54.9 20.9�� 15.3 23.0 20.8 18.1 15.6 18.5 12.2 14.155.0 to 59.9 12.5�� 9.0 8.0 15.5 10.6 7.5 9.2 5.8 8.460.0 to 64.9 9.1�� 11.8 16.0 11.9 17.0 19.3 6.8 9.6 10.165.0 to 69.9 13.4�� 10.9 14.7 16.1 12.6 15.0 9.0 6.2 9.5

70.0 to 74.9 6.1�� 23.3 118.5 7.2 32.0 174.8 3.2 11.9 13.375.0 to 79.9 29.5�� N N 31.9 N N 12.1 N N80.0 or more 49.1�� N N S N N S N N

MILES PER GALLON

Less than 5 10.0�� 7.8 12.1 10.6 8.9 10.1 7.8 7.6 8.25 to 6.9 6.7�� 4.8 4.8 7.5 6.6 5.1 6.3 4.9 7.07 to 8.9 5.7�� 21.6 25.1 5.6 33.2 36.5 4.8 23.7 23.49 to 10.9 13.0�� 13.3 19.2 15.6 17.9 20.8 9.7 11.3 12.611 to 12.9 15.6�� 12.4 17.6 19.5 17.1 25.6 12.1 11.1 18.313 to 14.9 14.4�� 11.0 15.1 19.6 13.5 22.5 13.2 7.9 17.515 or more 4.3�� 3.1 4.6 6.1 4.8 6.6 4.4 3.7 5.6

15 to 20.9 5.7�� 4.3 6.6 7.6 6.1 8.2 5.1 4.3 6.221 to 24.9 14.5�� 10.3 12.8 17.3 13.2 16.6 9.7 7.9 13.225 or more 23.8�� 20.0 31.0 30.1 25.2 49.7 18.3 15.8 30.7

Not reported 11.0�� 9.8 374.5 15.4 16.4 473.2 11.3 12.7 14.1Not applicable1 23.6�� N N S N N S N N






trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

MODEL YEAR

2003 20.1�� N N 21.4 N N 7.3 N N2002 15.2�� N N 14.6 N N 7.2 N N2001 15.3�� N N 16.7 N N 8.6 N N2000 12.2�� N N 12.9 N N 5.6 N N1999 17.0�� N N 24.9 N N 18.6 N N

1998 17.4�� S S 18.1 S S 8.3 S S1997 19.3�� 14.8 20.0 21.7 14.7 20.4 11.1 7.2 12.51996 18.2�� 14.7 21.5 20.0 15.6 19.1 9.7 7.5 10.11995 21.0�� 12.6 12.3 22.1 13.9 10.5 10.4 7.2 10.11994 21.3�� 13.4 12.9 21.3 14.7 9.0 8.6 7.6 7.81993 21.5�� 15.8 19.1 21.9 16.6 16.9 7.9 8.6 10.0Pre�1993 6.2�� 3.3 4.2 10.4 5.6 5.0 8.5 4.6 6.8

VEHICLE ACQUISITION

New 5.0�� 5.1 8.9 6.8 6.7 11.6 4.9 4.5 6.5Used 4.8�� 3.9 6.2 6.8 6.0 8.3 5.0 4.6 6.2Not reported 18.9�� 13.8 17.8 23.3 13.7 17.8 13.8 6.4 13.2


Leased 14.1�� N N 13.5 N N 6.6 N NLessee 15.4�� N N 15.4 N N 7.5 N N

Vehicle only 9.7�� N N 8.8 N N 7.2 N NVehicle with driver S�� N N S N N S N NNot reported N�� N N N N N N N NNot applicable3 16.8�� N N 19.0 N N 8.9 N N

Lessor 39.1�� N N 28.5 N N 15.5 N NVehicle only 12.3�� N N 11.5 N N 8.3 N NVehicle with driver 49.2�� N N S N N S N NNot reported N�� N N N N N N N NNot applicable3 S�� N N S N N S N N

Not reported S�� N N S N N S N NNot leased 4.0�� N N 5.6 N N 4.1 N NNot reported 6.6�� N N 9.9 N N 7.4 N N

Length of leasing agreement:Leased 14.1�� N N 13.5 N N 6.6 N N

1 to 11 months 35.3�� N N 29.7 N N 27.2 N N12 months or more 7.6�� N N 6.8 N N 5.5 N NNot reported S�� N N S N N S N NNot applicable3 16.0�� N N 18.1 N N 8.3 N N

Provisions of lease:Financing only 8.6�� N N 7.5 N N 6.1 N NFull maintenance 14.9�� N N 13.7 N N 9.0 N NPayment of taxes 12.7�� N N 11.9 N N 8.3 N NObtaining licenses and permits 13.3�� N N 12.5 N N 9.3 N NRecordkeeping 12.3�� N N 10.1 N N 8.4 N NFuel contract 25.7�� N N 22.0 N N 14.6 N N


Private 9.6�� N N 12.8 N N 8.5 N NMotor carrier 26.5�� N N 12.5 N N 15.5 N NOwner operator S�� N N 40.7 N N S N NRental 10.3�� N N 13.7 N N 6.7 N NPersonal transportation 2.9�� N N 4.6 N N 3.6 N NNot applicable1 23.6�� N N S N N S N N


Contract 7.3�� N N 6.7 N N 4.5 N NCommon 11.3�� N N 12.7 N N 10.0 N NNot reported 22.4�� N N 21.5 N N 14.8 N NNot applicable4 1.1�� N N 3.8 N N 3.6 N N

Type of service:Truckload 6.0�� 7.6 15.1 5.6 8.5 13.4 4.3 3.6 4.7Less�than truckload 17.0�� 16.8 21.2 21.8 13.5 26.6 14.8 11.4 21.9Not reported 23.0�� N N 21.3 N N 14.1 N NNot applicable4 1.1�� N N 3.8 N N 3.6 N N

Source of hauls:Shippers or receivers 6.7�� N N 6.3 N N 4.7 N NBrokers 19.3�� N N 21.6 N N 9.6 N NCentralized markets or exchanges 28.3�� N N 32.8 N N 16.7 N NOther N�� N N N N N N N NNot reported 16.1�� N N 18.6 N N 12.9 N NNot applicable4 1.1�� N N 3.8 N N 3.6 N N


Carrying hazardous materials 16.2�� 8.7 8.5 20.3 9.7 6.0 16.9 6.5 10.5Not carrying hazardous materials 3.9�� 2.8 4.2 3.9 4.8 6.9 3.6 3.8 6.7Not reported 12.2�� 7.4 5.6 12.1 11.3 8.0 10.5 9.2 17.3Not applicable6 1.1�� N N 3.9 N N 3.8 N N






trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

EQUIPMENT TYPE 7

Aerial work platform/bucket 35.7�� N N S N N S N NAir bag(s) (safety device only) 4.2�� 7.6 21.8 6.0 8.4 22.7 4.4 4.2 5.3Air compressor (except air brakes) 14.2�� N N 13.8 N N 12.5 N NAir�conditioning 2.0�� 2.3 3.6 4.1 3.8 6.2 3.6 3.0 4.5Air springs 6.1�� N N 5.0 N N 5.5 N N

Antilock brake system 4.0�� 5.3 10.7 5.6 6.7 12.8 4.1 4.1 5.3Collision warning system 48.7�� N N 42.1 N N 26.1 N NComputerized drive train control unit 12.1�� N N 13.6 N N 6.8 N NCrane 31.9�� N N 34.9 N N 23.6 N NElectronic vehicle identification device 22.8�� 11.3 8.6 21.0 11.7 4.7 12.1 3.9 7.3

Engine retarder/brake 3.8�� 5.4 7.2 4.5 7.2 8.4 3.4 4.3 5.0Front�wheel drive 6.8�� 10.1 30.7 9.5 12.4 37.4 6.7 6.9 9.1Hoist 18.0�� N N 20.5 N N 15.6 N NIdle�reducing technology (portable auxiliary pack,electrification, etc.) 8.4�� N N 7.6 N N 6.3 N N

Internet access 43.8�� N N 44.1 N N 5.3 N N

Lift gate 15.4�� N N 16.7 N N 9.0 N NMounting bar for snowplow S�� N N S N N S N NNavigational system 40.0�� S S 42.1 S S 13.1 S SPower take�off 7.4�� N N 8.3 N N 7.1 N NRadial tires 3.4�� 2.3 3.7 5.1 4.0 5.6 4.0 3.1 4.8

Reflective material in addition to those requiredby law 7.2�� 6.6 7.3 7.1 8.2 8.7 6.1 6.0 9.2

Road speed governor 3.8�� 5.8 18.4 3.8 6.9 11.0 3.6 5.3 3.3Toolbox 11.7�� N N 15.0 N N 10.0 N NTrip recorder or on�board computer withcommunication capabilities 25.2�� N N 16.6 N N 12.4 N N

Trip recorder or on�board computer withoutcommunication capabilities 10.5�� N N 12.3 N N 6.7 N N

Vehicle control aids for handicapped drivers N�� S S N S S N S SWheelchair lift S�� S S S S S S S SWinch 49.7�� N N S N N S N N

Transmission type:Automatic 2.8�� N N 4.8 N N 4.0 N NManual 7.6�� N N 9.9 N N 7.9 N NSemiautomated manual S�� N N S N N S N NAutomated manual S�� N N S N N S N NNot reported 26.5�� N N 23.8 N N 7.3 N N

Braking system:Hydraulic (standard) 8.7�� 7.9 12.4 12.0 11.1 16.3 8.9 6.9 10.7Hydraulic with power assist 2.4�� 5.8 22.5 3.8 8.8 24.8 2.9 6.3 5.1Air 3.7�� 3.4 5.0 3.9 5.1 5.9 3.7 3.7 4.8Other N�� 26.5 N N 38.8 N N 27.8 NNot reported 13.9�� N N 13.4 N N 9.7 N NNot applicable8 1.1�� N N 4.1 N N 3.9 N N


Fuel type:Gasoline 1.7�� 1.4 2.2 4.1 3.7 5.5 3.7 3.3 4.9Diesel 9.7�� 11.6 20.3 11.5 8.4 15.3 9.4 6.8 9.2Natural gas N�� N N N N N N N NPropane S�� N N S N N S N NAlcohol fuels N�� N N N N N N N N

Electricity N�� N N N N N N N NCombination 42.8�� N N 47.0 N N 20.8 N NOther N�� N N N N N N N NNot reported N�� N N N N N N N NNot applicable1 23.6�� N N S N N S N N

Cylinders9:4 cylinders 12.1�� 7.9 9.6 15.0 10.8 12.0 9.1 7.5 11.56 cylinders 5.1�� 5.2 9.1 6.5 6.7 10.9 4.7 4.6 6.28 cylinders 5.2�� 5.0 8.5 8.0 6.7 10.9 6.0 4.5 6.8Other 27.3�� 19.2 25.7 39.1 20.2 37.5 29.4 16.4 37.2

Cubic inch displacement9:Gasoline fuel 1.7�� 1.4 2.2 4.1 3.7 5.5 3.7 3.3 4.9

Less than 200 8.5�� 6.4 9.1 10.8 8.8 11.9 6.7 6.0 9.0200 to 299 7.0�� 7.5 14.5 9.7 10.6 20.0 6.6 7.0 9.5300 to 349 11.2�� 10.6 18.5 13.8 13.0 19.0 7.9 7.0 8.8350 to 399 11.1�� 8.4 11.4 14.6 10.9 14.3 9.3 7.1 11.2400 or more 21.2�� 17.2 22.1 23.6 21.9 23.2 13.4 13.8 17.1Not available 29.4�� 17.0 17.8 38.5 25.1 25.3 23.9 18.6 31.8

Diesel fuel 9.7�� 11.6 20.3 11.5 8.4 15.3 9.4 6.8 9.2Less than 400 30.5�� 21.4 25.7 S 23.4 S S 11.7 S400 to 599 11.3�� 24.5 87.6 12.3 26.4 58.2 4.9 15.4 10.0600 to 799 4.2�� 5.9 8.8 5.5 7.6 12.0 3.4 4.5 5.9800 or more 6.2�� 7.2 7.7 8.1 10.7 9.6 5.3 6.1 7.0Not available 12.4�� 8.1 5.9 16.8 14.3 9.0 11.6 11.5 16.9

Other fuel 37.8�� S S 39.4 S S 16.2 S SLess than 400 39.3�� S S 41.3 S S 16.9 S S400 or more 47.6�� S S S S S S S SNot available S�� S S S S S S S S

Not reported N�� N N N N N N N NNot applicable1 23.6�� N N S N N S N N






trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

REFUELING LOCATION

Gas station 1.9�� N N 4.3 N N 3.9 N NTruck stop 34.8�� N N 19.6 N N 18.3 N NOwn facility (including home, farm, ranch, onsiteby mobile supplier, etc.) 19.2�� N N 8.4 N N 12.6 N N


Other N�� N N N N N N N NNot reported 23.1�� N N 24.3 N N 9.4 N NNot applicable1 23.6�� N N S N N S N N

MAINTENANCE

General maintenance performed by:None performed 39.0�� 43.7 95.8 S S S S S SCompany�owned maintenance facility 9.3�� 12.8 27.5 8.9 13.9 19.0 4.5 7.8 6.0General repair business or private mechanic 5.7�� 5.7 10.2 6.7 7.3 12.3 4.2 5.1 6.4Dealership service department 7.7�� 7.7 13.3 9.0 8.8 17.3 5.6 4.5 8.0Leasing company S�� 44.6 S 44.5 34.3 11.9 S 12.0 S

Individual not employed/paid by anymaintenance type facility 7.0�� 4.2 5.6 10.9 6.8 7.9 8.5 5.5 9.1

Other N�� S S N S S N S SNot reported 22.0�� 18.7 34.4 23.4 19.0 28.7 8.9 11.4 11.6Not applicable1 23.6�� N N S N N S N N

Extensive repairs performed by:None performed 2.8�� 16.9 252.2 4.1 22.4 298.9 3.1 14.4 13.2Company�owned maintenance facility 24.7�� 17.0 14.7 19.2 15.4 7.3 10.8 7.9 8.1General repair business or private mechanic 16.6�� 8.4 7.8 19.1 10.4 10.7 10.8 6.3 14.7Dealership service department 26.5�� 10.1 6.1 32.4 11.0 11.5 19.7 5.8 32.3Leasing company S�� 47.8 S S 21.9 S S 29.8 S

Component distributorship (engine,transmission, body, etc.) S�� 25.2 S S 19.5 S S 14.8 S

Individual not employed/paid by any repair typefacility 19.5�� 11.5 12.3 24.8 14.4 10.2 16.3 8.8 12.1

Other N�� 47.4 N N S S N S SNot reported S�� 4.3 S S 6.5 S S 4.9 SNot applicable1 23.6�� N N S N N S N N


Single�unit trucks and truck�tractors withouttrailer 1.2�� 1.2 1.8 3.7 3.4 5.1 3.5 3.1 4.42 axles 1.2�� 1.2 1.8 3.8 3.5 5.2 3.6 3.1 4.53 axles 7.0�� 8.3 12.4 12.2 10.8 13.8 9.9 9.3 10.04 axles 30.9�� 10.8 5.6 42.5 11.9 5.9 29.2 5.0 23.45 axles or more 12.7�� N N 13.9 N N 5.7 N NNot reported 49.1�� N N S N S S N S

Combinations 20.7�� 15.9 33.9 17.1 12.3 22.8 16.4 11.4 16.7Single�unit trucks with trailer 34.0�� 30.7 70.1 S 42.1 S S 29.4 S

3 axles S�� 49.4 S S S S S S S4 axles 40.9�� 44.2 146.1 S 35.6 S S 29.4 S5 axles or more S�� 16.8 S S 28.8 S S 16.8 SNot reported S�� N N S N N S N N

Truck�tractors with single trailer 3.1�� 5.1 7.9 3.9 8.0 12.6 3.1 4.7 6.03 axles 28.2�� 19.1 28.0 48.2 35.9 45.3 30.3 21.7 34.24 axles 19.7�� 15.4 19.7 23.9 23.4 22.0 15.9 16.2 18.85 axles or more 3.3�� 6.2 9.5 4.3 8.9 14.5 2.8 4.7 5.9Not reported 16.5�� N N 20.0 N N 11.3 N N

Truck�tractors with double trailers 22.8�� 11.1 10.8 29.3 12.9 11.2 12.2 4.1 10.65 axles 27.4�� 20.6 56.6 32.4 23.2 92.9 11.2 10.7 21.96 axles 40.1�� 15.1 7.8 S 16.4 S S 6.3 S7 axles S�� 22.0 S S 23.7 S S 3.8 S8 axles or more S�� S S S S S S S SNot reported N�� N N N N N N N N

Truck�tractors with triple trailers N�� 19.3 N N 18.6 N N 9.1 N7 axles N�� S S N S S N S S8 axles N�� 26.0 N N 26.7 N N 6.0 N9 axles N�� 25.2 N N 24.1 N N 12.3 N10 axles or more N�� N N N N N N N NNot reported N�� N N N N N N N N

Driving axles:1 3.3�� 3.1 5.1 5.5 5.2 7.8 4.4 4.2 5.52 6.5�� 5.1 8.1 8.0 5.9 9.8 5.7 3.7 6.83 or more S�� 30.8 S S 34.8 S S 16.1 SNot reported 37.0�� N N S N S S N S

Total liftable axles and locations:None 1.0�� 5.4 31.6 2.4 8.3 32.2 2.3 6.4 4.41 25.2�� 25.2 20.8 38.4 31.9 36.0 28.9 25.4 47.6

Forward of the drive axle 40.1�� N N S N N S N NBelow the chassis 49.1�� N N S N N S N NBeyond the chassis S�� N N S N N S N NNot reported S�� N N S N N S N N

2 or more 12.7�� 15.0 21.0 13.9 16.8 18.7 5.7 11.3 10.2Forward of the drive axle 13.1�� N N 14.4 N N 6.0 N NBelow the chassis S�� N N S N N S N NBeyond the chassis 13.7�� N N 15.0 N N 6.1 N NNot reported S�� N N S N N S N N

Not reported 43.8�� N N S N N S N NNot applicable8 1.1�� N N 4.1 N N 3.9 N N






trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

TRUCK TYPE AND AXLEARRANGEMENT�Con.

Total liftable axles and number of braking axles:None 1.0�� 5.4 31.6 2.4 8.3 32.2 2.3 6.4 4.41 25.2�� 25.2 20.8 38.4 31.9 36.0 28.9 25.4 47.6

0 braking S�� N N S N N S N N1 braking 27.1�� N N 41.4 N N 31.3 N NNot reported S�� N N S N N S N N

2 or more 12.7�� 15.0 21.0 13.9 16.8 18.7 5.7 11.3 10.20 braking N�� N N N N N N N N1 braking N�� N N N N N N N N2 or more braking 12.8�� N N 14.1 N N 5.9 N NNot reported S�� N N S N N S N N

Not reported 43.8�� N N S N N S N NNot applicable8 1.1�� N N 4.1 N N 3.9 N N

CAB TYPE

Conventional cab 1.2�� 2.7 6.3 2.8 4.5 6.2 2.6 3.7 2.4With sleeper 7.2�� N N 8.6 N N 4.6 N NWithout sleeper 1.2�� N N 3.2 N N 2.9 N NNot reported 24.4�� N N 28.2 N N 14.1 N N

Cab over engine 4.7�� 8.2 11.4 6.4 11.7 29.6 4.9 8.1 17.4With sleeper 7.5�� N N 8.5 N N 4.3 N NWithout sleeper 6.4�� N N 8.7 N N 6.3 N NNot reported 43.8�� N N 44.5 N N 7.4 N N

Cab forward of engine S�� 17.3 S S 22.2 S S 15.2 SCab beside engine N�� 44.7 N N 49.1 N N 23.5 NNot reported 43.8�� N N S N N S N NNot applicable8 1.1�� N N 4.1 N N 3.9 N N


1Vehicles not in use. When the respondent had partial�year ownership of the vehicle, annual miles were adjusted to reflect miles traveled when not owned by the respondent.2Truck�tractors not in use.3Lessees or lessors of pickups, minivans, other light vans, and sport utilities.4Includes pickups, minivans, other light vans, and sport utilities; all other vehicles that are private, rental, or used for personal transportation; and vehicles not in use.5Distributed miles data are available in Table 8.6Includes pickups, minivans, other light vans, and sport utilities; all other vehicles that are rental or used for personal transportation; and vehicles not in use.7Pickups, minivans, other light vans, and sport utilites, in the Equipment Type section, were only required to report for aerial work platform/bucket, air bag(s), air�conditioning, antilock brake

system, computerized drive train control unit, front�wheel drive, mounting bar for snowplow, radial tires, toolbox, trip recorder, vehicle control aids for handicapped drivers, wheelchair lift, and winch.8Pickups, minivans, other light vans, and sport utilities.9Data were derived from administrative records.


Table 3a. Trucks, Truck Miles, and Average Annual Miles for Trucks, Excluding Pickups,Minivans, Other Light Vans, and Sport Utilities: 2002 and 1997

[Estimates are based on data from the 2002 and 1997 Vehicle Inventory and Use Surveys. Because of rounding, estimates may not be additive]



Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

Total 122.8�� 71.3 72.2 2 549.7 2 123.6 20.1 20.8 29.8 –30.3

BUSINESS1

For�hire transportation or warehousing 10.7�� 10.5 1.9 802.1 764.3 4.9 74.7 72.5 3.0Vehicle leasing or rental 62.6�� 5.0 1 141.6 789.2 154.5 410.8 12.6 30.7 –58.9Agriculture, forestry, fishing, or hunting 2.3�� 3.4 –33.5 49.4 62.7 –21.2 21.6 18.2 18.4Mining .8�� 1.7 –54.1 14.0 27.1 –48.4 17.8 15.8 12.4Utilities 3.3�� 2.3 42.0 58.9 34.4 71.5 18.0 14.9 20.7

Construction 15.5�� 20.9 –26.0 304.7 400.8 –24.0 19.7 19.2 2.7Manufacturing 2.3�� 2.4 –4.6 34.5 59.8 –42.3 15.1 25.0 –39.5Wholesale trade 4.1�� 6.2 –33.1 120.2 185.9 –35.3 29.1 30.1 –3.4Retail trade 4.8�� 6.3 –22.5 130.2 194.3 –33.0 26.9 31.0 –13.4Information services S�� N N S N N S N N


Arts, entertainment, or recreation services .8�� N N 8.2 N N 9.7 N NAccommodation or food services .5�� N N 15.8 N N 33.5 N NOther services 1.5�� N N 14.3 N N 9.4 N NPersonal transportation V�� 2.6 N V 10.4 N V 4.0 NNot reported 5.1�� V N 129.0 V N 25.1 V NNot applicable2 5.2�� 1.8 191.8 7.7 S S 1.5 S S

BODY TYPE

Single�unit trucks 105.2�� 55.2 90.7 1 386.9 966.1 43.6 13.2 17.5 –24.7Armored V�� N N V N N V N NBeverage .7�� .7 –9.7 S 7.9 S S 10.9 SConcrete mixer 1.6�� 1.9 –11.7 36.9 45.8 –19.4 22.5 24.7 –8.8Concrete pumper .2�� N N S N N S N NCrane S�� 1.0 S S 11.0 S S 10.7 S

Curtainside S�� N N V N N S N NDump 4.9�� 5.7 –14.4 73.1 85.8 –14.8 15.0 15.1 –.4Flatbed, stake, or platform 12.1�� 15.9 –23.6 156.5 211.8 –26.1 12.9 13.3 –3.2Low boy V�� .4 N V 9.7 N V 24.0 NPole, logging, pulpwood, or pipe V�� .1 N V S S V S S

Service, utility 4.0�� 1.4 186.6 56.7 S S 14.1 S SService, other 2.9�� 5.0 –41.0 43.6 85.4 –48.9 14.9 17.2 –13.4Street sweeper S�� N N S N N S N NTank, dry bulk .1�� V N S V S S V STank, liquids or gases 2.9�� 2.3 28.3 31.2 34.7 –10.2 10.7 15.3 –30.0

Tow/Wrecker 1.2�� 1.6 –27.6 17.8 41.4 –57.0 15.0 25.3 –40.7Trash, garbage, or recycling 1.3�� 1.0 24.1 26.0 30.4 –14.4 20.1 29.2 –31.0Vacuum S�� N N S N N S N NVan, basic enclosed 67.2�� 7.2 838.4 837.9 175.8 376.5 12.5 24.6 –49.2Van, insulated nonrefrigerated S�� S S S S S S S S

Van, insulated refrigerated 1.4�� 1.1 24.7 31.0 32.6 –5.1 22.5 29.6 –23.9Van, open top S�� S S S S S S S SVan, step, walk�in, or multistop 3.1�� 8.0 –61.0 46.8 133.3 –64.9 15.0 16.6 –9.9Van, other .6�� N N S N N S N NOther V�� N N V N N V N N

Truck�tractors 17.5�� 16.1 9.0 1 162.8 1 157.5 .5 66.3 71.9 –7.8Automobile carrier .2�� .1 51.8 S S S S S SBeverage .4�� .3 41.1 4.9 3.1 56.6 11.0 9.9 11.0Curtainside V�� N N V N N V N NDump 2.0�� 1.6 25.6 95.1 74.9 26.9 48.6 48.1 1.1Flatbed, stake, or platform 2.3�� 1.7 34.6 99.7 98.0 1.7 42.7 56.5 –24.5

Livestock S�� S S S S S S S SLow boy .3�� .6 –53.9 20.1 31.4 –36.0 70.9 51.0 38.9Mobile home toter S�� N N S N N S N NOpen top .2�� .1 112.5 8.2 S S 37.2 S SPole, logging, pulpwood, or pipe V�� S S V S S V S S

Tank, dry bulk .5�� .4 29.7 36.0 28.9 24.3 76.3 79.6 –4.2Tank, liquids or gases .6�� .7 –19.0 39.8 50.3 –20.8 70.1 71.7 –2.2Van, basic enclosed 8.5�� 8.0 6.7 720.8 669.8 7.6 84.9 84.2 .9Van, drop�frame .2�� .2 –32.5 S 8.5 S S 36.5 SVan, insulated nonrefrigerated S�� V S S V S S V S

Van, insulated refrigerated 1.5�� 2.1 –28.0 111.4 176.3 –36.8 73.6 83.9 –12.2Other S�� N N S N N S N NNot applicable3 .7�� N N V N N V N N

ANNUAL MILES

Less than 5,000 13.6�� 9.9 37.5 33.2 18.2 81.9 2.4 1.8 32.35,000 to 9,999 30.5�� 8.5 260.6 230.5 58.2 295.8 7.6 6.9 9.810,000 to 19,999 38.8�� 19.0 103.7 539.5 261.7 106.2 13.9 13.7 1.220,000 to 29,999 15.9�� 10.8 47.4 375.6 250.3 50.0 23.6 23.2 1.830,000 to 49,999 6.3�� 7.8 –18.8 233.3 276.0 –15.5 37.0 35.5 4.1

50,000 to 74,999 3.9�� 4.8 –18.6 229.6 281.8 –18.6 59.2 59.2 .175,000 or more 8.5�� 9.0 –5.6 900.4 977.3 –7.9 106.5 109.2 –2.4Not applicable2 5.2�� 1.5 239.2 7.7 V N 1.5 V N



Table 3a. Trucks, Truck Miles, and Average Annual Miles for Trucks, Excluding Pickups,Minivans, Other Light Vans, and Sport Utilities: 2002 and 1997�Con.




Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I


Off�the�road 2.5�� 4.0 –37.0 31.3 28.2 10.8 12.5 7.1 75.950 miles or less 46.2�� 34.7 33.0 739.2 619.8 19.3 16.0 17.8 –10.351 to 100 miles 23.1�� 12.7 82.6 327.9 386.8 –15.2 14.2 30.6 –53.6101 to 200 miles 6.1�� 6.3 –3.8 171.4 264.6 –35.2 28.1 41.7 –32.6201 to 500 miles 11.3�� 8.7 30.1 255.9 549.5 –53.4 22.6 63.2 –64.2

501 miles or more 21.4�� 3.3 543.1 808.6 274.8 194.3 37.8 82.5 –54.2Not reported 6.9�� 1.5 347.0 207.8 V N 30.2 V NNot applicable2 5.2�� N N 7.7 N N 1.5 N N


Operated in Canada .8�� N N 9.5 N N 12.1 N NOperated in Mexico S�� N N S N N S N NOperated within the home base state 66.8�� N N 1 217.2 N N 18.2 N NOperated in states other than the home basestate 41.9�� N N 1 100.1 N N 26.3 N N

Not reported 8.0�� N N 214.6 N N 26.8 N NNot applicable2 5.2�� N N 7.7 N N 1.5 N N

MONTHS OPERATED

12 95.0�� N N 2 022.9 N N 21.3 N N7 to 11 12.2�� N N 390.6 N N 32.0 N N2 to 6 7.9�� N N 117.2 N N 14.8 N N1 or less 2.4�� N N 11.3 N N 4.7 N NVehicle not used 5.2�� N N 7.7 N N 1.5 N N

VEHICLE SIZE

Light 13.6�� 19.3 –29.7 155.0 269.4 –42.5 11.4 13.9 –18.2Medium 65.2�� 14.5 350.6 787.8 235.2 234.9 12.1 16.2 –25.7Light�heavy 15.8�� 9.6 64.5 254.6 204.0 24.8 16.1 21.2 –24.1Heavy�heavy 28.1�� 27.8 .9 1 352.3 1 415.0 –4.4 48.2 50.9 –5.3


Less than 6,001 6.5�� 3.9 67.4 74.0 50.2 47.6 11.4 12.9 –11.86,001 to 8,500 3.7�� N N 30.0 N N 8.2 N N8,501 to 10,000 3.4�� N N 51.0 N N 14.8 N N10,001 to 14,000 34.0�� 8.6 294.0 384.7 125.7 206.0 11.3 14.6 –22.314,001 to 16,000 3.3�� 3.2 3.0 63.1 63.4 –.5 19.4 20.1 –3.5

16,001 to 19,500 28.0�� 2.7 939.4 340.1 46.1 637.0 12.1 17.1 –29.119,501 to 26,000 15.8�� 9.6 64.5 254.6 204.0 24.8 16.1 21.2 –24.126,001 to 33,000 3.1�� 4.7 –33.8 49.3 76.4 –35.4 15.9 16.3 –2.533,001 to 40,000 1.9�� 5.3 –63.3 33.3 410.7 –91.9 17.1 77.5 –77.940,001 to 50,000 3.4�� 3.4 –.1 86.5 141.3 –38.8 25.4 41.5 –38.7

50,001 to 60,000 3.2�� 3.8 –16.7 77.3 149.2 –48.2 24.5 39.4 –37.860,001 to 80,000 16.3�� 10.6 54.2 1 087.5 633.6 71.6 66.8 60.0 11.380,001 to 100,000 S�� .1 S S S S S S S100,001 to 130,000 S�� V S S V S S V S130,001 or more S�� V S S V S S V S

TOTAL LENGTH (FEET)

Less than 20.0 25.8�� 22.4 15.5 340.2 350.4 –2.9 13.2 15.7 –15.920.0 to 27.9 41.0�� 19.6 109.5 481.7 287.1 67.8 11.8 14.7 –19.928.0 to 35.9 33.9�� 8.1 319.5 459.2 180.0 155.1 13.6 22.3 –39.236.0 to 40.9 4.1�� 2.6 57.2 112.5 73.0 54.0 27.1 27.7 –2.041.0 to 44.9 1.5�� 1.4 13.2 50.5 26.2 92.5 32.8 19.3 70.0

45.0 to 49.9 .7�� 1.2 –40.9 26.9 28.9 –6.9 38.9 24.7 57.650.0 to 54.9 1.9�� 2.3 –17.9 67.1 120.1 –44.2 36.2 53.3 –32.055.0 to 59.9 1.8�� 3.5 –48.0 80.1 199.1 –59.8 43.8 56.6 –22.660.0 to 64.9 3.8�� 3.5 7.4 199.8 214.5 –6.9 53.2 61.4 –13.365.0 to 69.9 1.6�� 1.9 –15.1 103.9 141.3 –26.5 64.5 74.6 –13.5

70.0 to 74.9 6.2�� 1.3 391.7 596.2 112.0 432.4 96.9 89.5 8.375.0 to 79.9 .3�� N N 24.4 N N 70.3 N N80.0 or more .1�� N N S N N S N N

MILES PER GALLON

Less than 5 5.9�� 6.1 –2.2 145.1 199.2 –27.2 24.4 32.8 –25.55 to 6.9 12.3�� 21.1 –42.0 541.9 1 071.9 –49.4 44.2 50.7 –12.87 to 8.9 30.0�� 12.6 138.8 859.6 338.7 153.8 28.7 27.0 6.39 to 10.9 42.8�� 10.6 304.3 491.0 170.1 188.6 11.5 16.0 –28.611 to 12.9 5.6�� 5.2 8.4 94.3 77.4 21.9 16.9 15.0 12.413 to 14.9 7.9�� 2.1 284.3 108.6 40.0 171.3 13.8 19.5 –29.415 or more 2.5�� 5.4 –53.5 35.1 84.1 –58.3 13.8 15.5 –10.4

15 to 20.9 2.5�� 5.4 –53.5 35.1 84.1 –58.3 13.8 15.5 –10.421 to 24.9 V�� V N V V N V V N25 or more V�� V N V V N V V N

Not reported 10.5�� 8.3 27.1 266.4 142.0 87.5 25.4 17.2 47.6Not applicable2 5.2�� N N 7.7 N N 1.5 N N







Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

MODEL YEAR

2003 .7�� N N 58.6 N N 80.7 N N2002 4.7�� N N 403.0 N N 85.3 N N2001 3.8�� N N 184.6 N N 49.0 N N2000 11.8�� N N 319.5 N N 27.1 N N1999 3.8�� N N 132.5 N N 34.9 N N

1998 4.6�� S S 150.6 S S 32.5 S S1997 4.2�� 5.2 –18.0 114.4 295.3 –61.3 27.1 57.3 –52.81996 3.6�� 5.8 –38.0 109.0 299.8 –63.6 30.5 52.0 –41.41995 6.0�� 5.4 12.7 133.2 221.9 –40.0 22.0 41.4 –46.71994 6.7�� 4.4 51.8 130.6 223.3 –41.5 19.5 50.7 –61.51993 6.4�� 4.0 60.8 107.1 122.2 –12.4 16.8 30.8 –45.5Pre�1993 66.4�� 46.2 43.8 706.7 934.1 –24.3 10.6 20.2 –47.4

VEHICLE ACQUISITION

New 89.6�� 31.1 188.1 1 909.7 941.7 102.8 21.3 30.3 –29.6Used 29.0�� 30.7 –5.5 558.1 636.5 –12.3 19.2 20.7 –7.2Not reported 4.1�� 9.5 –56.4 81.9 545.4 –85.0 19.8 57.6 –65.5



Vehicle only 9.8�� N N 410.8 N N 41.9 N NVehicle with driver S�� N N S N N S N NNot reported V�� N N V N N V N N

Lessor 5.5�� N N 240.7 N N 43.8 N NVehicle only 5.4�� N N 226.1 N N 42.1 N NVehicle with driver .1�� N N S N N S N NNot reported V�� N N V N N V N N

Not reported .5�� N N 16.1 N N 30.2 N NNot leased 91.3�� N N 1 607.1 N N 17.6 N NNot reported 15.6�� N N 272.6 N N 17.4 N N


1 to 11 months .8�� N N 26.0 N N 31.9 N N12 months or more 14.6�� N N 634.9 N N 43.3 N NNot reported S�� N N S N N S N N

Provisions of lease4:Financing only 12.1�� N N 511.7 N N 42.4 N NFull maintenance 4.0�� N N 176.2 N N 43.5 N NPayment of taxes 5.4�� N N 224.3 N N 41.3 N NObtaining licenses and permits 4.9�� N N 207.4 N N 42.4 N NRecordkeeping 4.4�� N N 283.0 N N 64.3 N NFuel contract 1.6�� N N 54.4 N N 34.8 N N


Private 39.5�� N N 768.4 N N 19.5 N NMotor carrier 11.9�� N N 818.5 N N 68.8 N NOwner operator 3.2�� N N 156.5 N N 48.8 N NRental 63.0�� N N 798.6 N N 12.7 N NPersonal transportation V�� N N V N N V N NNot applicable2 5.2�� N N 7.7 N N 1.5 N N


Contract 8.4�� N N 678.7 N N 80.7 N NCommon 5.5�� N N 253.5 N N 46.4 N NNot reported 1.2�� N N 42.8 N N 34.9 N NNot applicable5 107.7�� N N 1 574.8 N N 14.6 N N

Type of service:Truckload 10.3�� 6.6 56.3 782.2 597.4 30.9 75.9 90.6 –16.2Less�than truckload 3.1�� 3.5 –11.2 141.2 135.5 4.2 45.0 38.4 17.2Not reported 1.7�� N N 51.5 N N 31.0 N NNot applicable5 107.7�� N N 1 574.8 N N 14.6 N N

Source of hauls:Shippers or receivers 10.7�� N N 804.0 N N 74.9 N NBrokers .8�� N N 62.3 N N 78.9 N NCentralized markets or exchanges .4�� N N 14.8 N N 39.0 N NOther V�� N N V N N V N NNot reported 3.2�� N N 93.9 N N 29.3 N NNot applicable5 107.7�� N N 1 574.8 N N 14.6 N N


Carrying hazardous materials 3.2�� 6.9 –53.8 132.8 495.3 –73.2 41.9 72.2 –42.0Not carrying hazardous materials 45.1�� 51.4 –12.3 1 434.3 1 291.1 11.1 31.8 25.1 26.6Not reported 6.3�� 13.0 –51.4 176.3 337.2 –47.7 27.8 25.9 7.6Not applicable7 68.2�� N N 806.4 N N 11.8 N N

EQUIPMENT TYPE4

Aerial work platform/bucket 1.2�� N N S N N S N NAir bag(s) (safety device only) 11.1�� 8.1 36.9 597.5 588.7 1.5 53.9 72.7 –25.9Air compressor (except air brakes) 4.5�� N N 150.7 N N 33.1 N NAir�conditioning 103.6�� 39.0 165.5 2 330.3 1 689.9 37.9 22.5 43.3 –48.1Air springs 22.0�� N N 949.0 N N 43.1 N N







Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

EQUIPMENT TYPE4�Con.

Antilock brake system 48.8�� 11.5 323.9 1 377.6 606.3 127.2 28.2 52.6 –46.4Collision warning system .6�� N N 14.4 N N 25.6 N NComputerized drive train control unit 2.4�� N N 86.8 N N 36.8 N NCrane 1.0�� N N 19.0 N N 18.4 N NElectronic vehicle identification device 1.4�� 4.1 –66.3 83.2 428.7 –80.6 60.2 104.4 –42.4

Engine retarder/brake 15.0�� 13.7 8.8 960.5 970.5 –1.0 64.2 70.6 –9.1Front�wheel drive V�� V N V V N V V NHoist 2.2�� N N 35.3 N N 15.8 N NIdle�reducing technology (portable auxiliary pack,electrification, etc.) 5.4�� N N 472.3 N N 87.1 N N

Internet access .2�� N N 17.8 N N 112.7 N N

Lift gate 4.8�� N N 91.5 N N 19.0 N NMounting bar for snowplow S�� N N S N N S N NNavigational system .2�� S S 6.6 S S 34.7 S SPower take�off 11.5�� N N 289.4 N N 25.2 N NRadial tires 98.9�� 49.3 100.6 2 146.6 1 785.5 20.2 21.7 36.2 –40.1

Reflective material in addition to those requiredby law 10.8�� 14.4 –25.0 644.8 802.3 –19.6 59.6 55.6 7.2

Road speed governor 51.9�� 19.6 164.8 1 404.8 1 014.5 38.5 27.0 51.7 –47.7Toolbox 18.3�� N N 407.7 N N 22.2 N NTrip recorder or on�board computer withcommunication capabilities 6.5�� N N 581.0 N N 89.4 N N


Vehicle control aids for handicapped drivers V�� V N V V N V V NWheelchair lift V�� V N V V N V V NWinch 1.6�� N N 32.8 N N 20.5 N N

Transmission type:Automatic 64.3�� N N 850.4 N N 13.2 N NManual 53.5�� N N 1 544.9 N N 28.9 N NSemiautomated manual S�� N N S N N S N NAutomated manual S�� N N S N N S N NNot reported 4.7�� N N 137.9 N N 29.2 N N

Braking system:Hydraulic (standard) 14.8�� 14.1 5.6 203.8 204.0 –.1 13.7 14.5 –5.3Hydraulic with power assist 74.7�� 21.0 256.3 906.2 350.9 158.2 12.1 16.7 –27.5Air 28.1�� 28.2 –.3 1 298.3 1 422.8 –8.7 46.1 50.4 –8.5Other V�� 1.2 N V 21.6 N V 18.7 NNot reported 5.1�� N N 141.4 N N 27.7 N N


Fuel type:Gasoline 39.6�� 25.3 56.7 512.2 329.2 55.6 12.9 13.0 –.7Diesel 76.4�� 42.9 78.1 2 006.7 1 755.2 14.3 26.3 40.9 –35.8Natural gas V�� N N V N N V N NPropane .8�� N N 16.2 N N 19.2 N NAlcohol fuels V�� N N V N N V N N

Electricity V�� N N V N N V N NCombination .7�� N N 6.9 N N 10.6 N NOther V�� N N V N N V N NNot reported V�� N N V N N V N NNot applicable2 5.2�� N N 7.7 N N 1.5 N N

Cylinders8:4 cylinders 3.0�� 3.0 –1.8 62.5 63.6 –1.8 20.9 20.9 V6 cylinders 40.3�� 31.1 29.6 1 556.4 1 504.2 3.5 38.7 48.4 –20.28 cylinders 72.1�� 25.7 180.6 860.7 398.8 115.8 11.9 15.5 –23.1Other 7.4�� 11.5 –35.8 70.2 157.0 –55.3 9.5 13.7 –30.4

Cubic inch displacement8:Gasoline fuel 39.6�� 25.3 56.7 512.2 329.2 55.6 12.9 13.0 –.7

Less than 200 6.7�� .5 1 240.9 78.4 S S 11.7 S S200 to 299 S�� 1.3 S S 22.1 S S 17.7 S300 to 349 .9�� .6 55.1 S 6.4 S S 10.6 S350 to 399 15.9�� 10.1 57.2 175.9 144.4 21.8 11.1 14.3 –22.5400 or more 14.0�� 6.6 112.6 238.9 108.8 119.5 17.0 16.5 3.2Not available 1.9�� 6.2 –69.4 5.3 37.7 –85.8 2.8 6.1 –53.8

Diesel fuel 76.4�� 42.9 78.1 2 006.7 1 755.2 14.3 26.3 40.9 –35.8Less than 400 6.7�� 8.8 –23.6 128.8 185.4 –30.5 19.1 21.0 –9.1400 to 599 48.2�� 10.0 383.6 603.6 229.0 163.5 12.5 23.0 –45.5600 to 799 12.9�� 10.5 22.6 856.8 674.1 27.1 66.4 64.0 3.7800 or more 6.2�� 7.5 –18.0 340.1 477.7 –28.8 55.0 63.3 –13.1Not available 2.4�� 6.1 –60.5 77.3 188.9 –59.1 32.3 31.2 3.5

Other fuel 1.5�� .8 93.1 23.1 16.5 40.1 15.4 21.3 –27.5Less than 400 .7�� S S 13.1 S S 20.0 S S400 or more .7�� S S S S S S S SNot available S�� S S S S S S S S

Not reported V�� N N V N N V N NNot applicable2 5.2�� N N 7.7 N N 1.5 N N

REFUELING LOCATION

Gas station 81.5�� N N 1 054.3 N N 12.9 N NTruck stop 7.1�� N N 345.0 N N 48.5 N NOwn facility (including home, farm, ranch, onsiteby mobile supplier, etc.) 22.7�� N N 996.9 N N 44.0 N N


Other V�� N N V N N V N NNot reported 1.8�� N N 36.8 N N 20.6 N NNot applicable2 5.2�� N N 7.7 N N 1.5 N N







Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

MAINTENANCE4

General maintenance performed by:None performed .8�� .4 107.6 S S S S S SCompany�owned maintenance facility 90.9�� 30.3 199.9 1 937.7 1 125.5 72.2 21.3 37.2 –42.6General repair business or private mechanic 24.8�� 18.8 31.9 1 003.0 736.8 36.1 40.5 39.2 3.2Dealership service department 10.9�� 6.8 61.6 628.5 254.7 146.8 57.5 37.6 52.7Leasing company 1.3�� 3.0 –57.8 29.0 156.4 –81.4 23.2 52.9 –56.1

Individual not employed/paid by anymaintenance type facility 7.0�� 16.0 –56.5 177.3 337.7 –47.5 25.4 21.1 20.6

Other V�� .4 N V 7.1 N V 17.8 NNot reported 1.3�� 8.5 –84.1 24.3 222.8 –89.1 18.0 26.3 –31.4Not applicable2 5.2�� N N 7.7 N N 1.5 N N

Extensive repairs performed by:None performed 91.5�� 1.3 7 156.9 1 926.7 18.1 10 522.0 21.1 14.4 46.4Company�owned maintenance facility 14.1�� 18.9 –25.5 222.2 537.4 –58.6 15.7 28.4 –44.5General repair business or private mechanic 5.1�� 15.3 –67.1 175.5 351.1 –50.0 34.8 22.9 51.7Dealership service department 3.0�� 11.7 –74.8 127.2 658.3 –80.7 43.1 56.3 –23.5Leasing company .6�� 2.6 –78.4 14.3 147.0 –90.3 25.4 56.4 –54.9

Component distributorship (engine,transmission, body, etc.) .7�� 5.8 –87.6 19.7 425.1 –95.4 27.4 73.2 –62.5

Individual not employed/paid by any repair typefacility .8�� 4.8 –83.7 31.0 79.2 –60.9 39.4 16.4 139.8

Other V�� .4 N V S S V S SNot reported S�� 20.4 S S 437.3 S S 21.4 SNot applicable2 5.2�� N N 7.7 N N 1.5 N N


Single�unit trucks and truck�tractors withouttrailer 103.8�� 49.7 108.6 1 332.6 823.4 61.8 12.8 16.6 –22.42 axles 96.6�� 43.5 122.0 1 208.0 690.1 75.1 12.5 15.9 –21.13 axles 5.0�� 4.4 14.4 72.8 86.1 –15.4 14.6 19.8 –26.14 axles .3�� 1.9 –83.0 6.3 47.1 –86.6 20.0 25.4 –21.25 axles or more 1.7�� N N 43.8 N N 25.3 N NNot reported .1�� V N S V S S V S

Combinations 19.0�� 21.5 –11.8 1 217.1 1 300.2 –6.4 64.0 60.3 6.1Single�unit trucks with trailer 2.2�� 5.4 –59.8 54.3 142.8 –62.0 24.8 26.2 –5.3

3 axles .6�� 1.2 –52.3 S 15.8 S S 13.4 S4 axles 1.3�� 2.9 –56.5 31.1 68.3 –54.5 24.3 23.2 4.55 axles or more .3�� 1.3 –78.7 15.1 58.6 –74.2 53.3 44.0 20.9Not reported S�� N N S N N S N N

Truck�tractors with single trailer 15.6�� 11.9 31.1 1 070.0 757.1 41.3 68.5 63.5 7.83 axles .9�� 1.1 –17.9 26.5 35.2 –24.7 29.1 31.7 –8.34 axles 1.4�� 1.8 –20.9 51.2 77.9 –34.3 35.3 42.6 –17.05 axles or more 12.2�� 9.0 35.7 945.5 644.0 46.8 77.6 71.7 8.2Not reported 1.1�� N N 46.9 N N 43.7 N N

Truck�tractors with double trailers 1.2�� 2.8 –57.6 92.7 264.1 –64.9 77.6 93.7 –17.35 axles .9�� .6 65.0 82.6 35.4 133.1 87.5 62.0 41.36 axles .2�� 1.0 –81.8 S 99.3 S S 95.6 S7 axles S�� 1.2 S S 124.5 S S 107.8 S8 axles or more S�� S S S S S S S SNot reported V�� N N V N N V N N

Truck�tractors with triple trailers V�� 1.4 N V 136.2 N V 100.0 N7 axles V�� S S V S S V S S8 axles V�� .4 N V 40.0 N V 110.1 N9 axles V�� 1.0 N V 96.1 N V 98.7 N10 axles or more V�� V N V V N V V NNot reported V�� N N V N N V N N

Driving axles:1 101.2�� 50.9 98.9 1 413.6 939.0 50.5 14.0 18.5 –24.32 21.3�� 20.2 5.9 1 134.2 1 163.4 –2.5 53.1 57.7 –7.93 or more S�� .3 S S 21.1 S S 81.4 SNot reported .2�� V N S V S S V S

Total liftable axles and locations9:None 120.4�� 20.5 488.2 2 495.2 666.1 274.6 20.7 32.5 –36.31 .5�� .8 –41.6 10.5 14.5 –27.9 22.1 17.9 23.6

Forward of the drive axle .2�� N N S N N S N NBelow the chassis .1�� N N S N N S N NBeyond the chassis S�� N N S N N S N NNot reported S�� N N S N N S N N

2 or more 1.7�� 1.6 6.9 43.8 51.0 –14.1 25.3 31.5 –19.6Forward of the drive axle 1.6�� N N 41.4 N N 25.3 N NBelow the chassis S�� N N S N N S N NBeyond the chassis 1.5�� N N 37.5 N N 25.3 N NNot reported S�� N N S N N S N N

Not reported .2�� N N S N N S N N

Total liftable axles and number of braking axles:None 120.4�� 20.5 488.2 2 495.2 666.1 274.6 20.7 32.5 –36.31 .5�� .8 –41.6 10.5 14.5 –27.9 22.1 17.9 23.6

0 braking S�� N N S N N S N N1 braking .4�� N N 9.6 N N 23.4 N NNot reported S�� N N S N N S N N

2 or more 1.7�� 1.6 6.9 43.8 51.0 –14.1 25.3 31.5 –19.60 braking V�� N N V N N V N N1 braking V�� N N V N N V N N2 or more braking 1.7�� N N 42.9 N N 25.2 N NNot reported S�� N N S N N S N N

Not reported .2�� N N S N N S N N







Percentchange

2002 truckmiles

(millions)

1997 truckmiles



truck(thousands)


truck(thousands)

Percentchange

A B C D E F G H I

CAB TYPE

Conventional cab 110.4�� 51.9 112.7 1 963.3 1 704.8 15.2 17.8 32.8 –45.9With sleeper 4.6�� N N 339.2 N N 74.1 N NWithout sleeper 105.4�� N N 1 596.9 N N 15.2 N NNot reported .5�� N N 27.2 N N 53.9 N N

Cab over engine 11.9�� 9.9 20.9 580.7 260.8 122.7 48.7 26.5 84.3With sleeper 4.3�� N N 406.3 N N 94.6 N NWithout sleeper 7.5�� N N 158.5 N N 21.2 N NNot reported .2�� N N 15.9 N N 100.5 N N

Cab forward of engine S�� 2.6 S S 46.3 S S 17.8 SCab beside engine V�� .5 N V 2.8 N V 6.3 NNot reported .2�� N N S N N S N N


1Comparability of estimates may vary across survey years due to changes in category definitions.2Vehicles not in use. When the respondent had partial�year ownership of the vehicle, annual miles were adjusted to reflect miles traveled when not owned by the respondent.3Truck�tractors not in use.4Detail lines do not add to total trucks because items were not applicable or multiple responses were possible.5Vehicles that are private, rental, or used for personal transportation; and vehicles not in use.6Distributed miles data are available in Table 8.7Vehicles that are rental or used for personal tranportation; and vehicles not in use.8Data were derived from administrative records.9Detail lines do not add to the subtotal line because items were not applicable or multiple responses were possible. When 2 or 3 liftable axles were indicated, respondents properly reported



Note: Table 3b provides estimated measures of sampling variability. The Introduction gives information on confidentiality protection, sampling error, nonsampling error, sample design, anddefinitions. Links to this information on the Internet may be found at www.census.gov/svsd/www/02vehinv.html.


Table 3b. Trucks, Truck Miles, and Average Annual Miles for Trucks, Excluding Pickups,Minivans, Other Light Vans, and Sport Utilities�Measures of Sampling Variability:2002 and 1997



trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

Total .9�� 2.0 3.8 2.3 3.8 5.4 2.2 3.1 2.7

BUSINESS

For�hire transportation or warehousing 6.6�� 7.3 10.0 6.2 7.0 9.8 4.7 5.2 7.3Vehicle leasing or rental 3.1�� 13.9 177.0 4.0 14.5 76.8 2.6 10.8 4.6Agriculture, forestry, fishing, or hunting 19.7�� 13.9 16.0 21.2 17.8 21.8 16.9 14.6 26.5Mining 26.4�� 20.9 15.4 36.9 28.2 23.9 19.4 22.1 33.1Utilities 20.2�� 18.9 39.3 23.2 23.9 57.1 16.7 13.8 26.2

Construction 7.6�� 5.4 6.9 8.5 7.4 8.5 6.3 5.3 8.4Manufacturing 20.6�� 16.6 25.2 20.2 18.6 15.8 15.5 12.0 11.9Wholesale trade 15.0�� 12.2 12.9 15.3 16.4 14.5 10.5 11.3 15.0Retail trade 15.1�� 12.7 15.3 17.5 18.1 16.9 13.0 14.2 16.7Information services S�� N N S N N S N N


Arts, entertainment, or recreation services 38.0�� N N 43.7 N N 37.9 N NAccommodation or food services 38.9�� N N 36.1 N N 37.2 N NOther services 27.7�� N N 28.6 N N 19.2 N NPersonal transportation N�� 17.6 N N 34.1 N N 28.6 NNot reported 14.4�� N N 13.7 N N 11.7 N NNot applicable1 13.9�� 19.9 70.8 33.8 S S 29.1 S S

BODY TYPE

Single�unit trucks 1.2�� 2.4 5.1 2.8 4.7 7.8 2.6 3.8 3.5Armored N�� N N N N N N N NBeverage 47.6�� 36.2 53.9 S 42.8 S S 30.1 SConcrete mixer 13.0�� 10.9 15.0 14.8 12.6 15.7 7.1 6.5 8.7Concrete pumper 40.0�� N N S N N S N NCrane S�� 26.8 S S 31.0 S S 15.9 S

Curtainside S�� N N N N N S N NDump 13.4�� 10.4 14.5 20.3 12.8 20.4 17.0 10.5 19.9Flatbed, stake, or platform 9.7�� 7.2 9.2 12.2 10.3 11.8 8.4 6.8 10.4Low boy N�� 44.4 N N 40.4 N N 17.1 NPole, logging, pulpwood, or pipe N�� 49.0 N N S S N S S

Service, utility 19.0�� 24.8 89.5 25.6 S S 16.8 S SService, other 21.3�� 13.0 14.7 27.6 16.6 16.5 18.5 10.3 18.4Street sweeper S�� N N S N N S N NTank, dry bulk 49.1�� N N S N S S N STank, liquids or gases 18.7�� 17.2 32.6 26.7 22.8 31.5 23.8 16.6 20.3

Tow/Wrecker 34.8�� 32.3 34.4 49.8 37.0 26.6 36.1 23.0 25.4Trash, garbage, or recycling 18.5�� 17.1 31.2 21.3 19.0 24.4 17.7 14.4 15.7Vacuum S�� N N S N N S N NVan, basic enclosed 2.9�� 10.2 99.4 4.1 15.9 78.3 2.9 11.3 5.9Van, insulated nonrefrigerated S�� S S S S S S S S

Van, insulated refrigerated 30.5�� 28.2 51.8 30.6 34.8 44.0 8.8 17.8 15.1Van, open top S�� S S S S S S S SVan, step, walk�in, or multistop 20.6�� 13.0 9.5 24.7 15.3 10.2 15.2 7.3 15.2Van, other 48.7�� N N S N N S N NOther N�� N N N N N N N N

Truck�tractors 3.0�� 4.1 5.5 4.1 6.0 7.3 3.1 3.4 4.2Automobile carrier 43.9�� 48.9 99.8 S S S S S SBeverage 41.1�� 28.1 70.3 41.4 32.1 82.0 37.3 15.5 44.8Curtainside N�� N N N N N N N NDump 12.0�� 12.1 21.4 14.1 15.1 26.2 7.5 9.0 11.8Flatbed, stake, or platform 12.5�� 13.9 25.2 15.2 17.8 23.8 7.5 8.4 8.5

Livestock S�� S S S S S S S SLow boy 32.6�� 29.7 20.3 36.7 33.6 31.9 16.8 12.4 29.1Mobile home toter S�� N N S N N S N NOpen top 37.1�� 48.9 130.5 46.2 S S 27.5 S SPole, logging, pulpwood, or pipe N�� S S N S S N S S

Tank, dry bulk 38.9�� 26.0 60.6 39.6 26.7 59.4 5.1 6.3 7.8Tank, liquids or gases 22.9�� 18.5 23.9 27.5 22.3 28.0 15.2 12.5 19.2Van, basic enclosed 5.1�� 7.1 9.4 6.3 8.8 11.6 3.3 4.1 5.3Van, drop�frame 43.9�� 32.5 36.9 S 44.6 S S 30.5 SVan, insulated nonrefrigerated S�� N S S N S S N S

Van, insulated refrigerated 16.7�� 16.6 16.9 16.2 21.5 17.0 10.5 10.8 13.2Other S�� N N S N N S N NNot applicable2 20.3�� N N N N N N N N

ANNUAL MILES

Less than 5,000 9.3�� 8.2 17.1 11.3 11.0 28.8 6.2 7.5 12.85,000 to 9,999 5.9�� 9.2 39.4 6.0 9.3 44.0 1.2 2.1 2.710,000 to 19,999 4.9�� 6.5 16.7 5.0 6.8 17.5 1.2 1.3 1.820,000 to 29,999 8.4�� 9.9 19.1 8.4 10.0 19.6 1.0 1.2 1.630,000 to 49,999 10.5�� 8.4 10.9 10.6 8.4 11.4 1.6 1.4 2.2

50,000 to 74,999 10.4�� 9.7 11.6 10.0 9.4 11.2 1.4 1.1 1.875,000 or more 6.1�� 7.6 9.2 6.0 7.9 9.1 1.9 2.1 2.7Not applicable1 13.9�� 21.2 86.0 33.8 N N 29.1 N N



Table 3b. Trucks, Truck Miles, and Average Annual Miles for Trucks, Excluding Pickups,Minivans, Other Light Vans, and Sport Utilities�Measures of Sampling Variability:2002 and 1997�Con.



trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I


Off�the�road 19.0�� 13.3 14.6 25.1 16.7 33.5 20.0 13.0 41.950 miles or less 4.2�� 4.3 8.0 5.3 6.9 10.4 4.1 5.3 6.051 to 100 miles 7.0�� 7.2 18.2 8.1 9.2 10.4 6.0 6.3 4.0101 to 200 miles 14.0�� 9.2 16.2 17.8 9.6 13.1 15.3 6.4 11.2201 to 500 miles 10.5�� 9.3 18.2 10.4 8.4 6.2 8.3 7.0 3.9

501 miles or more 7.0�� 14.5 103.2 5.7 17.9 55.4 5.1 9.1 4.8Not reported 12.0�� 21.2 109.0 10.9 N N 8.2 N NNot applicable 13.9�� N N 33.8 N N 29.1 N N


Operated in Canada 44.4�� N N 46.7 N N 14.3 N NOperated in Mexico S�� N N S N N S N NOperated within the home base state 3.0�� N N 4.0 N N 3.4 N NOperated in states other than the home basestate 4.6�� N N 4.9 N N 4.1 N N

Not reported 11.9�� N N 11.6 N N 8.2 N NNot applicable1 13.9�� N N 33.8 N N 29.1 N N

MONTHS OPERATED

12 1.9�� N N 2.9 N N 2.6 N N7 to 11 8.6�� N N 8.3 N N 7.7 N N2 to 6 10.9�� N N 12.0 N N 11.8 N N1 or less 22.1�� N N 38.5 N N 35.6 N NVehicle not used 13.9�� N N 33.8 N N 29.1 N N

VEHICLE SIZE

Light 9.5�� 6.8 8.3 11.6 10.7 9.1 7.1 7.4 8.4Medium 3.0�� 7.2 35.3 4.5 9.9 36.3 3.4 6.3 5.3Light�heavy 8.9�� 8.6 20.4 10.8 12.8 20.9 6.1 9.5 8.6Heavy�heavy 3.1�� 3.6 4.8 3.6 5.1 6.0 3.4 3.9 4.9


Less than 6,001 14.6�� 14.8 34.8 16.0 22.4 40.7 7.3 16.4 15.96,001 to 8,500 19.3�� N N 26.2 N N 18.8 N N8,501 to 10,000 18.9�� N N 22.9 N N 14.0 N N10,001 to 14,000 5.5�� 10.3 46.0 7.6 12.6 45.0 5.3 6.1 6.314,001 to 16,000 18.5�� 15.6 24.9 22.0 19.0 29.0 12.9 12.7 17.5

16,001 to 19,500 6.3�� 18.0 198.1 7.6 29.3 222.9 4.4 21.2 15.419,501 to 26,000 8.9�� 8.6 20.4 10.8 12.8 20.9 6.1 9.5 8.626,001 to 33,000 19.8�� 14.8 16.4 27.7 16.7 20.9 18.7 10.6 21.033,001 to 40,000 20.2�� 9.4 8.2 31.5 10.9 2.7 25.0 5.6 5.740,001 to 50,000 11.5�� 10.2 15.4 19.6 19.5 16.9 14.8 13.5 12.3

50,001 to 60,000 9.3�� 10.8 11.9 14.7 17.0 11.6 11.2 11.8 10.160,001 to 80,000 3.1�� 5.2 9.4 4.2 8.1 15.7 2.9 4.9 6.480,001 to 100,000 S�� 48.9 S S S S S S S100,001 to 130,000 S�� N S S N S S N S130,001 or more S�� N S S N S S N S

TOTAL LENGTH (FEET)

Less than 20.0 6.5�� 5.4 9.8 8.4 8.2 11.4 5.7 5.8 6.820.0 to 27.9 4.7�� 6.1 16.1 6.1 8.7 17.9 4.1 6.3 6.028.0 to 35.9 5.5�� 11.0 51.4 7.0 14.4 40.8 4.5 9.4 6.436.0 to 40.9 13.0�� 13.3 29.3 16.1 16.6 35.7 11.4 9.4 14.541.0 to 44.9 24.6�� 21.5 36.9 21.8 25.8 65.0 14.9 16.7 38.1

45.0 to 49.9 29.0�� 22.4 21.7 39.3 43.7 54.8 19.2 31.5 58.150.0 to 54.9 21.0�� 15.3 21.4 21.1 18.1 15.5 18.3 12.2 15.055.0 to 59.9 12.5�� 9.0 8.0 15.5 10.6 7.5 9.2 5.8 8.460.0 to 64.9 9.1�� 11.8 16.0 11.9 17.0 19.3 6.8 9.6 10.165.0 to 69.9 13.4�� 10.9 14.7 16.1 12.6 15.0 9.0 6.2 9.5

70.0 to 74.9 6.1�� 23.3 118.5 7.2 32.0 174.8 3.2 11.9 13.375.0 to 79.9 29.5�� N N 31.9 N N 12.1 N N80.0 or more 49.1�� N N S N N S N N

MILES PER GALLON

Less than 5 10.0�� 7.8 12.4 10.6 8.9 10.1 7.8 7.4 8.05 to 6.9 6.7�� 4.8 4.8 7.5 6.6 5.1 6.3 4.9 7.07 to 8.9 5.7�� 8.3 24.2 5.6 10.4 29.9 4.8 7.7 9.79 to 10.9 4.6�� 9.0 40.9 5.6 12.3 39.1 3.5 8.4 6.511 to 12.9 15.0�� 12.3 21.0 21.4 16.2 32.7 16.0 10.6 21.513 to 14.9 13.2�� 20.1 92.5 16.8 24.0 79.3 10.8 14.3 12.615 or more 21.1�� 15.7 12.2 23.0 19.0 12.4 16.7 7.8 16.5

15 to 20.9 21.1�� 15.7 12.2 23.0 19.0 12.4 16.7 7.8 16.521 to 24.9 N�� N N N N N N N N25 or more N�� N N N N N N N N

Not reported 9.8�� 10.2 18.0 9.5 16.6 35.8 6.6 12.6 21.0Not applicable1 13.9�� N N 33.8 N N 29.1 N N






trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

MODEL YEAR

2003 20.1�� N N 21.4 N N 7.3 N N2002 10.4�� N N 8.8 N N 6.9 N N2001 15.0�� N N 13.4 N N 10.9 N N2000 10.0�� N N 11.2 N N 7.8 N N1999 16.2�� N N 14.3 N N 11.1 N N

1998 15.2�� S S 16.2 S S 13.4 S S1997 16.1�� 11.1 16.1 15.3 13.5 7.9 8.7 9.4 6.11996 16.2�� 12.6 12.7 15.7 12.2 7.2 11.3 8.7 8.31995 13.1�� 10.8 19.1 13.0 11.1 10.3 7.4 7.6 5.71994 13.4�� 15.5 31.1 15.0 19.4 14.4 9.0 14.9 6.71993 14.0�� 19.4 38.5 14.1 20.5 21.8 9.1 13.7 8.9Pre�1993 3.0�� 2.8 6.0 4.6 5.0 5.2 3.7 4.2 2.9

VEHICLE ACQUISITION

New 2.0�� 4.8 15.0 3.1 5.6 13.0 2.7 4.3 3.6Used 5.2�� 3.8 6.1 6.5 6.7 8.2 5.8 5.7 7.6Not reported 17.1�� 9.2 8.5 17.6 10.8 3.1 12.3 7.5 5.0



Vehicle only 9.7�� N N 8.8 N N 7.2 N NVehicle with driver S�� N N S N N S N NNot reported N�� N N N N N N N N

Lessor 12.1�� N N 11.3 N N 8.4 N NVehicle only 12.3�� N N 11.5 N N 8.3 N NVehicle with driver 49.2�� N N S N N S N NNot reported N�� N N N N N N N N

Not reported 44.0�� N N 40.2 N N 25.9 N NNot leased 2.0�� N N 3.3 N N 2.9 N NNot reported 7.8�� N N 9.8 N N 7.8 N N


1 to 11 months 35.3�� N N 29.7 N N 27.2 N N12 months or more 7.6�� N N 6.8 N N 5.5 N NNot reported S�� N N S N N S N N

Provisions of lease:Financing only 8.6�� N N 7.5 N N 6.1 N NFull maintenance 14.9�� N N 13.7 N N 9.0 N NPayment of taxes 12.7�� N N 11.9 N N 8.3 N NObtaining licenses and permits 13.3�� N N 12.5 N N 9.3 N NRecordkeeping 12.3�� N N 10.1 N N 8.4 N NFuel contract 25.7�� N N 22.0 N N 14.6 N N


Private 4.5�� N N 5.3 N N 4.2 N NMotor carrier 6.4�� N N 5.9 N N 4.7 N NOwner operator 14.9�� N N 16.2 N N 11.9 N NRental 3.1�� N N 4.0 N N 2.6 N NPersonal transportation N�� N N N N N N N NNot applicable1 13.9�� N N 33.8 N N 29.1 N N


Contract 7.3�� N N 6.7 N N 4.5 N NCommon 11.3�� N N 12.7 N N 10.0 N NNot reported 22.4�� N N 21.5 N N 14.8 N NNot applicable3 1.3�� N N 2.7 N N 2.4 N N

Type of service:Truckload 6.0�� 7.6 15.1 5.6 8.5 13.4 4.3 3.6 4.7Less�than truckload 17.0�� 16.8 21.2 21.8 13.5 26.6 14.8 11.4 21.9Not reported 23.0�� N N 21.3 N N 14.1 N NNot applicable3 1.3�� N N 2.7 N N 2.4 N N

Source of hauls:Shippers or receivers 6.7�� N N 6.3 N N 4.7 N NBrokers 19.3�� N N 21.6 N N 9.6 N NCentralized markets or exchanges 28.3�� N N 32.8 N N 16.7 N NOther N�� N N N N N N N NNot reported 16.1�� N N 18.6 N N 12.9 N NNot applicable3 1.3�� N N 2.7 N N 2.4 N N


Carrying hazardous materials 16.2�� 8.7 8.5 20.3 9.7 6.0 16.9 6.5 10.5Not carrying hazardous materials 3.9�� 2.8 4.2 3.9 4.8 6.9 3.6 3.8 6.7Not reported 12.2�� 8.1 7.1 12.1 12.1 8.9 10.5 9.7 15.4Not applicable5 2.8�� N N 3.9 N N 2.7 N N






trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

EQUIPMENT TYPE

Aerial work platform/bucket 35.7�� N N S N N S N NAir bag(s) (safety device only) 8.2�� 10.3 18.1 6.5 8.6 11.0 6.8 6.9 7.2Air compressor (except air brakes) 14.2�� N N 13.8 N N 12.5 N NAir�conditioning 1.6�� 3.5 10.4 2.5 4.8 7.4 2.3 3.6 2.2Air springs 6.1�� N N 5.0 N N 5.5 N N

Antilock brake system 4.0�� 8.7 40.5 4.1 8.6 21.6 3.8 6.7 4.1Collision warning system 48.7�� N N 42.1 N N 26.1 N NComputerized drive train control unit 17.3�� N N 15.5 N N 13.1 N NCrane 31.9�� N N 34.9 N N 23.6 N NElectronic vehicle identification device 22.8�� 11.3 8.6 21.0 11.7 4.7 12.1 3.9 7.3

Engine retarder/brake 3.8�� 5.4 7.2 4.5 7.2 8.4 3.4 4.3 5.0Front�wheel drive N�� N N N N N N N NHoist 18.0�� N N 20.5 N N 15.6 N NIdle�reducing technology (portable auxiliary pack,electrification, etc.) 8.4�� N N 7.6 N N 6.3 N N

Internet access 43.8�� N N 44.1 N N 5.3 N N

Lift gate 15.4�� N N 16.7 N N 9.0 N NMounting bar for snowplow S�� N N S N N S N NNavigational system 40.0�� S S 42.1 S S 13.1 S SPower take�off 7.4�� N N 8.3 N N 7.1 N NRadial tires 1.8�� 3.1 7.2 2.7 4.5 6.3 2.5 3.5 2.6

Reflective material in addition to those requiredby law 7.2�� 6.6 7.3 7.1 8.2 8.7 6.1 6.0 9.2

Road speed governor 3.8�� 5.8 18.4 3.8 6.9 11.0 3.6 5.3 3.3Toolbox 7.4�� N N 8.6 N N 6.8 N NTrip recorder or on�board computer withcommunication capabilities 7.0�� N N 7.5 N N 4.2 N N


Vehicle control aids for handicapped drivers N�� N N N N N N N NWheelchair lift N�� N N N N N N N NWinch 25.3�� N N 30.2 N N 18.9 N N

Transmission type:Automatic 3.1�� N N 4.1 N N 2.7 N NManual 3.5�� N N 3.7 N N 3.7 N NSemiautomated manual S�� N N S N N S N NAutomated manual S�� N N S N N S N NNot reported 14.6�� N N 13.7 N N 9.3 N N

Braking system:Hydraulic (standard) 8.7�� 7.9 12.4 12.0 11.1 16.3 8.9 6.9 10.7Hydraulic with power assist 2.4�� 5.8 22.5 3.8 8.8 24.8 2.9 6.3 5.1Air 3.7�� 3.4 5.0 3.9 5.1 5.9 3.7 3.7 4.8Other N�� 26.5 N N 38.8 N N 27.8 NNot reported 13.9�� N N 13.4 N N 9.7 N N


Fuel type:Gasoline 4.9�� 4.6 10.5 6.6 8.4 16.6 4.5 6.6 7.9Diesel 2.6�� 3.3 7.5 2.9 4.5 6.1 2.8 3.5 2.9Natural gas N�� N N N N N N N NPropane 41.4�� N N 44.3 N N 12.8 N NAlcohol fuels N�� N N N N N N N N

Electricity N�� N N N N N N N NCombination 42.5�� N N 39.3 N N 6.8 N NOther N�� N N N N N N N NNot reported N�� N N N N N N N NNot applicable1 13.9�� N N 33.8 N N 29.1 N N

Cylinders6:4 cylinders 10.4�� 10.2 14.3 11.7 12.6 16.9 7.3 7.7 10.66 cylinders 3.9�� 4.3 7.5 3.6 5.2 6.5 3.6 4.0 4.38 cylinders 2.6�� 5.0 15.8 4.0 7.7 18.7 3.0 5.4 4.8Other 11.4�� 7.0 8.6 17.2 10.5 9.0 12.8 9.2 11.0

Cubic inch displacement6:Gasoline fuel 4.9�� 4.6 10.5 6.6 8.4 16.6 4.5 6.6 7.9

Less than 200 14.7�� 44.3 625.9 16.2 S S 6.9 S S200 to 299 S�� 26.5 S S 31.6 S S 18.6 S300 to 349 40.5�� 37.7 85.8 S 40.8 S S 18.5 S350 to 399 8.9�� 8.7 19.5 12.4 14.3 23.0 9.0 11.4 11.2400 or more 9.8�� 12.6 34.0 10.9 16.4 43.3 4.9 8.4 10.1Not available 25.1�� 11.2 8.4 38.6 21.9 6.3 28.0 18.3 15.4

Diesel fuel 2.6�� 3.3 7.5 2.9 4.5 6.1 2.8 3.5 2.9Less than 400 11.5�� 10.4 11.8 12.5 13.0 12.5 7.4 7.4 9.6400 to 599 4.1�� 9.2 48.8 5.6 11.4 33.4 3.9 7.6 4.7600 to 799 4.2�� 5.9 8.8 5.5 7.6 12.0 3.4 4.5 5.9800 or more 6.2�� 7.2 7.7 8.1 10.7 9.6 5.3 6.1 7.0Not available 12.4�� 8.1 5.9 16.8 14.3 9.0 11.6 11.5 16.9

Other fuel 29.7�� 34.1 87.4 33.1 39.0 71.7 13.1 18.4 16.4Less than 400 42.5�� S S 47.0 S S 11.2 S S400 or more 47.6�� S S S S S S S SNot available S�� S S S S S S S S

Not reported N�� N N N N N N N NNot applicable1 13.9�� N N 33.8 N N 29.1 N N






trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

REFUELING LOCATION

Gas station 2.2�� N N 3.6 N N 2.9 N NTruck stop 8.9�� N N 8.9 N N 7.3 N NOwn facility (including home, farm, ranch, onsiteby mobile supplier, etc.) 5.3�� N N 5.1 N N 4.5 N N


Other N�� N N N N N N N NNot reported 24.3�� N N 23.5 N N 14.9 N NNot applicable1 13.9�� N N 33.8 N N 29.1 N N

MAINTENANCE

General maintenance performed by:None performed 40.7�� 47.1 129.2 S S S S S SCompany�owned maintenance facility 2.0�� 4.3 14.4 2.9 6.0 11.5 2.6 4.7 3.1General repair business or private mechanic 5.6�� 6.4 11.2 5.1 8.2 13.1 4.7 6.4 8.2Dealership service department 7.9�� 10.4 21.1 6.6 15.4 41.3 6.6 10.8 19.3Leasing company 31.3�� 12.1 14.2 28.2 14.1 5.8 16.7 6.1 7.8

Individual not employed/paid by anymaintenance type facility 12.2�� 6.0 5.9 15.0 9.2 9.3 13.1 7.8 18.4

Other N�� 47.0 N N 48.3 N N 22.6 NNot reported 27.5�� 11.0 4.7 25.6 12.7 3.1 19.9 9.9 15.3Not applicable1 13.9�� N N 33.8 N N 29.1 N N

Extensive repairs performed by:None performed 2.0�� 23.7 1 724.5 3.0 29.9 3 195.3 2.7 24.3 35.9Company�owned maintenance facility 9.0�� 6.2 8.2 10.5 8.3 5.5 7.8 6.1 5.5General repair business or private mechanic 13.0�� 6.6 4.8 13.8 7.9 8.0 10.4 6.0 18.3Dealership service department 15.9�� 6.7 4.4 16.1 8.5 3.5 13.0 6.0 11.0Leasing company 48.7�� 12.9 10.9 45.9 14.8 4.7 9.0 5.8 4.8

Component distributorship (engine,transmission, body, etc.) 39.3�� 8.6 5.0 35.4 10.1 1.7 18.5 5.6 7.2

Individual not employed/paid by any repair typefacility 26.4�� 12.2 4.7 27.2 16.5 12.5 22.5 13.7 63.2

Other N�� 47.0 N N S S N S SNot reported S�� 6.3 S S 10.3 S S 8.0 SNot applicable1 13.9�� N N 33.8 N N 29.1 N N


Single�unit trucks and truck�tractors withouttrailer 1.3�� 2.6 6.1 2.8 4.8 9.0 2.5 3.9 3.62 axles 1.4�� 3.0 7.3 3.0 5.6 11.1 2.7 4.6 4.23 axles 7.0�� 8.3 12.4 12.2 10.8 13.8 9.9 9.3 10.04 axles 30.9�� 10.8 5.6 42.5 11.9 5.9 29.2 5.0 23.45 axles or more 12.7�� N N 13.9 N N 5.7 N NNot reported 49.1�� N N S N S S N S

Combinations 3.8�� 4.5 5.2 4.1 5.6 6.5 3.5 4.0 5.6Single�unit trucks with trailer 23.1�� 13.5 10.8 30.1 17.3 13.2 21.7 11.0 23.0

3 axles 48.7�� 27.0 26.6 S 32.6 S S 19.3 S4 axles 32.5�� 21.5 17.0 46.3 25.5 24.1 30.3 12.2 34.15 axles or more 32.6�� 16.8 7.8 41.6 28.8 13.0 25.8 16.8 37.3Not reported S�� N N S N N S N N

Truck�tractors with single trailer 3.1�� 5.1 7.9 3.9 8.0 12.6 3.1 4.7 6.03 axles 28.2�� 19.1 28.0 48.2 35.9 45.3 30.3 21.7 34.24 axles 19.7�� 15.4 19.7 23.9 23.4 22.0 15.9 16.2 18.85 axles or more 3.3�� 6.2 9.5 4.3 8.9 14.5 2.8 4.7 5.9Not reported 16.5�� N N 20.0 N N 11.3 N N

Truck�tractors with double trailers 22.8�� 11.1 10.8 29.3 12.9 11.2 12.2 4.1 10.65 axles 27.4�� 20.6 56.6 32.4 23.2 92.9 11.2 10.7 21.96 axles 40.1�� 15.1 7.8 S 16.4 S S 6.3 S7 axles S�� 22.0 S S 23.7 S S 3.8 S8 axles or more S�� S S S S S S S SNot reported N�� N N N N N N N N

Truck�tractors with triple trailers N�� 19.3 N N 18.6 N N 9.1 N7 axles N�� S S N S S N S S8 axles N�� 26.0 N N 26.7 N N 6.0 N9 axles N�� 25.2 N N 24.1 N N 12.3 N10 axles or more N�� N N N N N N N NNot reported N�� N N N N N N N N

Driving axles:1 1.2�� 2.7 6.0 3.4 4.9 9.0 3.1 3.9 3.82 2.8�� 3.9 5.1 3.6 6.1 6.9 3.3 4.0 4.83 or more S�� 30.8 S S 34.8 S S 16.1 SNot reported 37.0�� N N S N S S N S

Total liftable axles and locations:None 1.0�� 5.5 33.1 2.4 8.4 32.6 2.3 6.4 4.31 25.2�� 25.2 20.8 38.4 31.9 36.0 28.9 25.4 47.6

Forward of the drive axle 40.1�� N N S N N S N NBelow the chassis 49.1�� N N S N N S N NBeyond the chassis S�� N N S N N S N NNot reported S�� N N S N N S N N

2 or more 12.7�� 15.0 21.0 13.9 16.8 18.7 5.7 11.3 10.2Forward of the drive axle 13.1�� N N 14.4 N N 6.0 N NBelow the chassis S�� N N S N N S N NBeyond the chassis 13.7�� N N 15.0 N N 6.1 N NNot reported S�� N N S N N S N N

Not reported 43.8�� N N S N N S N N






trucks1997

trucksPercentchange

2002 truckmiles

1997 truckmiles

Percentchange


truck


truckPercentchange

A B C D E F G H I

TRUCK TYPE AND AXLEARRANGEMENT�Con.

Total liftable axles and number of braking axles:None 1.0�� 5.5 33.1 2.4 8.4 32.6 2.3 6.4 4.31 25.2�� 25.2 20.8 38.4 31.9 36.0 28.9 25.4 47.6

0 braking S�� N N S N N S N N1 braking 27.1�� N N 41.4 N N 31.3 N NNot reported S�� N N S N N S N N

2 or more 12.7�� 15.0 21.0 13.9 16.8 18.7 5.7 11.3 10.20 braking N�� N N N N N N N N1 braking N�� N N N N N N N N2 or more braking 12.8�� N N 14.1 N N 5.9 N NNot reported S�� N N S N N S N N

Not reported 43.8�� N N S N N S N N

CAB TYPE

Conventional cab 1.2�� 2.7 6.3 2.8 4.5 6.2 2.6 3.7 2.4With sleeper 7.2�� N N 8.6 N N 4.6 N NWithout sleeper 1.2�� N N 3.2 N N 2.9 N NNot reported 24.4�� N N 28.2 N N 14.1 N N

Cab over engine 4.7�� 8.2 11.4 6.4 11.7 29.6 4.9 8.1 17.4With sleeper 7.5�� N N 8.5 N N 4.3 N NWithout sleeper 6.4�� N N 8.7 N N 6.3 N NNot reported 43.8�� N N 44.5 N N 7.4 N N

Cab forward of engine S�� 17.3 S S 22.2 S S 15.2 SCab beside engine N�� 44.7 N N 49.1 N N 23.5 NNot reported 43.8�� N N S N N S N N


1Vehicles not in use. When the respondent had partial�year ownership of the vehicle, annual miles were adjusted to reflect miles traveled when not owned by the respondent.2Truck�tractors not in use.3Vehicles that are private, rental, or used for personal transportation; and vehicles not in use.4Distributed miles data are available in Table 8.5Vehicles that are rental or used for personal tranportation; and vehicles not in use.6Data were derived from administrative records.


Table 4. Trucks by Vehicle Size: 2002[Thousands. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]

Vehicular and operational characteristicsVehicle size

Total Light Medium Light�heavy Heavy�heavy

Coefficient ofvariation of total

(percent)

Total 1 500.1�� 1 383.9 68.8 15.8 31.5 XCoefficient of variation (percent) 1.0�� 1.2 5.7 8.9 11.2 X

BUSINESS1

For�hire transportation or warehousing 24.4�� S S .8 8.6 27.9Vehicle leasing or rental 85.5�� 28.7 48.7 6.5 1.6 10.3Agriculture, forestry, fishing, or hunting 2.3�� S .7 S 1.0 19.7Mining .8�� V S V .6 26.4Utilities 23.5�� 20.8 1.3 .8 .7 35.0

Construction 83.3�� 69.4 5.3 2.2 6.3 17.6Manufacturing 22.6�� 20.5 S .9 .8 36.5Wholesale trade 10.6�� S .7 1.0 1.7 43.4Retail trade 31.6�� 24.0 2.1 S S 29.8Information services S�� S S V S S

Waste management, landscaping, or administrative/support services 9.4�� S .6 S 1.5 48.9Arts, entertainment, or recreation services .8�� S S V .2 38.0Accommodation or food services S�� S S S .2 SOther services 54.1�� 53.0 1.0 V .2 23.8Personal transportation 1 066.6�� 1 066.5 S V V 2.9Not reported 18.2�� 13.9 1.3 1.6 1.5 36.0Not applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6

BODY TYPESingle�unit trucks 1 482.5�� 1 383.9 68.8 15.4 14.3 1.1

Pickup 740.6�� 733.6 S V S 1.8Minivan 171.3�� 171.3 V V V 11.9Other light vans 90.5�� 90.5 V V V 17.6Sport utility 374.9�� 374.9 V V V 6.2Armored V�� V V V V N

Beverage .7�� V V S S 47.6Concrete mixer 1.6�� V V V 1.6 13.0Concrete pumper .2�� V V V .2 40.0Crane S�� V V S S SCurtainside S�� V V V S S

Dump 4.9�� S .9 1.3 2.6 13.4Flatbed, stake, or platform 12.1�� 3.3 3.7 3.3 1.8 9.7Low boy V�� V V V V NPole, logging, pulpwood, or pipe V�� V V V V NService, utility 4.0�� .7 2.7 S S 19.0

Service, other 2.9�� .9 1.7 S S 21.3Street sweeper S�� V S V V STank, dry bulk .1�� V V V .1 49.1Tank, liquids or gases 2.9�� S S .8 2.0 18.7Tow/Wrecker 1.2�� S .6 S S 34.8

Trash, garbage, or recycling 1.3�� V S V 1.3 18.5Vacuum S�� V S V S SVan, basic enclosed 67.2�� 7.2 52.5 7.2 S 2.9Van, insulated nonrefrigerated S�� V S V V SVan, insulated refrigerated 1.4�� S .7 S S 30.5

Van, open top S�� S S S V SVan, step, walk�in, or multistop 3.1�� .9 1.7 S S 20.6Van, other .6�� S S S S 48.7Other V�� V V V V N

Truck�tractors 17.5�� V V .4 17.1 3.0Automobile carrier .2�� V V V .2 43.9Beverage .4�� V V V .4 41.1Curtainside V�� V V V V NDump 2.0�� V V V 2.0 12.0Flatbed, stake, or platform 2.3�� V V S 2.3 12.5

Livestock S�� V V V S SLow boy .3�� V V V .3 32.6Mobile home toter S�� V V S S SOpen top .2�� V V S .2 37.1Pole, logging, pulpwood, or pipe V�� V V V V N

Tank, dry bulk .5�� V V V .5 38.9Tank, liquids or gases .6�� V V V .6 22.9Van, basic enclosed 8.5�� V V V 8.5 5.1Van, drop�frame .2�� V V V .2 43.9Van, insulated nonrefrigerated S�� V V V S S

Van, insulated refrigerated 1.5�� V V S 1.5 16.7Other S�� V V V S SNot applicable3 .7�� V V .3 .4 20.3

ANNUAL MILESLess than 5,000 188.4�� 176.7 6.7 2.2 2.7 12.05,000 to 9,999 313.0�� 281.4 24.2 1.7 S 8.810,000 to 19,999 697.9�� 664.9 25.1 4.4 3.5 4.920,000 to 29,999 159.7�� 144.9 5.8 5.6 3.4 13.030,000 to 49,999 56.1�� 50.2 1.5 .7 3.6 22.6

50,000 to 74,999 17.3�� 13.5 S .2 3.2 38.875,000 or more 15.4�� S S S 8.0 31.4Not applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6

PRIMARY RANGE OF OPERATIONOff�the�road 28.9�� 26.4 S S 1.5 32.150 miles or less 902.7�� 861.7 23.3 6.7 11.0 3.851 to 100 miles 177.0�� 157.0 16.4 .7 2.9 12.1101 to 200 miles 59.2�� 53.5 3.5 S 1.8 22.1201 to 500 miles 24.8�� S 10.9 .8 S 27.5

501 miles or more 48.2�� 28.0 11.6 3.5 5.1 19.7Not reported 207.0�� 200.7 1.4 2.2 2.6 11.6Not applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6



Table 4. Trucks by Vehicle Size: 2002�Con.[Thousands. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]




(percent)

PRIMARY JURISDICTIONOperated in Canada .8�� S S S V 44.4Operated in Mexico S�� S V V S SOperated within the home base state 1 193.5�� 1 127.0 36.4 8.0 22.2 2.4Operated in states other than the home base state 71.9�� 33.5 28.1 4.4 5.9 14.0Not reported 174.7�� 167.7 2.7 2.4 1.9 12.7Not applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6

MONTHS OPERATED12 1 009.6�� 917.3 60.4 11.4 20.5 3.37 to 11 247.3�� 236.6 2.9 2.1 5.6 10.32 to 6 158.3�� 150.9 3.0 1.0 3.4 13.41 or less 32.6�� 30.4 1.2 S .6 30.5Vehicle not used 52.3�� 48.7 1.3 1.0 1.4 23.6

AVERAGE WEIGHT (POUNDS)Less than 6,001 1 085.5�� 1 085.5 N N N 2.86,001 to 8,500 277.8�� 277.8 N N N 9.88,501 to 10,000 20.6�� 20.6 N N N 36.710,001 to 14,000 34.0�� N 34.0 N N 5.514,001 to 16,000 S�� N S N N S

16,001 to 19,500 28.2�� N 28.2 N N 6.319,501 to 26,000 15.8�� N N 15.8 N 8.926,001 to 33,000 S�� N N N S S33,001 to 40,000 1.9�� N N N 1.9 20.240,001 to 50,000 3.4�� N N N 3.4 11.5

50,001 to 60,000 3.2�� N N N 3.2 9.360,001 to 80,000 16.3�� N N N 16.3 3.180,001 to 100,000 S�� N N N S S100,001 to 130,000 S�� N N N S S130,001 or more S�� N N N S S

TOTAL LENGTH (FEET)Less than 20.0 1 267.9�� 1 252.8 9.1 5.1 .9 1.920.0 to 27.9 155.6�� 116.7 30.5 4.9 3.5 12.128.0 to 35.9 44.1�� S 24.5 5.0 7.0 14.036.0 to 40.9 4.1�� S 1.0 S 2.8 13.041.0 to 44.9 S�� S S S 1.2 S

45.0 to 49.9 S�� V S S .7 S50.0 to 54.9 2.0�� V S V 1.7 20.955.0 to 59.9 1.8�� V V V 1.8 12.560.0 to 64.9 3.8�� V V V 3.8 9.165.0 to 69.9 1.6�� V V S 1.6 13.4

70.0 to 74.9 6.2�� V V V 6.2 6.175.0 to 79.9 .3�� V V V .3 29.580.0 or more .1�� V V S S 49.1

MILES PER GALLONLess than 5 5.9�� S S .7 4.9 10.05 to 6.9 12.3�� S 1.0 1.2 9.6 6.77 to 8.9 30.0�� .6 16.8 5.7 6.8 5.79 to 10.9 123.9�� 82.8 37.6 2.4 1.1 13.011 to 12.9 120.2�� 115.6 3.2 .8 .6 15.613 to 14.9 138.0�� 132.5 S .9 S 14.415 or more 794.1�� 792.4 1.3 S S 4.3

15 to 20.9 595.4�� 593.7 1.3 S S 5.721 to 24.9 142.0�� 142.0 V V V 14.525 or more 56.7�� 56.7 V V V 23.8

Not reported 223.4�� 210.8 3.2 2.9 S 11.0Not applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6

MODEL YEAR2003 .7�� V V V .7 20.12002 122.8�� 118.1 .5 S 3.8 15.22001 126.5�� 123.0 .6 .8 2.1 15.32000 179.6�� 168.3 4.5 4.6 2.2 12.21999 103.7�� 96.9 S .8 1.3 17.0

1998 97.6�� 93.2 2.2 S 1.9 17.41997 80.5�� 76.7 1.8 .7 1.4 19.31996 90.9�� 87.6 1.2 S 1.8 18.21995 65.8�� 60.1 3.4 S 1.7 21.01994 63.0�� 56.8 4.4 S 1.5 21.31993 63.1�� 57.2 4.6 S 1.0 21.5Pre�1993 505.8�� 445.9 41.0 6.8 12.2 6.2

VEHICLE ACQUISITIONNew 690.2�� 602.9 60.2 8.9 18.1 5.0Used 725.3�� 700.6 6.2 6.1 12.4 4.8Not reported 84.5�� 80.4 2.4 .8 .9 18.9

LEASE CHARACTERISTICSLeased 134.8�� 119.5 4.4 3.7 7.2 14.1

Lessee 119.0�� 109.6 3.6 1.8 4.0 15.4Vehicle only 9.8�� .5 3.6 1.8 3.9 9.7Vehicle with driver S�� V V V S SNot reported V�� V V V V NNot applicable4 109.1�� 109.1 V V V 16.8

Lessor 12.1�� S .6 1.8 3.1 39.1Vehicle only 5.4�� S .6 1.8 2.9 12.3Vehicle with driver .1�� V V V .1 49.2Not reported V�� V V V V NNot applicable4 S�� S V V V S

Not reported S�� S S S .1 SNot leased 869.6�� 785.3 55.9 9.3 19.1 4.0Not reported 495.7�� 479.1 8.5 2.8 5.3 6.6







(percent)

LEASE CHARACTERISTICS�Con.Length of leasing agreement:

Leased 134.8�� 119.5 4.4 3.7 7.2 14.11 to 11 months .8�� V S V .5 35.312 months or more 14.6�� .6 3.9 3.6 6.7 7.6Not reported S�� V S S S SNot applicable4 119.0�� 119.0 V V V 16.0

Provisions of lease5:Financing only 12.1�� .6 3.6 2.9 5.1 8.6Full maintenance 4.0�� V .4 1.6 2.0 14.9Payment of taxes 5.4�� .2 1.0 1.7 2.6 12.7Obtaining licenses and permits 4.9�� .1 .8 1.7 2.2 13.3Recordkeeping 4.4�� S .5 1.1 2.7 12.3Fuel contract 1.6�� V S .7 .5 25.7

PRIMARY OPERATOR CLASSIFICATIONPrivate 263.4�� 223.0 16.7 7.2 16.6 9.6Motor carrier 25.2�� 13.6 1.3 .8 9.5 26.5Owner operator S�� S .8 S 2.0 SRental 85.9�� 28.7 48.7 6.5 2.0 10.3Personal transportation 1 066.6�� 1 066.5 S V V 2.9Not applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6


Contract 8.4�� S .9 S 7.0 7.3Common 5.5�� S .8 .6 3.8 11.3Not reported 1.2�� S S S .7 22.4Not applicable6 1 485.0�� 1 383.6 66.7 14.7 20.0 1.1

Type of service:Truckload 10.3�� V .9 S 9.1 6.0Less�than truckload 3.1�� S .6 S 1.7 17.0Not reported 1.7�� V .6 S .8 23.0Not applicable6 1 485.0�� 1 383.6 66.7 14.7 20.0 1.1

Source of hauls:Shippers or receivers 10.7�� S .7 .8 8.8 6.7Brokers .8�� V V S .8 19.3Centralized markets or exchanges .4�� V S V .3 28.3Other V�� V V V V NNot reported 3.2�� V 1.3 S 1.6 16.1Not applicable6 1 485.0�� 1 383.6 66.7 14.7 20.0 1.1


Carrying hazardous materials 3.2�� S S .6 2.3 16.2Not carrying hazardous materials 45.1�� 5.5 13.4 6.6 19.6 3.9Not reported 6.3�� .6 1.9 1.1 2.8 12.2Not applicable8 1 445.5�� 1 377.7 53.5 7.5 S 1.1

EQUIPMENT TYPE5 9

Aerial work platform/bucket 1.2�� V .8 S S 35.7Air bag(s) (safety device only) 797.1�� 783.6 S 1.1 6.2 4.2Air compressor (except air brakes) 4.5�� S 1.6 .7 2.3 14.2Air�conditioning 1 299.4�� 1 198.8 64.0 9.9 26.7 2.0Air springs 22.0�� S 11.1 S 10.6 6.1

Antilock brake system 849.9�� 799.3 35.2 3.2 12.1 4.0Collision warning system .6�� V S S S 48.7Computerized drive train control unit 193.7�� 191.5 S S 1.5 12.1Crane 1.0�� V S S .4 31.9Electronic vehicle identification device 1.4�� V S S .8 22.8

Engine retarder/brake 15.0�� .2 .7 .5 13.5 3.8Front�wheel drive 476.2�� 472.8 S V V 6.8Hoist 2.2�� S S S 1.4 18.0Idle�reducing technology (portable auxiliary pack, electrification, etc.) 5.4�� V S S 4.8 8.4Internet access .2�� V V V .2 43.8

Lift gate 4.8�� .7 1.6 2.0 .5 15.4Mounting bar for snowplow S�� S V V S SNavigational system .2�� V V V .2 40.0Power take�off 11.5�� S .7 2.2 8.5 7.4Radial tires 996.5�� 903.9 61.7 9.9 20.9 3.4

Reflective material in addition to those required by law 10.8�� S 1.3 1.1 8.0 7.2Road speed governor 51.9�� .5 34.1 3.7 13.6 3.8Toolbox 187.8�� 168.1 11.0 2.9 5.8 11.7Trip recorder or on�board computer with communication capabilities 42.6�� 36.2 S S 6.2 25.2Trip recorder or on�board computer without communication capabilities 241.7�� 236.9 S V S 10.5

Vehicle control aids for handicapped drivers V�� V V V V NWheelchair lift S�� S V V V SWinch 11.7�� S S S .6 49.7

Transmission type:Automatic 1 096.9�� 1 040.1 43.4 7.0 S 2.8Manual 354.9�� 300.1 24.5 6.9 23.4 7.6Semiautomated manual S�� S V V S SAutomated manual S�� S V V S SNot reported 41.5�� 37.2 .9 1.9 1.4 26.5

Braking system:Hydraulic (standard) 14.8�� 3.8 6.2 3.6 1.2 8.7Hydraulic with power assist 74.7�� 8.9 57.1 7.7 1.0 2.4Air 28.1�� S .8 2.8 24.5 3.7Other V�� V V V V NNot reported 5.1�� .8 1.1 1.8 1.4 13.9Not applicable10 1 377.3�� 1 370.3 S V S 1.1







(percent)

FUEL TYPE AND ENGINE SIZEFuel type:

Gasoline 1 315.1�� 1 282.4 21.2 7.7 S 1.7Diesel 111.1�� 32.8 45.2 7.0 26.1 9.7Natural gas V�� V V V V NPropane S�� S .7 S S SAlcohol fuels V�� V V V V N

Electricity V�� V V V V NCombination 17.2�� 16.5 .5 V S 42.8Other V�� V V V V NNot reported V�� V V V V NNot applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6

Cylinders11:4 cylinders 194.2�� 192.1 1.9 S .2 12.16 cylinders 632.9�� 596.2 S 6.7 24.4 5.18 cylinders 638.1�� 567.2 58.9 7.1 S 5.2Other 34.8�� 28.5 2.4 2.0 2.0 27.3

Cubic inch displacement11:Gasoline fuel 1 315.1�� 1 282.4 21.2 7.7 S 1.7

Less than 200 349.1�� 348.1 V .9 V 8.5200 to 299 437.6�� 437.6 V V V 7.0300 to 349 221.8�� 221.5 S V S 11.2350 to 399 216.3�� 202.9 11.5 1.8 S 11.1400 or more 54.7�� 38.4 9.0 3.9 S 21.2Not available 35.7�� 34.1 .5 1.1 S 29.4

Diesel fuel 111.1�� 32.8 45.2 7.0 26.1 9.7Less than 400 27.0�� 17.8 7.2 1.5 .5 30.5400 to 599 62.7�� 15.0 38.1 5.1 4.5 11.3600 to 799 12.9�� V V S 12.8 4.2800 or more 6.2�� V V S 6.2 6.2Not available 2.4�� S V S 2.1 12.4

Other fuel 21.4�� 19.9 1.1 S S 37.8Less than 400 20.6�� 19.9 .6 V S 39.3400 or more .7�� V S S S 47.6Not available S�� V S V V S

Not reported V�� V V V V NNot applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6

REFUELING LOCATIONGas station 1 318.0�� 1 239.8 61.7 9.6 S 1.9Truck stop 13.9�� S .6 .7 5.6 34.8Own facility (including home, farm, ranch, onsite by mobile supplier, etc.) 39.5�� 17.8 4.1 2.9 14.8 19.2Other company’s/contractor’s facility not open to the public 18.1�� 14.0 .8 1.2 2.2 37.6Other V�� V V V V NNot reported 58.1�� 56.6 S S .7 23.1Not applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6

MAINTENANCE5

General maintenance performed by:None performed 21.1�� 20.3 S V S 39.0Company�owned maintenance facility 191.2�� 108.5 53.3 10.5 18.9 9.3General repair business or private mechanic 602.1�� 576.8 8.6 2.6 14.1 5.7Dealership service department 386.7�� 372.7 S .7 6.6 7.7Leasing company S�� S S .8 .4 S

Individual not employed/paid by any maintenance type facility 456.2�� 450.4 2.7 .8 2.4 7.0Other V�� V V V V NNot reported 64.2�� 63.2 .6 V .4 22.0Not applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6

Extensive repairs performed by:None performed 1 128.0�� 1 041.8 52.0 12.2 22.0 2.8Company�owned maintenance facility 24.3�� 12.1 8.0 .7 3.5 24.7General repair business or private mechanic 108.2�� 103.9 1.6 S 2.7 16.6Dealership service department 42.9�� 36.7 S V 1.5 26.5Leasing company S�� S S S S S

Component distributorship (engine, transmission, body, etc.) S�� S S S S SIndividual not employed/paid by any repair type facility 81.7�� 81.0 S V .5 19.5Other V�� V V V V NNot reported S�� S V V V SNot applicable2 52.3�� 48.7 1.3 1.0 1.4 23.6

TRUCK TYPE AND AXLE ARRANGEMENTSingle�unit trucks and truck�tractors without trailer 1 457.0�� 1 366.8 64.3 15.4 10.5 1.2

2 axles 1 449.9�� 1 366.8 64.2 15.3 3.7 1.23 axles 5.0�� S S S 4.8 7.04 axles .3�� V V V .3 30.95 axles or more 1.7�� V V V 1.7 12.7Not reported .1�� V S S S 49.1

Combinations 43.0�� 17.1 S .5 20.9 20.7Single�unit trucks with trailer 26.2�� 17.1 S S S 34.0

3 axles S�� S S S V S4 axles 18.5�� 13.7 S S S 40.95 axles or more S�� V V V S SNot reported S�� V V V S S

Truck�tractors with single trailer 15.6�� V V .1 15.5 3.13 axles .9�� V V S .9 28.24 axles 1.4�� V V V 1.4 19.75 axles or more 12.2�� V V S 12.1 3.3Not reported 1.1�� V V S 1.0 16.5

Truck�tractors with double trailers 1.2�� V V V 1.2 22.85 axles .9�� V V V .9 27.46 axles .2�� V V V .2 40.17 axles S�� V V V S S8 axles or more S�� V V V S SNot reported V�� V V V V N

Truck�tractors with triple trailers V�� V V V V N7 axles V�� V V V V N8 axles V�� V V V V N9 axles V�� V V V V N10 axles or more V�� V V V V NNot reported V�� V V V V N







(percent)

TRUCK TYPE AND AXLE ARRANGEMENT�Con.Driving axles:

1 1 002.3�� 910.4 65.1 15.5 11.2 3.32 497.5�� 473.5 S S 20.1 6.53 or more S�� V V V S SNot reported .2�� S S S S 37.0

Total liftable axles and locations12:None 120.4�� 13.6 65.1 15.8 25.9 1.01 .5�� V S V .4 25.2

Forward of the drive axle .2�� V S V .1 40.1Below the chassis .1�� V V V .1 49.1Beyond the chassis S�� V V V S SNot reported S�� V V V S S

2 or more 1.7�� V V V 1.7 12.7Forward of the drive axle 1.6�� V V V 1.6 13.1Below the chassis S�� V V V S SBeyond the chassis 1.5�� V V V 1.5 13.7Not reported S�� V V V S S

Not reported .2�� V S S S 43.8Not applicable10 1 377.3�� 1 370.3 S V S 1.1

Total liftable axles and number of braking axles:None 120.4�� 13.6 65.1 15.8 25.9 1.01 .5�� V S V .4 25.2

0 braking S�� V V V S S1 braking .4�� V S V .3 27.1Not reported S�� V V V S S

2 or more 1.7�� V V V 1.7 12.70 braking V�� V V V V N1 braking V�� V V V V N2 or more braking 1.7�� V V V 1.7 12.8Not reported S�� V V V S S

Not reported .2�� V S S S 43.8Not applicable10 1 377.3�� 1 370.3 S V S 1.1

CAB TYPEConventional cab 110.4�� 12.3 61.8 14.8 21.5 1.2

With sleeper 4.6�� V V V 4.6 7.2Without sleeper 105.4�� 12.3 61.8 14.8 16.4 1.2Not reported .5�� V V S .5 24.4

Cab over engine 11.9�� 1.2 3.4 .9 6.5 4.7With sleeper 4.3�� V V S 4.2 7.5Without sleeper 7.5�� 1.2 3.4 .8 2.1 6.4Not reported .2�� V V V .2 43.8

Cab forward of engine S�� S V S S SCab beside engine V�� V V V V NNot reported .2�� S S V S 43.8Not applicable10 1 377.3�� 1 370.3 S V S 1.1


1Comparability of estimates may vary across survey years due to changes in category definitions.2Vehicles not in use.3Truck�tractors not in use.4Lessees or lessors of pickups, minivans, other light vans, and sport utilities.5Detail lines do not add to total trucks because items were not applicable or multiple responses were possible.6Includes pickups, minivans, other light vans, and sport utilities; all other vehicles that are private, rental, or used for personal transportation; and vehicles not in use.7Distributed miles data are available in Table 8.8Includes pickups, minivans, other light vans, and sport utilities; all other vehicles that are rental or used for personal transportation; and vehicles not in use.9Pickups, minivans, other light vans, and sport utilites, in the Equipment Type section, were only required to report for aerial work platform/bucket, air bag(s), air�conditioning, antilock brake




Note: The Appendix provides instructions for approximating unpublished coefficients of variation (CVs). CVs estimated from sample data are available on request. The Introductiongives information on confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be foundat www.census.gov/svsd/www/02vehinv.html.


Table 5. Trucks by Truck Type: 2002[Thousands. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]

Vehicular and operational characteristics

Truck type

Combination

Total

Single�unittrucks and

truck�tractorswithout trailer Total

Single�unittruck with

trailer

Truck�tractorwith single

trailer

Truck�tractorwith double

trailers

Truck�tractorwith triple

trailers

Coefficient ofvariation of

total(percent)

Total 1 500.1�� 1 457.0 43.0 26.2 15.6 1.2 V XCoefficient of variation (percent) 1.0�� 1.2 20.7 34.0 3.1 22.8 N X

BUSINESS1

For�hire transportation or warehousing 24.4�� 12.7 11.7 S 7.5 .8 V 27.9Vehicle leasing or rental 85.5�� 84.7 .9 V .9 V V 10.3Agriculture, forestry, fishing, or hunting 2.3�� 1.6 .7 S .4 .3 V 19.7Mining .8�� .6 .2 S .1 V V 26.4Utilities 23.5�� 23.1 .4 S .2 V V 35.0

Construction 83.3�� 76.8 S S 2.0 S V 17.6Manufacturing 22.6�� 22.1 .5 V .5 V V 36.5Wholesale trade 10.6�� S 1.4 S 1.4 V V 43.4Retail trade 31.6�� 23.9 S S .9 V V 29.8Information services S�� S S V S V V S

Waste management, landscaping, or administrative/support services 9.4� S .8 .7 .1 S V 48.9Arts, entertainment, or recreation services .8�� .7 .2 V .2 V V 38.0Accommodation or food services S�� S .2 V .2 V V SOther services 54.1�� 54.0 S V S V V 23.8Personal transportation 1 066.6�� 1 056.2 S S V V V 2.9Not reported 18.2�� 17.0 1.2 S 1.0 V V 36.0Not applicable2 52.3�� 52.3 V V V V V 23.6

BODY TYPE

Single�unit trucks 1 482.5�� 1 456.3 26.2 26.2 N N N 1.1Pickup 740.6�� 716.6 24.0 24.0 N N N 1.8Minivan 171.3�� 171.3 V V N N N 11.9Other light vans 90.5�� 90.5 V V N N N 17.6Sport utility 374.9�� 374.9 V V N N N 6.2Armored V�� V V V N N N N

Beverage .7�� .7 V V N N N 47.6Concrete mixer 1.6�� 1.6 V V N N N 13.0Concrete pumper .2�� .2 V V N N N 40.0Crane S�� S V V N N N SCurtainside S�� S V V N N N S

Dump 4.9�� 4.1 .8 .8 N N N 13.4Flatbed, stake, or platform 12.1�� 11.3 .8 .8 N N N 9.7Low boy V�� V V V N N N NPole, logging, pulpwood, or pipe V�� V V V N N N NService, utility 4.0�� 3.9 S S N N N 19.0

Service, other 2.9�� 2.9 V V N N N 21.3Street sweeper S�� S V V N N N STank, dry bulk .1�� .1 V V N N N 49.1Tank, liquids or gases 2.9�� 2.8 .2 .2 N N N 18.7Tow/Wrecker 1.2�� 1.2 V V N N N 34.8

Trash, garbage, or recycling 1.3�� 1.3 V V N N N 18.5Vacuum S�� S V V N N N SVan, basic enclosed 67.2�� 67.0 S S N N N 2.9Van, insulated nonrefrigerated S�� S V V N N N SVan, insulated refrigerated 1.4�� 1.4 V V N N N 30.5

Van, open top S�� S S S N N N SVan, step, walk�in, or multistop 3.1�� 3.1 V V N N N 20.6Van, other .6�� .6 V V N N N 48.7Other V�� V V V N N N N

Truck�tractors 17.5�� .7 16.8 N 15.6 1.2 V 3.0Automobile carrier .2�� N .2 N .2 V V 43.9Beverage .4�� N .4 N .4 V V 41.1Curtainside V�� N V N V V V NDump 2.0�� N 2.0 N 1.7 .2 V 12.0Flatbed, stake, or platform 2.3�� N 2.3 N 2.1 .2 V 12.5

Livestock S�� N S N S V V SLow boy .3�� N .3 N .3 V V 32.6Mobile home toter S�� N S N S V V SOpen top .2�� N .2 N .2 S V 37.1Pole, logging, pulpwood, or pipe V�� N V N V V V N

Tank, dry bulk .5�� N .5 N .1 S V 38.9Tank, liquids or gases .6�� N .6 N .6 V V 22.9Van, basic enclosed 8.5�� N 8.5 N 8.1 .4 V 5.1Van, drop�frame .2�� N .2 N .2 V V 43.9Van, insulated nonrefrigerated S�� N S N S V V S

Van, insulated refrigerated 1.5�� N 1.5 N 1.5 V V 16.7Other S�� N S N S V V SNot applicable3 .7�� .7 V N V V V 20.3

ANNUAL MILES

Less than 5,000 188.4�� 184.0 S S .5 S V 12.05,000 to 9,999 313.0�� 305.0 S S .9 S V 8.810,000 to 19,999 697.9�� 689.1 S S 1.2 S V 4.920,000 to 29,999 159.7�� 154.7 S S 1.1 S V 13.030,000 to 49,999 56.1�� 53.7 2.4 S 2.0 .1 V 22.6

50,000 to 74,999 17.3�� 14.4 2.9 S 2.8 .1 V 38.875,000 or more 15.4�� S 11.5 S 7.1 .7 V 31.4Not applicable2 52.3�� 52.3 V V V V V 23.6



Table 5. Trucks by Truck Type: 2002�Con.[Thousands. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]


Truck type

Combination

Total




trailer


trailer


trailers


trailers


total(percent)


Off�the�road 28.9�� 28.6 .3 S .2 S V 32.150 miles or less 902.7�� 889.8 12.8 S 3.9 .3 V 3.851 to 100 miles 177.0�� 171.4 S S 2.0 V V 12.1101 to 200 miles 59.2�� 57.6 1.6 S .9 .6 V 22.1201 to 500 miles 24.8�� 16.2 S S 1.5 .2 V 27.5

501 miles or more 48.2�� 39.6 8.5 S 5.1 S V 19.7Not reported 207.0�� 201.3 S S 2.1 V V 11.6Not applicable2 52.3�� 52.3 V V V V V 23.6


Operated in Canada .8�� .8 V V V V V 44.4Operated in Mexico S�� S S V S V V SOperated within the home base state 1 193.5�� 1 164.8 28.7 19.3 8.4 .9 V 2.4Operated in states other than the home base state 71.9�� 66.0 5.9 V 5.6 S V 14.0Not reported 174.7�� 166.3 S S 1.5 V V 12.7Not applicable2 52.3�� 52.3 V V V V V 23.6

MONTHS OPERATED

12 1 009.6�� 980.4 29.1 18.3 10.0 .8 V 3.37 to 11 247.3�� 243.0 4.3 .6 3.6 .2 V 10.32 to 6 158.3�� 149.1 S S 1.8 .2 V 13.41 or less 32.6�� 32.2 .4 S .2 V V 30.5Vehicle not used 52.3�� 52.3 V V V V V 23.6

VEHICLE SIZE

Light 1 383.9�� 1 366.8 17.1 17.1 V V V 1.2Medium 68.8�� 64.3 S S V V V 5.7Light�heavy 15.8�� 15.4 .5 S .1 V V 8.9Heavy�heavy 31.5�� 10.5 20.9 S 15.5 1.2 V 11.2


Less than 6,001 1 085.5�� 1 082.1 S S V V V 2.86,001 to 8,500 277.8�� 271.0 S S V V V 9.88,501 to 10,000 20.6�� 13.7 S S V V V 36.710,001 to 14,000 34.0�� 33.3 .7 .7 V V V 5.514,001 to 16,000 S�� 3.2 S S V V V S

16,001 to 19,500 28.2�� 27.8 S S V V V 6.319,501 to 26,000 15.8�� 15.4 .5 S .1 V V 8.926,001 to 33,000 S�� 2.6 S S S V V S33,001 to 40,000 1.9�� 1.4 .6 S .3 V V 20.240,001 to 50,000 3.4�� 1.9 1.5 S 1.4 S V 11.5

50,001 to 60,000 3.2�� 2.1 1.1 S .9 S V 9.360,001 to 80,000 16.3�� 2.6 13.7 .3 12.4 1.0 V 3.180,001 to 100,000 S�� V S V S V V S100,001 to 130,000 S�� V S V V S V S130,001 or more S�� V S V S V V S

TOTAL LENGTH (FEET)

Less than 20.0 1 267.9�� 1 267.9 V V V V V 1.920.0 to 27.9 155.6�� 151.8 S S V V V 12.128.0 to 35.9 44.1�� 33.3 S S .1 V V 14.036.0 to 40.9 4.1�� 2.9 1.2 S .8 V V 13.041.0 to 44.9 S�� .4 S S .8 V V S

45.0 to 49.9 S�� S S S .6 V V S50.0 to 54.9 2.0�� .6 1.4 S .9 S V 20.955.0 to 59.9 1.8�� V 1.8 S 1.8 S V 12.560.0 to 64.9 3.8�� V 3.8 .2 3.1 .4 V 9.165.0 to 69.9 1.6�� V 1.6 V 1.5 S V 13.4

70.0 to 74.9 6.2�� V 6.2 V 5.7 .5 V 6.175.0 to 79.9 .3�� V .3 V .3 S V 29.580.0 or more .1�� V .1 V .1 V V 49.1

MILES PER GALLON

Less than 5 5.9�� 4.1 1.8 S 1.6 .1 V 10.05 to 6.9 12.3�� 5.0 7.3 S 6.0 .9 V 6.77 to 8.9 30.0�� 23.8 6.2 .7 5.4 S V 5.79 to 10.9 123.9�� 112.9 S S .3 V V 13.011 to 12.9 120.2�� 119.8 S S V V V 15.613 to 14.9 138.0�� 130.9 S S S S V 14.415 or more 794.1�� 790.7 S S V V V 4.3

15 to 20.9 595.4�� 592.0 S S V V V 5.721 to 24.9 142.0�� 142.0 V V V V V 14.525 or more 56.7�� 56.7 V V V V V 23.8

Not reported 223.4�� 217.5 S S 2.1 S V 11.0Not applicable2 52.3�� 52.3 V V V V V 23.6





Truck type

Combination

Total




trailer


trailer


trailers


trailers


total(percent)

MODEL YEAR

2003 .7�� V .7 V .7 V V 20.12002 122.8�� 119.4 3.4 S 3.2 V V 15.22001 126.5�� 121.5 S S 1.5 .1 V 15.32000 179.6�� 177.9 1.7 S 1.1 S V 12.21999 103.7�� 99.3 S S .9 V V 17.0

1998 97.6�� 96.6 1.0 V .9 S V 17.41997 80.5�� 79.8 .8 V .7 S V 19.31996 90.9�� 89.8 1.1 S .8 S V 18.21995 65.8�� 64.5 1.3 S 1.2 S V 21.01994 63.0�� 62.1 .9 S .8 S V 21.31993 63.1�� 59.1 S S .4 S V 21.5Pre�1993 505.8�� 487.2 18.7 15.0 3.2 .5 V 6.2

VEHICLE ACQUISITION

New 690.2�� 669.1 21.1 S 9.5 .7 V 5.0Used 725.3�� 704.1 21.3 15.2 5.6 .5 V 4.8Not reported 84.5�� 83.9 .6 S .5 S V 18.9


Leased 134.8�� 128.9 5.9 S 5.2 .5 V 14.1Lessee 119.0�� 115.6 3.3 S 3.2 S V 15.4

Vehicle only 9.8�� 6.5 3.3 S 3.1 S V 9.7Vehicle with driver S�� V S V S V V SNot reported V�� V V V V V V NNot applicable4 109.1�� 109.1 V V V V V 16.8

Lessor 12.1�� 9.6 2.5 S 2.0 .4 V 39.1Vehicle only 5.4�� 2.9 2.4 S 1.9 .4 V 12.3Vehicle with driver .1�� S S V S V V 49.2Not reported V�� V V V V V V NNot applicable4 S�� S V V V V V S

Not reported S�� S S V S V V SNot leased 869.6�� 852.5 17.1 S 8.4 .6 V 4.0Not reported 495.7�� 475.6 20.0 17.9 2.0 .1 V 6.6

Length of leasing agreement:Leased 134.8�� 128.9 5.9 S 5.2 .5 V 14.1

1 to 11 months .8�� S .3 V .3 S V 35.312 months or more 14.6�� 9.0 5.6 S 5.0 .4 V 7.6Not reported S�� S S V S V V SNot applicable4 119.0�� 119.0 V V V V V 16.0

Provisions of lease5:Financing only 12.1�� 7.8 4.3 S 3.9 S V 8.6Full maintenance 4.0�� 2.2 1.8 V 1.5 S V 14.9Payment of taxes 5.4�� 3.1 2.3 S 1.8 S V 12.7Obtaining licenses and permits 4.9�� 2.8 2.1 S 1.6 S V 13.3Recordkeeping 4.4�� 1.6 2.8 S 2.5 S V 12.3Fuel contract 1.6�� 1.1 .5 V .5 V V 25.7

PRIMARY OPERATOR CLASSIFICATION

Private 263.4�� 242.2 21.2 15.5 5.5 .2 V 9.6Motor carrier 25.2�� 16.6 8.6 .1 7.6 .8 V 26.5Owner operator S�� S 1.8 S 1.5 .1 V SRental 85.9�� 84.9 1.0 V 1.0 V V 10.3Personal transportation 1 066.6�� 1 056.2 S S V V V 2.9Not applicable2 52.3�� 52.3 V V V V V 23.6


Contract 8.4�� 1.6 6.8 S 6.2 .5 V 7.3Common 5.5�� 2.5 3.0 S 2.5 .4 V 11.3Not reported 1.2�� .7 .5 S .4 S V 22.4Not applicable6 1 485.0�� 1 452.3 32.7 25.9 6.6 .2 V 1.1

Type of service:Truckload 10.3�� 1.8 8.6 S 7.8 .5 V 6.0Less�than truckload 3.1�� 1.8 1.3 V .9 .4 V 17.0Not reported 1.7�� 1.2 .5 S .4 S V 23.0Not applicable6 1 485.0�� 1 452.3 32.7 25.9 6.6 .2 V 1.1

Source of hauls:Shippers or receivers 10.7�� 2.7 8.0 S 7.3 .7 V 6.7Brokers .8�� S .7 V .7 S V 19.3Centralized markets or exchanges .4�� .1 .3 S .2 S V 28.3Other V�� V V V V V V NNot reported 3.2�� 1.9 1.3 S .9 .2 V 16.1Not applicable6 1 485.0�� 1 452.3 32.7 25.9 6.6 .2 V 1.1


Carrying hazardous materials 3.2�� 1.4 1.8 S 1.4 S V 16.2Not carrying hazardous materials 45.1�� 30.8 14.3 1.9 11.5 .9 V 3.9Not reported 6.3�� 4.4 1.9 S 1.6 S V 12.2Not applicable8 1 445.5�� 1 420.4 25.0 24.0 1.0 V V 1.1

EQUIPMENT TYPE5 9

Aerial work platform/bucket 1.2�� 1.2 V V V V V 35.7Air bag(s) (safety device only) 797.1�� 784.9 12.2 S 5.3 S V 4.2Air compressor (except air brakes) 4.5�� 3.0 1.5 S 1.5 S V 14.2Air�conditioning 1 299.4�� 1 258.9 40.5 25.0 14.3 1.1 V 2.0Air springs 22.0�� 13.2 8.8 .1 8.3 .4 V 6.1





Truck type

Combination

Total




trailer


trailer


trailers


trailers


total(percent)


Antilock brake system 849.9�� 832.7 17.2 S 9.5 .4 V 4.0Collision warning system .6�� S S V S V V 48.7Computerized drive train control unit 193.7�� 189.4 S S .8 S V 12.1Crane 1.0�� 1.0 S V S V V 31.9Electronic vehicle identification device 1.4�� .7 .7 V .7 V V 22.8

Engine retarder/brake 15.0�� 3.5 11.5 .2 10.6 .7 V 3.8Front�wheel drive 476.2�� 469.4 S S V V V 6.8Hoist 2.2�� 2.1 .1 .1 V V V 18.0Idle�reducing technology (portable auxiliary pack, electrification, etc.) 5.4� .9 4.5 S 4.5 S V 8.4Internet access .2�� V .2 V .2 V V 43.8

Lift gate 4.8�� 4.8 S S V V V 15.4Mounting bar for snowplow S�� S V V V V V SNavigational system .2�� .2 V V V V V 40.0Power take�off 11.5�� 8.5 2.9 .8 2.2 V V 7.4Radial tires 996.5�� 961.2 35.2 21.6 12.8 .8 V 3.4

Reflective material in addition to those required by law 10.8�� 4.9 5.9 S 5.1 .6 V 7.2Road speed governor 51.9�� 41.3 10.7 S 9.8 .5 V 3.8Toolbox 187.8�� 173.3 14.4 S 2.9 .2 V 11.7Trip recorder or on�board computer with communication capabilities 42.6�� 37.2 5.3 V 5.1 S V 25.2Trip recorder or on�board computer without communicationcapabilities 241.7�� 237.4 S S .8 V V 10.5

Vehicle control aids for handicapped drivers V�� V V V V V V NWheelchair lift S�� S V V V V V SWinch 11.7�� S .2 V .2 V V 49.7

Transmission type:Automatic 1 096.9�� 1 075.3 21.7 21.2 .5 V V 2.8Manual 354.9�� 334.9 20.0 S 13.9 1.2 V 7.6Semiautomated manual S�� S S V S V V SAutomated manual S�� S S V S V V SNot reported 41.5�� 40.4 1.1 S 1.0 V V 26.5

Braking system:Hydraulic (standard) 14.8�� 13.9 .9 .7 .3 V V 8.7Hydraulic with power assist 74.7�� 74.0 .7 S .1 V V 2.4Air 28.1�� 11.8 16.3 .9 14.2 1.2 V 3.7Other V�� V V V V V V NNot reported 5.1�� 4.0 1.1 S 1.0 V V 13.9Not applicable10 1 377.3�� 1 353.3 24.0 24.0 V V V 1.1


Fuel type:Gasoline 1 315.1�� 1 297.3 17.8 17.8 V V V 1.7Diesel 111.1�� 86.0 25.1 S 15.6 1.2 V 9.7Natural gas V�� V V V V V V NPropane S�� S S S V V V SAlcohol fuels V�� V V V V V V N

Electricity V�� V V V V V V NCombination 17.2�� 17.2 S S V V V 42.8Other V�� V V V V V V NNot reported V�� V V V V V V NNot applicable2 52.3�� 52.3 V V V V V 23.6

Cylinders11:4 cylinders 194.2�� 194.1 .1 .1 V V V 12.16 cylinders 632.9�� 612.7 20.2 S 15.0 1.1 V 5.18 cylinders 638.1�� 616.1 22.0 21.8 .2 V V 5.2Other 34.8�� 34.1 .7 S .4 S V 27.3

Cubic inch displacement11:Gasoline fuel 1 315.1�� 1 297.3 17.8 17.8 V V V 1.7

Less than 200 349.1�� 349.1 V V V V V 8.5200 to 299 437.6�� 437.6 V V V V V 7.0300 to 349 221.8�� 215.0 S S V V V 11.2350 to 399 216.3�� 215.5 .8 .8 V V V 11.1400 or more 54.7�� 44.5 S S V V V 21.2Not available 35.7�� 35.7 V V V V V 29.4

Diesel fuel 111.1�� 86.0 25.1 S 15.6 1.2 V 9.7Less than 400 27.0�� 20.0 S S V V V 30.5400 to 599 62.7�� 60.6 2.0 .8 1.2 S V 11.3600 to 799 12.9�� 3.4 9.5 .2 8.7 .7 V 4.2800 or more 6.2�� .9 5.2 S 4.8 .3 V 6.2Not available 2.4�� 1.1 1.3 S .9 .2 V 12.4

Other fuel 21.4�� 21.4 S S V V V 37.8Less than 400 20.6�� 20.6 S S V V V 39.3400 or more .7�� .7 V V V V V 47.6Not available S�� S S S V V V S

Not reported V�� V V V V V V NNot applicable2 52.3�� 52.3 V V V V V 23.6

REFUELING LOCATION

Gas station 1 318.0�� 1 291.4 26.6 25.3 1.3 V V 1.9Truck stop 13.9�� S 4.3 S 4.0 .3 V 34.8Own facility (including home, farm, ranch, onsite by mobile supplier,etc.) 39.5�� 29.6 10.0 .4 8.6 .9 V 19.2

Other company’s/contractor’s facility not open to the public 18.1�� 16.4 1.7 S 1.3 S V 37.6Other V�� V V V V V V NNot reported 58.1�� 57.7 .4 S .4 V V 23.1Not applicable2 52.3�� 52.3 V V V V V 23.6





Truck type

Combination

Total




trailer


trailer


trailers


trailers


total(percent)

MAINTENANCE5

General maintenance performed by:None performed 21.1�� 21.1 V V V V V 39.0Company�owned maintenance facility 191.2�� 171.5 19.6 S 11.2 .8 V 9.3General repair business or private mechanic 602.1�� 582.4 19.6 S 7.9 .6 V 5.7Dealership service department 386.7�� 377.2 9.5 S 5.5 S V 7.7Leasing company S�� S .2 V .2 V V S

Individual not employed/paid by any maintenance type facility 456.2�� 447.2 S S 1.3 .2 V 7.0Other V�� V V V V V V NNot reported 64.2�� 63.8 .3 S .3 V V 22.0Not applicable2 52.3�� 52.3 V V V V V 23.6

Extensive repairs performed by:None performed 1 128.0�� 1 097.3 30.7 18.7 11.2 .7 V 2.8Company�owned maintenance facility 24.3�� 22.5 1.9 S 1.2 S V 24.7General repair business or private mechanic 108.2�� 103.1 S S 1.5 .1 V 16.6Dealership service department 42.9�� 38.3 S S .9 S V 26.5Leasing company S�� S S V S V V S

Component distributorship (engine, transmission, body, etc.) S�� S S S .2 V V SIndividual not employed/paid by any repair type facility 81.7�� 81.2 .5 S .3 S V 19.5Other V�� V V V V V V NNot reported S�� S V V V V V SNot applicable2 52.3�� 52.3 V V V V V 23.6

AXLE ARRANGEMENT

Driving axles:1 1 002.3�� 979.5 22.8 19.1 2.7 1.0 V 3.32 497.5�� 477.3 20.2 S 12.9 .2 V 6.53 or more S�� S V V V V V SNot reported .2�� .2 S S V V V 37.0

Total liftable axles and locations12:None 120.4�� 101.5 18.9 2.2 15.6 1.2 V 1.01 .5�� .4 S V S V V 25.2

Forward of the drive axle .2�� .2 S V S V V 40.1Below the chassis .1�� .1 V V V V V 49.1Beyond the chassis S�� S V V V V V SNot reported S�� S S V S V V S

2 or more 1.7�� 1.7 V V V V V 12.7Forward of the drive axle 1.6�� 1.6 V V V V V 13.1Below the chassis S�� S V V V V V SBeyond the chassis 1.5�� 1.5 V V V V V 13.7Not reported S�� S V V V V V S

Not reported .2�� .1 S S V V V 43.8Not applicable10 1 377.3�� 1 353.3 24.0 24.0 V V V 1.1

Total liftable axles and number of braking axles:None 120.4�� 101.5 18.9 2.2 15.6 1.2 V 1.01 .5�� .4 S V S V V 25.2

0 braking S�� S V V V V V S1 braking .4�� .4 S V S V V 27.1Not reported S�� V S V S V V S

2 or more 1.7�� 1.7 V V V V V 12.70 braking V�� V V V V V V N1 braking V�� V V V V V V N2 or more braking 1.7�� 1.7 V V V V V 12.8Not reported S�� S V V V V V S

Not reported .2�� .1 S S V V V 43.8Not applicable10 1 377.3�� 1 353.3 24.0 24.0 V V V 1.1

CAB TYPE

Conventional cab 110.4�� 96.5 14.0 1.9 10.9 1.1 V 1.2With sleeper 4.6�� .1 4.5 V 4.3 .1 V 7.2Without sleeper 105.4�� 96.3 9.1 1.9 6.2 .9 V 1.2Not reported .5�� S .4 V .4 V V 24.4

Cab over engine 11.9�� 6.9 5.0 .2 4.7 .1 V 4.7With sleeper 4.3�� S 4.2 V 4.2 S V 7.5Without sleeper 7.5�� 6.8 .7 .2 .3 S V 6.4Not reported .2�� V .2 V .2 V V 43.8

Cab forward of engine S�� S V V V V V SCab beside engine V�� V V V V V V NNot reported .2�� .1 S S V V V 43.8Not applicable10 1 377.3�� 1 353.3 24.0 24.0 V V V 1.1


1Comparability of estimates may vary across survey years due to changes in category definitions.2Vehicles not in use. When the respondent had partial�year ownership of the vehicle, annual miles were adjusted to reflect miles traveled when not owned by the respondent.3Truck�tractors not in use.4Lessees or lessors of pickups, minivans, other light vans, and sport utilities.5Detail lines do not add to total trucks because items were not applicable or multiple responses were possible.6Includes pickups, minivans, other light vans, and sport utilities; all other vehicles that are private, rental, or used for personal transportation; and vehicles not in use.7Distributed miles data are available in Table 8.8Includes pickups, minivans, other light vans, and sport utilities; all other vehicles that are rental or used for personal transportation; and vehicles not in use.9Pickups, minivans, other light vans, and sport utilites, in the Equipment Type section, were only required to report for aerial work platform/bucket, air bag(s), air�conditioning, antilock brake






Table 6. Truck Miles by Vehicle Size: 2002[Millions. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]




(percent)

Total 20 204.8�� 17 508.4 1 061.7 254.6 1 380.1 XCoefficient of variation (percent) 3.6�� 3.9 25.9 10.8 4.1 X

BUSINESS1

For�hire transportation or warehousing 1 358.3�� S S 17.2 738.1 24.2Vehicle leasing or rental 1 163.1�� 438.1 532.4 130.3 62.3 13.8Agriculture, forestry, fishing, or hunting 49.4�� S S S 33.5 21.2Mining 14.0�� V S V 10.0 36.9Utilities 573.2�� 521.9 14.6 S 27.7 38.0

Construction 1 531.7�� 1 251.0 79.9 26.8 174.1 18.6Manufacturing S�� S S 10.4 15.8 SWholesale trade 202.4�� S 19.4 17.4 71.0 32.3Retail trade 582.4�� 429.4 35.4 S 105.3 29.9Information services S�� S S V S S

Waste management, landscaping, or administrative/support services 178.3�� S S S 36.7 45.3Arts, entertainment, or recreation services 8.2�� S S V S 43.7Accommodation or food services S�� S S S 13.2 SOther services 967.4�� 956.0 9.7 V S 30.0Personal transportation 12 226.1�� 12 224.9 S V V 4.6Not reported 433.0�� S 14.7 26.4 81.2 47.7Not applicable2 S�� S S V S S

BODY TYPESingle�unit trucks 19 042.0�� 17 508.4 1 061.7 246.6 225.4 3.8

Pickup 9 316.9�� 9 015.2 S V S 6.6Minivan 2 375.8�� 2 375.8 V V V 13.9Other light vans 1 082.2�� 1 082.2 V V V 21.8Sport utility 4 880.2�� 4 880.2 V V V 8.5Armored V�� V V V V N

Beverage S�� V V S S SConcrete mixer 36.9�� V V V 36.9 14.8Concrete pumper S�� V V V S SCrane S�� V V S S SCurtainside V�� V V V V N

Dump 73.1�� S S S 49.4 20.3Flatbed, stake, or platform 156.5�� 33.0 50.7 44.4 28.4 12.2Low boy V�� V V V V NPole, logging, pulpwood, or pipe V�� V V V V NService, utility 56.7�� S 31.5 S S 25.6

Service, other 43.6�� 13.8 27.4 S S 27.6Street sweeper S�� V S V V STank, dry bulk S�� V V V S STank, liquids or gases 31.2�� S S S 26.5 26.7Tow/Wrecker 17.8�� V S S S 49.8

Trash, garbage, or recycling 26.0�� V S V 25.6 21.3Vacuum S�� V S V S SVan, basic enclosed 837.9�� 81.8 592.7 153.9 S 4.1Van, insulated nonrefrigerated S�� V S V V SVan, insulated refrigerated 31.0�� S 16.4 S S 30.6

Van, open top S�� V S S V SVan, step, walk�in, or multistop 46.8�� S 31.3 S S 24.7Van, other S�� S S S S SOther V�� V V V V N

Truck�tractors 1 162.8�� V V 8.0 1 154.8 4.1Automobile carrier S�� V V V S SBeverage 4.9�� V V V 4.9 41.4Curtainside V�� V V V V NDump 95.1�� V V V 95.1 14.1Flatbed, stake, or platform 99.7�� V V S 97.6 15.2

Livestock S�� V V V S SLow boy 20.1�� V V V 20.1 36.7Mobile home toter S�� V V S S SOpen top 8.2�� V V S S 46.2Pole, logging, pulpwood, or pipe V�� V V V V N

Tank, dry bulk 36.0�� V V V 36.0 39.6Tank, liquids or gases 39.8�� V V V 39.8 27.5Van, basic enclosed 720.8�� V V V 720.8 6.3Van, drop�frame S�� V V V S SVan, insulated nonrefrigerated S�� V V V S S

Van, insulated refrigerated 111.4�� V V S 109.5 16.2Other S�� V V V S SNot applicable3 V�� V V V V N

ANNUAL MILESLess than 5,000 377.5�� 349.2 17.0 5.0 6.2 14.75,000 to 9,999 2 369.2�� 2 128.7 184.5 11.7 S 9.010,000 to 19,999 9 281.4�� 8 817.5 346.8 64.8 52.2 5.120,000 to 29,999 3 631.2�� 3 284.2 132.4 136.0 78.6 13.130,000 to 49,999 1 934.8�� 1 719.4 54.7 23.5 137.1 22.7

50,000 to 74,999 955.0�� 728.6 S 11.0 192.7 38.075,000 or more 1 525.4�� S S S 867.9 28.8Not applicable2 S�� S S V S S

PRIMARY RANGE OF OPERATIONOff�the�road 239.9�� 208.7 S S 20.4 38.850 miles or less 11 662.4�� 10 985.3 285.8 91.6 299.7 5.451 to 100 miles 2 603.9�� 2 319.7 159.9 S 114.0 14.2101 to 200 miles 1 095.0�� 926.2 40.9 S 122.1 26.6201 to 500 miles 623.1�� S S 14.1 164.8 44.8

501 miles or more 1 416.3�� S 183.4 82.2 524.0 25.5Not reported 2 433.9�� 2 233.1 19.2 47.5 134.1 12.8Not applicable2 S�� S S V S S



Table 6. Truck Miles by Vehicle Size: 2002�Con.[Millions. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]




(percent)

PRIMARY JURISDICTIONOperated in Canada 9.5�� S S S V 46.7Operated in Mexico S�� S V V S SOperated within the home base state 16 283.7�� 14 857.8 648.5 110.8 666.6 4.4Operated in states other than the home base state 1 809.3�� 749.5 358.9 94.3 606.6 20.5Not reported 1 857.8�� 1 659.7 45.1 47.8 105.3 13.4Not applicable2 S�� S S V S S

MONTHS OPERATED12 14 619.6�� 12 420.2 994.6 222.3 982.6 4.87 to 11 3 621.4�� 3 249.8 43.9 28.5 299.2 13.82 to 6 1 727.7�� 1 617.8 16.4 2.3 91.2 17.91 or less 105.8�� S S S 6.1 49.8Vehicle not used S�� S S V S S

AVERAGE WEIGHT (POUNDS)Less than 6,001 13 235.0�� 13 235.0 N N N 5.36,001 to 8,500 4 049.8�� 4 049.8 N N N 12.08,501 to 10,000 223.7�� 223.7 N N N 36.710,001 to 14,000 384.7�� N 384.7 N N 7.614,001 to 16,000 S�� N S N N S

16,001 to 19,500 341.3�� N 341.3 N N 7.619,501 to 26,000 254.6�� N N 254.6 N 10.826,001 to 33,000 77.2�� N N N 77.2 40.233,001 to 40,000 33.3�� N N N 33.3 31.540,001 to 50,000 86.5�� N N N 86.5 19.6

50,001 to 60,000 77.3�� N N N 77.3 14.760,001 to 80,000 1 087.5�� N N N 1 087.5 4.280,001 to 100,000 S�� N N N S S100,001 to 130,000 S�� N N N S S130,001 or more S�� N N N S S

TOTAL LENGTH (FEET)Less than 20.0 16 007.3�� 15 792.1 132.1 68.3 14.8 4.420.0 to 27.9 2 011.2�� 1 551.6 344.2 69.6 45.8 15.528.0 to 35.9 565.5�� S 299.0 95.1 86.3 12.736.0 to 40.9 112.5�� S S S 92.5 16.141.0 to 44.9 S�� S S S 41.0 S

45.0 to 49.9 S�� V S S 24.4 S50.0 to 54.9 68.3�� V S V 67.1 20.855.0 to 59.9 80.1�� V V V 80.1 15.560.0 to 64.9 199.8�� V V V 199.8 11.965.0 to 69.9 103.9�� V V S 102.0 16.1

70.0 to 74.9 596.2�� V V V 596.2 7.275.0 to 79.9 24.4�� V V V 24.4 31.980.0 or more S�� V V S S S

MILES PER GALLONLess than 5 145.1�� S S S 128.7 10.65 to 6.9 541.9�� S S 16.3 507.0 7.57 to 8.9 859.6�� 7.7 235.4 103.7 512.9 5.69 to 10.9 1 266.9�� 796.6 393.6 42.7 33.9 15.611 to 12.9 1 549.9�� 1 472.8 58.6 S 9.7 19.513 to 14.9 1 991.4�� 1 678.3 S 16.4 S 19.615 or more 10 709.8�� 10 683.9 24.7 S S 6.1

15 to 20.9 7 772.0�� 7 746.1 24.7 S S 7.621 to 24.9 2 038.2�� 2 038.2 V V V 17.325 or more 899.5�� 899.5 V V V 30.1

Not reported 3 009.8�� 2 731.9 48.5 56.9 172.5 15.4Not applicable2 S�� S S V S S

MODEL YEAR2003 58.6�� V V V 58.6 21.42002 2 147.3�� 1 745.3 14.1 S 380.0 14.62001 2 127.2�� 1 948.5 13.8 17.0 147.9 16.72000 2 897.3�� 2 588.8 78.0 100.7 129.9 12.91999 2 007.3�� 1 605.4 S 19.5 85.9 24.9

1998 1 307.3�� 1 160.8 50.3 S 93.5 18.11997 1 328.6�� 1 219.5 35.6 S 57.4 21.71996 1 397.7�� 1 295.8 20.2 S 76.9 20.01995 871.5�� 749.2 53.6 S 60.7 22.11994 733.0�� 608.5 67.7 S 52.3 21.31993 744.2�� 643.4 57.5 S 38.9 21.9Pre�1993 4 584.8�� 3 943.2 374.5 68.8 198.3 10.4

VEHICLE ACQUISITIONNew 10 299.4�� 8 204.5 963.3 170.7 960.9 6.8Used 8 422.6�� 7 902.6 73.9 66.1 380.1 6.8Not reported 1 482.8�� 1 401.3 24.5 17.8 39.2 23.3

LEASE CHARACTERISTICSLeased 2 579.6�� 1 920.2 94.1 83.9 481.4 13.5

Lessee 2 130.5�� 1 726.0 80.0 42.1 282.3 15.4Vehicle only 410.8�� 8.8 80.0 42.1 279.9 8.8Vehicle with driver S�� V V V S SNot reported V�� V V V V NNot applicable4 1 717.2�� 1 717.2 V V V 19.0

Lessor 382.1�� S 8.9 38.2 191.8 28.5Vehicle only 226.1�� S 8.9 38.2 177.2 11.5Vehicle with driver S�� V V V S SNot reported V�� V V V V NNot applicable4 S�� S V V V S

Not reported S�� S S S S SNot leased 10 766.3�� 9 247.4 617.7 145.6 755.5 5.6Not reported 6 859.0�� 6 340.8 S 25.0 143.2 9.9







(percent)

LEASE CHARACTERISTICS�Con.Length of leasing agreement:

Leased 2 579.6�� 1 920.2 94.1 83.9 481.4 13.51 to 11 months 26.0�� V S V 23.2 29.712 months or more 634.9�� 10.6 86.6 80.3 457.3 6.8Not reported S�� V S S S SNot applicable4 1 909.5�� 1 909.5 V V V 18.1

Provisions of lease5:Financing only 511.7�� 10.6 77.6 68.8 354.7 7.5Full maintenance 176.2�� V 9.9 37.3 129.0 13.7Payment of taxes 224.3�� 3.1 21.7 37.9 161.6 11.9Obtaining licenses and permits 207.4�� S 14.7 37.9 152.6 12.5Recordkeeping 283.0�� S 10.4 28.6 243.7 10.1Fuel contract 54.4�� V S 16.6 31.7 22.0

PRIMARY OPERATOR CLASSIFICATIONPrivate 5 358.6�� 4 363.9 S 105.2 432.0 12.8Motor carrier 1 058.5�� 251.9 34.7 14.0 757.9 12.5Owner operator 258.7�� S S S 117.5 40.7Rental 1 172.5�� 438.1 532.4 130.3 71.7 13.7Personal transportation 12 226.1�� 12 224.9 S V V 4.6Not applicable2 S�� S S V S S


Contract 678.7�� S 45.8 S 621.1 6.7Common 253.5�� S 14.5 S 223.1 12.7Not reported 42.8�� S S S 31.1 21.5Not applicable6 19 229.9�� 17 495.0 994.6 235.5 504.8 3.8

Type of service:Truckload 782.2�� V S S 750.5 5.6Less�than truckload 141.2�� S S S 90.7 21.8Not reported 51.5�� V 11.9 S 34.1 21.3Not applicable6 19 229.9�� 17 495.0 994.6 235.5 504.8 3.8

Source of hauls:Shippers or receivers 804.0�� S 33.5 12.7 744.4 6.3Brokers 62.3�� V V S 60.6 21.6Centralized markets or exchanges 14.8�� V S V 13.8 32.8Other V�� V V V V NNot reported 93.9�� V 32.6 S 56.6 18.6Not applicable6 19 229.9�� 17 495.0 994.6 235.5 504.8 3.8


Carrying hazardous materials 132.8�� S S S 121.2 20.3Not carrying hazardous materials 1 434.3�� 79.4 229.7 95.2 1 030.0 3.9Not reported 176.3�� 3.9 21.7 22.5 128.3 12.1Not applicable8 18 461.4�� 17 420.8 809.7 130.3 100.7 3.9

EQUIPMENT TYPE5 9

Aerial work platform/bucket S�� V S S S SAir bag(s) (safety device only) 12 146.1�� 11 287.7 S 24.6 516.1 6.0Air compressor (except air brakes) 150.7�� S 23.1 9.8 117.4 13.8Air�conditioning 18 672.6�� 16 154.8 1 003.1 202.7 1 312.0 4.1Air springs 949.0�� S 116.0 S 825.5 5.0

Antilock brake system 13 236.3�� 11 615.4 649.3 71.3 900.3 5.6Collision warning system 14.4�� V S S S 42.1Computerized drive train control unit 2 908.0�� 2 826.1 8.2 S 68.6 13.6Crane 19.0�� V S S 10.4 34.9Electronic vehicle identification device 83.2�� V S S 63.0 21.0

Engine retarder/brake 960.5�� S 11.5 15.8 929.1 4.5Front�wheel drive 6 116.9�� 5 844.3 S V V 9.5Hoist 35.3�� S S S 26.5 20.5Idle�reducing technology (portable auxiliary pack, electrification, etc.) 472.3�� V S S 466.1 7.6Internet access 17.8�� V V V 17.8 44.1

Lift gate 91.5�� S 31.8 41.1 10.7 16.7Mounting bar for snowplow S�� S V V S SNavigational system 6.6�� V V V 6.6 42.1Power take�off 289.4�� S S 22.0 256.0 8.3Radial tires 14 036.8�� 11 737.9 948.1 192.7 1 158.1 5.1

Reflective material in addition to those required by law 644.8�� S 19.7 16.9 599.1 7.1Road speed governor 1 404.8�� S 399.1 60.8 933.6 3.8Toolbox 3 148.3�� 2 491.4 S 41.1 223.1 15.0Trip recorder or on�board computer with communication capabilities 1 177.2�� 602.9 S S 571.8 16.6Trip recorder or on�board computer without communication capabilities 3 257.3�� 3 155.6 S V 97.9 12.3

Vehicle control aids for handicapped drivers V�� V V V V NWheelchair lift S�� S V V V SWinch S�� S S S 13.7 S

Transmission type:Automatic 14 321.7�� 13 577.2 544.6 120.9 79.0 4.8Manual 5 205.4�� 3 402.4 S 94.4 1 206.2 9.9Semiautomated manual S�� S V V S SAutomated manual S�� S V V S SNot reported 590.0�� 457.7 14.7 39.2 78.5 23.8

Braking system:Hydraulic (standard) 203.8�� 45.4 97.7 44.8 16.0 12.0Hydraulic with power assist 906.2�� 101.7 663.7 126.1 14.6 3.8Air 1 298.3�� S S 46.3 1 242.0 3.9Other V�� V V V V NNot reported 141.4�� S 16.5 37.4 79.7 13.4Not applicable10 17 655.1�� 17 353.4 S V S 4.1







(percent)

FUEL TYPE AND ENGINE SIZEFuel type:

Gasoline 17 249.1�� 16 828.7 270.3 121.2 S 4.1Diesel 2 610.8�� 362.5 770.7 130.0 1 347.6 11.5Natural gas V�� V V V V NPropane S�� S S S S SAlcohol fuels V�� V V V V N

Electricity V�� V V V V NCombination 164.3�� 157.3 5.1 V S 47.0Other V�� V V V V NNot reported V�� V V V V NNot applicable2 S�� S S V S S

Cylinders11:4 cylinders 2 582.0�� 2 538.8 37.3 S 3.9 15.06 cylinders 9 448.6�� 7 696.0 S 121.6 1 302.6 6.58 cylinders 7 901.8�� 7 065.4 668.2 119.6 S 8.0Other 272.4�� S 27.8 11.4 25.0 39.1

Cubic inch displacement11:Gasoline fuel 17 249.1�� 16 828.7 270.3 121.2 S 4.1

Less than 200 4 566.9�� 4 550.5 V 16.4 V 10.8200 to 299 6 388.0�� 6 388.0 V V V 9.7300 to 349 2 538.0�� 2 538.0 S V S 13.8350 to 399 2 799.2�� 2 654.5 126.5 17.4 S 14.6400 or more 753.8�� 499.7 143.3 83.0 S 23.6Not available 203.1�� 197.9 S 4.4 S 38.5

Diesel fuel 2 610.8�� 362.5 770.7 130.0 1 347.6 11.5Less than 400 S�� 162.9 S 26.2 S S400 to 599 793.8�� 198.9 429.2 89.7 76.0 12.3600 to 799 856.8�� V V S 851.3 5.5800 or more 340.1�� V V S 338.6 8.1Not available 77.3�� S V S 69.6 16.8

Other fuel 214.5�� 191.4 17.2 S S 39.4Less than 400 204.6�� 191.4 12.4 V S 41.3400 or more S�� V S S S SNot available S�� V S V V S

Not reported V�� V V V V NNot applicable2 S�� S S V S S

REFUELING LOCATIONGas station 17 406.2�� 16 167.7 958.1 166.6 113.8 4.3Truck stop 460.8�� S 10.4 12.8 316.0 19.6Own facility (including home, farm, ranch, onsite by mobile supplier, etc.) 1 183.8�� 207.7 71.2 52.1 852.8 8.4Other company’s/contractor’s facility not open to the public 398.0�� S 14.4 14.0 75.5 38.3Other V�� V V V V NNot reported 625.6�� 591.5 S S 21.1 24.3Not applicable2 S�� S S V S S

MAINTENANCE5

General maintenance performed by:None performed S�� S S V S SCompany�owned maintenance facility 3 463.9�� 1 628.2 610.5 192.1 1 033.0 8.9General repair business or private mechanic 9 000.2�� 8 010.1 160.1 43.7 786.4 6.7Dealership service department 6 189.0�� 5 294.8 S 13.5 557.8 9.0Leasing company 49.5�� S S 14.5 12.3 44.5

Individual not employed/paid by any maintenance type facility 5 363.6�� 5 196.3 45.4 S 114.7 10.9Other V�� V V V V NNot reported 698.3�� 680.3 S V 12.9 23.4Not applicable2 S�� S S V S S

Extensive repairs performed by:None performed 15 200.1�� 13 361.2 633.6 193.2 1 012.1 4.1Company�owned maintenance facility 313.5�� S 82.1 13.5 109.1 19.2General repair business or private mechanic 1 785.4�� 1 618.6 30.0 S 132.4 19.1Dealership service department 1 249.4�� 851.6 S V 103.8 32.4Leasing company S�� S S S S S

Component distributorship (engine, transmission, body, etc.) S�� S S S 12.7 SIndividual not employed/paid by any repair type facility 599.0�� 568.1 S V 28.2 24.8Other V�� V V V V NNot reported S�� S V V V SNot applicable2 S�� S S V S S

TRUCK TYPE AND AXLE ARRANGEMENTSingle�unit trucks and truck�tractors without trailer 18 485.6�� 17 306.0 771.3 239.2 169.1 3.7

2 axles 18 361.1�� 17 306.0 771.1 238.8 45.1 3.83 axles 72.8�� V S S 72.3 12.24 axles 6.3�� V V V 6.3 42.55 axles or more 43.8�� V V V 43.8 13.9Not reported S�� V V V S S

Combinations 1 719.2�� 202.4 S 15.4 1 211.0 17.1Single�unit trucks with trailer S�� 202.4 S S S S

3 axles S�� S S S V S4 axles S�� S S S S S5 axles or more S�� V V V S SNot reported S�� V V V S S

Truck�tractors with single trailer 1 070.0�� V V 8.0 1 062.0 3.93 axles 26.5�� V V S S 48.24 axles 51.2�� V V V 51.2 23.95 axles or more 945.5�� V V S 941.0 4.3Not reported 46.9�� V V S 45.3 20.0

Truck�tractors with double trailers 92.7�� V V V 92.7 29.35 axles 82.6�� V V V 82.6 32.46 axles S�� V V V S S7 axles S�� V V V S S8 axles or more S�� V V V S SNot reported V�� V V V V N







(percent)

TRUCK TYPE AND AXLE ARRANGEMENT�Con.Combinations�Con.

Truck�tractors with triple trailers V�� V V V V N7 axles V�� V V V V N8 axles V�� V V V V N9 axles V�� V V V V N10 axles or more V�� V V V V NNot reported V�� V V V V N

Driving axles:1 12 951.9�� 11 654.8 787.9 248.4 260.8 5.52 7 251.1�� 5 853.6 S S 1 117.5 8.03 or more S�� V V V S SNot reported S�� S V V S S

Total liftable axles and locations12:None 2 495.2�� 155.0 787.7 254.6 1 297.9 2.41 10.5�� V S V 10.3 38.4

Forward of the drive axle S�� V S V S SBelow the chassis S�� V V V S SBeyond the chassis S�� V V V S SNot reported S�� V V V S S

2 or more 43.8�� V V V 43.8 13.9Forward of the drive axle 41.4�� V V V 41.4 14.4Below the chassis S�� V V V S SBeyond the chassis 37.5�� V V V 37.5 15.0Not reported S�� V V V S S

Not reported S�� V V V S SNot applicable10 17 655.1�� 17 353.4 S V S 4.1

Total liftable axles and number of braking axles:None 2 495.2�� 155.0 787.7 254.6 1 297.9 2.41 10.5�� V S V 10.3 38.4

0 braking S�� V V V S S1 braking 9.6�� V S V 9.4 41.4Not reported S�� V V V S S

2 or more 43.8�� V V V 43.8 13.90 braking V�� V V V V N1 braking V�� V V V V N2 or more braking 42.9�� V V V 42.9 14.1Not reported S�� V V V S S

Not reported S�� V V V S SNot applicable10 17 655.1�� 17 353.4 S V S 4.1

CAB TYPEConventional cab 1 963.3�� 130.2 720.3 237.9 874.9 2.8

With sleeper 339.2�� V V V 339.2 8.6Without sleeper 1 596.9�� 130.2 720.3 237.9 508.5 3.2Not reported 27.2�� V V V 27.2 28.2

Cab over engine 580.7�� 24.2 67.5 14.9 474.0 6.4With sleeper 406.3�� V V S 404.8 8.5Without sleeper 158.5�� 24.2 67.5 13.4 53.4 8.7Not reported 15.9�� V V V 15.9 44.5

Cab forward of engine S�� S V S S SCab beside engine V�� V V V V NNot reported S�� V V V S SNot applicable10 17 655.1�� 17 353.4 S V S 4.1








Table 7. Truck Miles by Truck Type: 2002[Millions. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]


Truck type

Combination

Total




trailer


trailer


trailers


trailers


total(percent)

Total 20 204.8�� 18 485.6 1 719.2 S 1 070.0 92.7 V XCoefficient of variation (percent) 3.6�� 3.7 17.1 S 3.9 29.3 N X

BUSINESS1

For�hire transportation or warehousing 1 358.3�� S 1 008.0 S 658.5 76.0 V 24.2Vehicle leasing or rental 1 163.1�� 1 117.8 45.3 V 45.3 V V 13.8Agriculture, forestry, fishing, or hunting 49.4�� 19.6 29.7 S 19.3 10.4 V 21.2Mining 14.0�� S 5.5 S S V V 36.9Utilities 573.2�� 547.6 25.6 S 18.5 V V 38.0

Construction 1 531.7�� 1 374.9 156.9 S 93.0 S V 18.6Manufacturing S�� S 13.4 V 13.4 V V SWholesale trade 202.4�� 136.9 65.5 S 62.5 V V 32.3Retail trade 582.4�� 440.0 142.4 S 59.6 V V 29.9Information services S�� S S V S V V S

Waste management, landscaping, or administrative/support services 178.3� S 25.9 S S S V 45.3Arts, entertainment, or recreation services 8.2�� S S V S V V 43.7Accommodation or food services S�� S 13.2 V 13.2 V V SOther services 967.4�� 966.7 S V S V V 30.0Personal transportation 12 226.1�� 12 119.2 S S V V V 4.6Not reported 433.0�� S 71.7 S 68.2 V V 47.7Not applicable2 S�� S V V V V V S

BODY TYPE

Single�unit trucks 19 042.0�� 18 485.6 S S N N N 3.8Pickup 9 316.9�� 8 814.8 S S N N N 6.6Minivan 2 375.8�� 2 375.8 V V N N N 13.9Other light vans 1 082.2�� 1 082.2 V V N N N 21.8Sport utility 4 880.2�� 4 880.2 V V N N N 8.5Armored V�� V V V N N N N

Beverage S�� S V V N N N SConcrete mixer 36.9�� 36.9 V V N N N 14.8Concrete pumper S�� S V V N N N SCrane S�� S V V N N N SCurtainside V�� V V V N N N N

Dump 73.1�� 48.8 S S N N N 20.3Flatbed, stake, or platform 156.5�� 145.7 S S N N N 12.2Low boy V�� V V V N N N NPole, logging, pulpwood, or pipe V�� V V V N N N NService, utility 56.7�� 49.9 S S N N N 25.6

Service, other 43.6�� 43.6 V V N N N 27.6Street sweeper S�� S V V N N N STank, dry bulk S�� S V V N N N STank, liquids or gases 31.2�� 20.5 S S N N N 26.7Tow/Wrecker 17.8�� 17.8 V V N N N 49.8

Trash, garbage, or recycling 26.0�� 26.0 V V N N N 21.3Vacuum S�� S V V N N N SVan, basic enclosed 837.9�� 837.6 S S N N N 4.1Van, insulated nonrefrigerated S�� S V V N N N SVan, insulated refrigerated 31.0�� 31.0 V V N N N 30.6

Van, open top S�� S S S N N N SVan, step, walk�in, or multistop 46.8�� 46.8 V V N N N 24.7Van, other S�� S V V N N N SOther V�� V V V N N N N

Truck�tractors 1 162.8�� V 1 162.8 N 1 070.0 92.7 V 4.1Automobile carrier S�� N S N S V V SBeverage 4.9�� N 4.9 N 4.9 V V 41.4Curtainside V�� N V N V V V NDump 95.1�� N 95.1 N 84.6 10.5 V 14.1Flatbed, stake, or platform 99.7�� N 99.7 N 92.8 6.8 V 15.2

Livestock S�� N S N S V V SLow boy 20.1�� N 20.1 N 20.1 V V 36.7Mobile home toter S�� N S N S V V SOpen top 8.2�� N 8.2 N 7.9 S V 46.2Pole, logging, pulpwood, or pipe V�� N V N V V V N

Tank, dry bulk 36.0�� N 36.0 N S S V 39.6Tank, liquids or gases 39.8�� N 39.8 N 39.8 V V 27.5Van, basic enclosed 720.8�� N 720.8 N 671.0 49.8 V 6.3Van, drop�frame S�� N S N S V V SVan, insulated nonrefrigerated S�� N S N S V V S

Van, insulated refrigerated 111.4�� N 111.4 N 111.4 V V 16.2Other S�� N S N S V V SNot applicable3 V�� V V N V V V N

ANNUAL MILES

Less than 5,000 377.5�� 364.9 S S 1.7 S V 14.75,000 to 9,999 2 369.2�� 2 305.5 S S 6.4 S V 9.010,000 to 19,999 9 281.4�� 9 157.2 S S 19.5 S V 5.120,000 to 29,999 3 631.2�� 3 525.7 S S 25.9 S V 13.130,000 to 49,999 1 934.8�� 1 845.0 89.8 S 74.3 5.3 V 22.7

50,000 to 74,999 955.0�� 776.0 179.1 S 169.3 7.7 V 38.075,000 or more 1 525.4�� S 1 144.4 S 773.0 77.0 V 28.8Not applicable2 S�� S V V V V V S



Table 7. Truck Miles by Truck Type: 2002�Con.[Millions. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]


Truck type

Combination

Total




trailer


trailer


trailers


trailers


total(percent)


Off�the�road 239.9�� 228.1 11.8 S S S V 38.850 miles or less 11 662.4�� 11 356.1 306.3 S 140.4 13.0 V 5.451 to 100 miles 2 603.9�� 2 456.5 147.4 S 90.6 V V 14.2101 to 200 miles 1 095.0�� 973.2 121.8 S 58.6 60.2 V 26.6201 to 500 miles 623.1�� 186.8 S S 120.2 15.7 V 44.8

501 miles or more 1 416.3�� 881.3 535.0 S 521.0 S V 25.5Not reported 2 433.9�� 2 273.3 160.6 S 128.5 V V 12.8Not applicable2 S�� S V V V V V S


Operated in Canada 9.5�� 9.5 V V V V V 46.7Operated in Mexico S�� S S V S V V SOperated within the home base state 16 283.7�� 15 311.5 972.2 S 392.4 61.4 V 4.4Operated in states other than the home base state 1 809.3�� 1 203.0 606.3 V 575.0 S V 20.5Not reported 1 857.8�� 1 717.8 140.1 S 102.1 V V 13.4Not applicable2 S�� S V V V V V S

MONTHS OPERATED

12 14 619.6�� 13 308.7 1 311.0 S 730.5 78.5 V 4.87 to 11 3 621.4�� 3 339.6 281.7 S 260.1 S V 13.82 to 6 1 727.7�� 1 607.1 120.5 S 73.8 S V 17.91 or less 105.8�� S S S S V V 49.8Vehicle not used S�� S V V V V V S

VEHICLE SIZE

Light 17 508.4�� 17 306.0 202.4 202.4 V V V 3.9Medium 1 061.7�� 771.3 S S V V V 25.9Light�heavy 254.6�� 239.2 15.4 S 8.0 V V 10.8Heavy�heavy 1 380.1�� 169.1 1 211.0 S 1 062.0 92.7 V 4.1


Less than 6,001 13 235.0�� 13 191.4 S S V V V 5.36,001 to 8,500 4 049.8�� 3 954.4 S S V V V 12.08,501 to 10,000 223.7�� 160.3 S S V V V 36.710,001 to 14,000 384.7�� 369.8 S S V V V 7.614,001 to 16,000 S�� 63.0 S S V V V S

16,001 to 19,500 341.3�� 338.5 S S V V V 7.619,501 to 26,000 254.6�� 239.2 15.4 S 8.0 V V 10.826,001 to 33,000 77.2�� 33.8 S S S V V 40.233,001 to 40,000 33.3�� 15.2 S S S V V 31.540,001 to 50,000 86.5�� 31.0 55.5 S 47.9 S V 19.6

50,001 to 60,000 77.3�� 34.1 43.2 S 39.6 S V 14.760,001 to 80,000 1 087.5�� 55.1 1 032.4 12.8 947.8 71.8 V 4.280,001 to 100,000 S�� V S V S V V S100,001 to 130,000 S�� V S V V S V S130,001 or more S�� V S V S V V S

TOTAL LENGTH (FEET)

Less than 20.0 16 007.3�� 16 007.3 V V V V V 4.420.0 to 27.9 2 011.2�� 1 955.5 S S V V V 15.528.0 to 35.9 565.5�� 447.7 S S S V V 12.736.0 to 40.9 112.5�� 56.6 55.9 S 51.3 V V 16.141.0 to 44.9 S�� 9.6 S S 33.7 V V S

45.0 to 49.9 S�� S S S 25.1 V V S50.0 to 54.9 68.3�� S 61.0 S 49.9 S V 20.855.0 to 59.9 80.1�� V 80.1 S 77.7 S V 15.560.0 to 64.9 199.8�� V 199.8 14.0 157.7 28.1 V 11.965.0 to 69.9 103.9�� V 103.9 V 97.1 S V 16.1

70.0 to 74.9 596.2�� V 596.2 V 545.1 51.1 V 7.275.0 to 79.9 24.4�� V 24.4 V 19.4 S V 31.980.0 or more S�� V S V S V V S

MILES PER GALLON

Less than 5 145.1�� 74.1 71.0 S 63.3 S V 10.65 to 6.9 541.9�� 79.3 462.6 12.8 368.4 81.4 V 7.57 to 8.9 859.6�� 352.0 507.7 S 485.2 S V 5.69 to 10.9 1 266.9�� 1 132.7 S S 19.4 V V 15.611 to 12.9 1 549.9�� 1 547.2 S S V V V 19.513 to 14.9 1 991.4�� 1 678.7 S S S S V 19.615 or more 10 709.8�� 10 640.9 S S V V V 6.1

15 to 20.9 7 772.0�� 7 703.2 S S V V V 7.621 to 24.9 2 038.2�� 2 038.2 V V V V V 17.325 or more 899.5�� 899.5 V V V V V 30.1

Not reported 3 009.8�� 2 850.4 159.4 S 121.0 S V 15.4Not applicable2 S�� S V V V V V S





Truck type

Combination

Total




trailer


trailer


trailers


trailers


total(percent)

MODEL YEAR

2003 58.6�� V 58.6 V 58.6 V V 21.42002 2 147.3�� 1 777.7 369.6 S 359.5 V V 14.62001 2 127.2�� 1 919.9 207.2 S 122.7 16.4 V 16.72000 2 897.3�� 2 778.4 119.0 S 92.4 S V 12.91999 2 007.3�� 1 655.3 S S 72.3 V V 24.9

1998 1 307.3�� 1 227.9 79.5 V 73.5 S V 18.11997 1 328.6�� 1 284.2 44.4 V 40.6 S V 21.71996 1 397.7�� 1 344.0 53.7 S 46.9 S V 20.01995 871.5�� 820.9 50.6 S 45.0 S V 22.11994 733.0�� 692.0 41.0 S 35.1 S V 21.31993 744.2�� 667.4 S S 25.3 S V 21.9Pre�1993 4 584.8�� 4 318.0 266.8 144.7 98.3 S V 10.4

VEHICLE ACQUISITION

New 10 299.4�� 9 081.5 1 217.9 S 763.8 65.1 V 6.8Used 8 422.6�� 7 955.1 467.5 167.1 276.6 23.8 V 6.8Not reported 1 482.8�� 1 449.0 33.8 S 29.7 S V 23.3


Leased 2 579.6�� 2 129.6 450.0 S 394.9 44.9 V 13.5Lessee 2 130.5�� 1 861.2 269.3 S 253.7 S V 15.4

Vehicle only 410.8�� 143.9 266.9 S 251.2 S V 8.8Vehicle with driver S�� V S V S V V SNot reported V�� V V V V V V NNot applicable4 1 717.2�� 1 717.2 V V V V V 19.0

Lessor 382.1�� S 173.4 S 133.9 35.1 V 28.5Vehicle only 226.1�� 66.4 159.8 S 120.3 35.1 V 11.5Vehicle with driver S�� S S V S V V SNot reported V�� V V V V V V NNot applicable4 S�� S V V V V V S

Not reported S�� S S V S V V SNot leased 10 766.3�� 10 054.2 712.0 S 578.0 S V 5.6Not reported 6 859.0�� 6 301.8 S S 97.2 S V 9.9

Length of leasing agreement:Leased 2 579.6�� 2 129.6 450.0 S 394.9 44.9 V 13.5

1 to 11 months 26.0�� S 18.7 V 15.6 S V 29.712 months or more 634.9�� 204.6 430.3 S 378.4 41.8 V 6.8Not reported S�� S S V S V V SNot applicable4 1 909.5�� 1 909.5 V V V V V 18.1

Provisions of lease5:Financing only 511.7�� 176.5 335.2 S 315.3 S V 7.5Full maintenance 176.2�� 53.0 123.2 V 90.2 32.9 V 13.7Payment of taxes 224.3�� 70.0 154.3 S 115.0 32.9 V 11.9Obtaining licenses and permits 207.4�� 60.6 146.7 S 109.5 32.9 V 12.5Recordkeeping 283.0�� 39.2 243.8 S 225.9 S V 10.1Fuel contract 54.4�� 21.3 33.1 V 33.1 V V 22.0

PRIMARY OPERATOR CLASSIFICATION

Private 5 358.6�� 4 660.9 697.7 S 255.8 10.1 V 12.8Motor carrier 1 058.5�� 316.8 741.8 S 662.9 75.3 V 12.5Owner operator 258.7�� S 121.7 S 100.3 S V 40.7Rental 1 172.5�� 1 121.4 51.1 V 51.1 V V 13.7Personal transportation 12 226.1�� 12 119.2 S S V V V 4.6Not applicable2 S�� S V V V V V S


Contract 678.7�� 51.7 627.0 S 577.9 35.0 V 6.7Common 253.5�� 44.9 208.6 S 160.7 S V 12.7Not reported 42.8�� 14.9 27.9 S 24.5 S V 21.5Not applicable6 19 229.9�� 18 374.2 855.7 S 306.9 10.1 V 3.8

Type of service:Truckload 782.2�� 34.4 747.8 S 700.6 29.7 V 5.6Less�than truckload 141.2�� 53.9 87.3 V 37.5 49.8 V 21.8Not reported 51.5�� 23.1 28.4 S 25.0 S V 21.3Not applicable6 19 229.9�� 18 374.2 855.7 S 306.9 10.1 V 3.8

Source of hauls:Shippers or receivers 804.0�� 73.0 731.1 S 658.7 70.8 V 6.3Brokers 62.3�� S 59.6 V 55.9 S V 21.6Centralized markets or exchanges 14.8�� S 12.6 S 7.4 S V 32.8Other V�� V V V V V V NNot reported 93.9�� 33.7 60.2 S 41.2 S V 18.6Not applicable6 19 229.9�� 18 374.2 855.7 S 306.9 10.1 V 3.8


Carrying hazardous materials 132.8�� 17.8 115.0 S 71.5 S V 20.3Not carrying hazardous materials 1 434.3�� 494.1 940.1 42.3 840.9 57.0 V 3.9Not reported 176.3�� 65.4 110.9 S 106.5 S V 12.1Not applicable8 18 461.4�� 17 908.3 S S 51.1 V V 3.9

EQUIPMENT TYPE5 9

Aerial work platform/bucket S�� S V V V V V SAir bag(s) (safety device only) 12 146.1�� 11 301.1 845.0 S 502.6 S V 6.0Air compressor (except air brakes) 150.7�� 46.4 104.2 S 101.7 S V 13.8Air�conditioning 18 672.6�� 17 020.3 1 652.3 S 1 033.3 91.8 V 4.1Air springs 949.0�� 171.5 777.5 S 731.8 S V 5.0





Truck type

Combination

Total




trailer


trailer


trailers


trailers


total(percent)


Antilock brake system 13 236.3�� 12 033.3 1 203.0 S 804.0 S V 5.6Collision warning system 14.4�� S S V S V V 42.1Computerized drive train control unit 2 908.0�� 2 785.2 S S 50.9 S V 13.6Crane 19.0�� 15.5 S V S V V 34.9Electronic vehicle identification device 83.2�� 25.4 57.7 V 57.7 V V 21.0

Engine retarder/brake 960.5�� 63.8 896.7 S 843.7 43.0 V 4.5Front�wheel drive 6 116.9�� 5 776.1 S S V V V 9.5Hoist 35.3�� 32.6 S S V V V 20.5Idle�reducing technology (portable auxiliary pack, electrification, etc.) 472.3� 8.8 463.5 S 459.9 S V 7.6Internet access 17.8�� V 17.8 V 17.8 V V 44.1

Lift gate 91.5�� 89.3 S S V V V 16.7Mounting bar for snowplow S�� S V V V V V SNavigational system 6.6�� 6.6 V V V V V 42.1Power take�off 289.4�� 139.2 150.2 17.4 132.7 V V 8.3Radial tires 14 036.8�� 12 520.5 1 516.3 S 949.2 67.5 V 5.1

Reflective material in addition to those required by law 644.8�� 85.4 559.4 S 499.1 51.5 V 7.1Road speed governor 1 404.8�� 527.0 877.9 13.5 809.3 55.1 V 3.8Toolbox 3 148.3�� 2 613.6 S S 171.4 S V 15.0Trip recorder or on�board computer with communication capabilities 1 177.2�� 627.4 549.9 V 524.5 S V 16.6Trip recorder or on�board computer without communicationcapabilities 3 257.3�� 3 167.6 89.7 S 56.0 V V 12.3

Vehicle control aids for handicapped drivers V�� V V V V V V NWheelchair lift S�� S V V V V V SWinch S�� S 7.1 V 7.1 V V S

Transmission type:Automatic 14 321.7�� 14 077.1 244.7 237.2 7.5 V V 4.8Manual 5 205.4�� 3 824.0 1 381.4 S 972.7 92.7 V 9.9Semiautomated manual S�� S S V S V V SAutomated manual S�� S S V S V V SNot reported 590.0�� 513.4 76.6 S 73.4 V V 23.8

Braking system:Hydraulic (standard) 203.8�� 175.0 28.9 S 9.5 V V 12.0Hydraulic with power assist 906.2�� 898.8 7.3 S S V V 3.8Air 1 298.3�� 195.2 1 103.2 27.9 982.5 92.7 V 3.9Other V�� V V V V V V NNot reported 141.4�� 63.6 77.8 S 74.5 V V 13.4Not applicable10 17 655.1�� 17 153.0 S S V V V 4.1


Fuel type:Gasoline 17 249.1�� 17 032.7 216.4 216.4 V V V 4.1Diesel 2 610.8�� 1 108.5 1 502.4 S 1 070.0 92.7 V 11.5Natural gas V�� V V V V V V NPropane S�� S S S V V V SAlcohol fuels V�� V V V V V V N

Electricity V�� V V V V V V NCombination 164.3�� 163.9 S S V V V 47.0Other V�� V V V V V V NNot reported V�� V V V V V V NNot applicable2 S�� S V V V V V S

Cylinders11:4 cylinders 2 582.0�� 2 579.5 S S V V V 15.06 cylinders 9 448.6�� 8 009.6 1 439.0 S 1 049.1 90.3 V 6.58 cylinders 7 901.8�� 7 644.3 257.5 249.8 S V V 8.0Other 272.4�� 252.2 20.2 S 13.2 S V 39.1

Cubic inch displacement11:Gasoline fuel 17 249.1�� 17 032.7 216.4 216.4 V V V 4.1

Less than 200 4 566.9�� 4 566.9 V V V V V 10.8200 to 299 6 388.0�� 6 388.0 V V V V V 9.7300 to 349 2 538.0�� 2 426.3 S S V V V 13.8350 to 399 2 799.2�� 2 783.7 S S V V V 14.6400 or more 753.8�� 664.6 S S V V V 23.6Not available 203.1�� 203.1 V V V V V 38.5

Diesel fuel 2 610.8�� 1 108.5 1 502.4 S 1 070.0 92.7 V 11.5Less than 400 S�� 239.9 S S V V V S400 to 599 793.8�� 754.2 39.6 S 22.7 S V 12.3600 to 799 856.8�� 76.5 780.3 S 707.0 62.4 V 5.5800 or more 340.1�� 23.2 317.0 S 288.2 23.6 V 8.1Not available 77.3�� 14.7 62.7 S 52.0 S V 16.8

Other fuel 214.5�� 214.1 S S V V V 39.4Less than 400 204.6�� 204.2 S S V V V 41.3400 or more S�� S V V V V V SNot available S�� S S S V V V S

Not reported V�� V V V V V V NNot applicable2 S�� S V V V V V S

REFUELING LOCATION

Gas station 17 406.2�� 16 820.8 585.4 S 51.0 V V 4.3Truck stop 460.8�� S 292.8 S 272.6 16.7 V 19.6Own facility (including home, farm, ranch, onsite by mobile supplier,etc.) 1 183.8�� 423.5 760.3 14.0 673.5 72.9 V 8.4

Other company’s/contractor’s facility not open to the public 398.0�� 334.5 63.4 S 56.0 S V 38.3Other V�� V V V V V V NNot reported 625.6�� 608.4 17.2 S 17.0 V V 24.3Not applicable2 S�� S V V V V V S





Truck type

Combination

Total




trailer


trailer


trailers


trailers


total(percent)

MAINTENANCE5

General maintenance performed by:None performed S�� S V V V V V SCompany�owned maintenance facility 3 463.9�� 2 449.7 1 014.2 S 829.4 68.4 V 8.9General repair business or private mechanic 9 000.2�� 8 179.6 820.7 115.8 655.6 49.3 V 6.7Dealership service department 6 189.0�� 5 365.9 823.0 S 525.9 S V 9.0Leasing company 49.5�� S 9.5 V 9.5 V V 44.5

Individual not employed/paid by any maintenance type facility 5 363.6�� 5 153.0 210.6 S 86.8 13.4 V 10.9Other V�� V V V V V V NNot reported 698.3�� 686.1 12.2 S 12.0 V V 23.4Not applicable2 S�� S V V V V V S

Extensive repairs performed by:None performed 15 200.1�� 14 083.8 1 116.4 261.4 795.2 59.8 V 4.1Company�owned maintenance facility 313.5�� 226.8 86.7 S 57.0 S V 19.2General repair business or private mechanic 1 785.4�� 1 665.1 120.2 S 100.5 S V 19.1Dealership service department 1 249.4�� 881.5 S S 70.8 S V 32.4Leasing company S�� S S V S V V S

Component distributorship (engine, transmission, body, etc.) S�� S S S S V V SIndividual not employed/paid by any repair type facility 599.0�� 570.6 28.4 S 22.4 S V 24.8Other V�� V V V V V V NNot reported S�� S V V V V V SNot applicable2 S�� S V V V V V S

AXLE ARRANGEMENT

Driving axles:1 12 951.9�� 12 571.6 380.3 202.4 94.4 83.5 V 5.52 7 251.1�� 5 912.4 1 338.7 S 975.7 S V 8.03 or more S�� S V V V V V SNot reported S�� S S S V V V S

Total liftable axles and locations12:None 2 495.2�� 1 281.4 1 213.8 54.1 1 067.0 92.7 V 2.41 10.5�� 7.4 S V S V V 38.4

Forward of the drive axle S�� S S V S V V SBelow the chassis S�� S V V V V V SBeyond the chassis S�� S V V V V V SNot reported S�� S S V S V V S

2 or more 43.8�� 43.8 V V V V V 13.9Forward of the drive axle 41.4�� 41.4 V V V V V 14.4Below the chassis S�� S V V V V V SBeyond the chassis 37.5�� 37.5 V V V V V 15.0Not reported S�� S V V V V V S

Not reported S�� V S S V V V SNot applicable10 17 655.1�� 17 153.0 S S V V V 4.1

Total liftable axles and number of braking axles:None 2 495.2�� 1 281.4 1 213.8 54.1 1 067.0 92.7 V 2.41 10.5�� 7.4 S V S V V 38.4

0 braking S�� S V V V V V S1 braking 9.6�� 6.8 S V S V V 41.4Not reported S�� V S V S V V S

2 or more 43.8�� 43.8 V V V V V 13.90 braking V�� V V V V V V N1 braking V�� V V V V V V N2 or more braking 42.9�� 42.9 V V V V V 14.1Not reported S�� S V V V V V S

Not reported S�� V S S V V V SNot applicable10 17 655.1�� 17 153.0 S S V V V 4.1

CAB TYPE

Conventional cab 1 963.3�� 1 194.8 768.5 47.4 638.2 82.9 V 2.8With sleeper 339.2�� V 339.2 V 332.7 S V 8.6Without sleeper 1 596.9�� 1 194.8 402.1 47.4 278.3 76.4 V 3.2Not reported 27.2�� V 27.2 V 27.2 V V 28.2

Cab over engine 580.7�� 132.3 448.4 S 431.9 S V 6.4With sleeper 406.3�� V 406.3 V 403.7 S V 8.5Without sleeper 158.5�� 132.3 26.2 S 12.3 S V 8.7Not reported 15.9�� V 15.9 V 15.9 V V 44.5

Cab forward of engine S�� S V V V V V SCab beside engine V�� V V V V V V NNot reported S�� S S S V V V SNot applicable10 17 655.1�� 17 153.0 S S V V V 4.1








Table 8. Truck Miles Distribution by Operational Characteristics: 2002[Millions. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]

Vehicular and operational characteristicsCoefficient of variation (percent)Truck miles

distribution forall trucks

Truck miles distributionexcluding pickups,

minivans, other light vans,and sport utilities

A B A B

Total 20 204.8�� 2 549.7 3.6 2.3

TRAILER CONFIGURATION

No trailer pulled 18 008.6�� 1 195.6 3.8 2.9Single trailer pulled 1 970.8�� 1 251.3 10.7 3.6Double trailers pulled 95.1�� 95.1 28.3 28.3Triple trailers pulled S�� S S SNot applicable1 S�� 7.7 S 33.8

RANGE OF OPERATION

Off�the�road 524.7�� 34.4 32.4 20.050 miles or less 10 567.4�� 695.7 5.3 4.351 to 100 miles 2 876.9�� 358.1 10.8 5.8101 to 200 miles 1 521.3�� 274.9 18.3 9.1201 to 500 miles 936.1�� 365.2 16.7 5.3

501 miles or more 1 214.2�� 605.8 17.6 5.5Not reported 2 433.9�� 207.8 12.8 10.9Not applicable1 S�� 7.7 S 33.8

JURISDICTION

Operated in Canada 21.5�� 10.7 40.6 32.4Operated in Mexico S�� 1.0 S 46.1Operated within the home base state 16 039.6�� 1 245.5 4.3 3.8Operated in states other than the home base state 2 089.4�� 1 070.1 11.1 4.5Not reported 1 857.8�� 214.6 13.4 11.6Not applicable1 S�� 7.7 S 33.8

OPERATOR CLASSIFICATION

Private 5 456.8�� 766.9 12.2 5.3Motor carrier 1 050.6�� 816.4 12.3 5.9Owner operator 301.5�� 158.3 36.1 16.0Rental 1 172.0�� 798.1 13.7 4.0Personal transportation 12 093.6�� 2.4 4.5 46.9Not applicable1 S�� 7.7 S 33.8


Contract 673.9�� 673.9 6.6 6.6Common 258.2�� 258.2 12.4 12.4Not reported 42.8�� 42.8 21.5 21.5Not applicable2 3 19 229.9�� 1 574.8 3.8 2.7

Type of service:Truckload 161.6�� 161.6 19.1 19.1Less�than truckload 761.9�� 761.9 5.6 5.6Not reported 51.5�� 51.5 21.3 21.3Not applicable2 3 19 229.9�� 1 574.8 3.8 2.7

PRODUCTS CARRIED4

Animals and fish, live S�� S S SAnimal feed and products of animal origin S�� 3.8 S 47.9Grains, cereal 1.6�� 1.6 47.8 47.8All other agricultural products 30.8�� 30.8 21.8 21.8Basic chemicals S�� S S S

Fertilizers and fertilizer materials 4.1�� 4.1 49.2 49.2Pharmaceutical products S�� S S SAll other chemical products and preparations S�� 8.1 S 43.8Alcoholic beverages 13.3�� 13.3 28.0 28.0Bakery and milled grain products 37.9�� 37.9 22.5 22.5

Meat, seafood, and their preparations 35.6�� 35.6 24.5 24.5Tobacco products 7.3�� 7.3 36.0 36.0All other prepared foodstuffs 53.8�� 53.8 19.0 19.0Logs and other wood in the rough S�� S S SPaper or paperboard articles S�� 11.6 S 32.1

Printed products S�� S S SPulp, newsprint, paper, and paperboard S�� S S SWood products 89.7�� 41.4 32.9 25.5Articles of base metal 371.0�� 40.4 38.1 22.0Base metal in primary or semifinished forms 19.9�� 15.9 24.8 25.2

Nonmetallic mineral products 188.0�� 73.4 43.3 22.1Tools, nonpowered 1 185.4�� 119.0 21.2 14.6Tools, powered 575.8�� 105.5 28.5 16.9Electronic and other electrical equipment S�� 37.4 S 25.2Furniture, mattresses, lamps, etc. S�� 19.1 S 33.1

Machinery 49.2�� 38.1 26.6 21.4Miscellaneous manufactured products 39.0�� 26.9 26.7 22.0Precision instruments and apparatus 16.2�� 13.1 43.5 48.3Textile, leather, and related articles 20.9�� 20.4 44.4 45.4Vehicles, including parts S�� 33.4 S 32.0

All other transportation equipment S�� S S SCoal V�� V N NCrude petroleum V�� V N NGravel or rushed stone 45.2�� 43.7 14.4 14.5Metallic ores and concentrates S�� S S S

Monumental or building stone S�� 3.4 S 40.2Natural sands 14.7�� 13.2 27.6 28.6All other nonmetallic minerals 20.8�� 20.8 36.0 36.0Fuel oils 17.0�� 15.4 25.0 25.6Gasoline and aviation turbine fuel 12.2�� 12.2 32.5 32.5



Table 8. Truck Miles Distribution by Operational Characteristics: 2002�Con.[Millions. Estimates are based on data from the 2002 Vehicle Inventory and Use Survey. Because of rounding, estimates may not be additive]

Vehicular and operational characteristicsCoefficient of variation (percent)Truck miles

distribution forall trucks

Truck miles distributionexcluding pickups,

minivans, other light vans,and sport utilities

A B A B

PRODUCTS CARRIED4�Con.

Plastics and rubber 9.5�� 9.5 33.1 33.1All other coal and refined petroleum products S�� S S SHazardous waste (EPA manifest) S�� S S SAll other waste and scrap (non�EPA manifest) 41.7�� 30.1 30.6 17.5Recyclable products S�� 7.5 S 25.5

Mail and courier parcels S�� 23.9 S 45.7Empty shipping containers 7.6�� 7.6 43.6 43.6Passengers S�� S S SMixed freight 440.7�� 440.7 8.0 8.0Products, equipment, or materials not elsewhere classified 4.6�� 4.6 33.8 33.8Products not specified 372.1�� 80.5 35.0 16.2Not applicable1 S�� 7.7 S 33.8


Division 1.1, Explosives V�� V N NDivision 1.2, Explosives V�� V N NDivision 1.3, Explosives V�� V N NDivision 1.4, Explosives .2�� .2 37.3 37.3Division 1.5, Explosives V�� V 34.9 34.9

Division 1.6, Explosives V�� V 34.9 34.9Division 2.1, Flammable gas 4.1�� 4.1 49.5 49.5Division 2.2, Nonflammable gas 1.7�� 1.7 41.4 41.4Division 2.3, Poison gas V�� V 42.9 42.9Class 3, Flammable 20.0�� 20.0 27.2 27.2

Combustible liquid 6.2�� 6.2 34.9 34.9Oxygen 2, Oxygen S�� S S SDivision 4.1, Flammable solid .5�� .5 22.7 22.7Division 4.2, Spontaneously combustible .1�� .1 45.6 45.6Division 4.3, Dangerous when wet S�� S S S

Division 5.1, Oxidizer 2.7�� 2.7 39.4 39.4Division 5.2, Organic peroxide .4�� .4 37.8 37.8Division 6.1, Poison inhalation hazard V�� V 42.9 42.9Division 6.1, Poison .4�� .4 44.9 44.9Class 7, Radioactive V�� V 42.9 42.9

Class 8, Corrosive S�� S S SClass 9 .9�� .9 37.2 37.2Hazardous materials not specified S�� S S SNot applicable1 S�� 7.7 S 33.8


1Vehicles not in use. When the respondent had partial�year ownership of the vehicle, annual miles were adjusted to reflect miles traveled when not owned by the respondent.2Column A includes: pickups, minivans, other light vans, and sport utilities; all other vehicles that are private, rental, or used for personal transportation; and vehicles not in use.3Column B includes: all other vehicles that are private, rental, used for personal transportation, or not in use.4Detail lines may not add to total because multiple products/hazardous materials may be carried at the same time.



Appendix.Approximating Unpublished Coefficients ofVariation

Estimated coefficients of variation (CVs) are presented for only the row and column totals forTables 4 through 7.

The coefficient of variation for an individual cell in a particular table can be approximated byusing the procedure below. CVs for each cell, estimated from the sample data, are available onrequest.

Tables 4 and 5

The CV (expressed as a percentage) for a cell in a particular table can be calculated as follows:

CV�C� � CV�S� *� S �STATE � C�

C �STATE � S�

where:

S = the smaller number between the row and column truck totals for the row and columncontaining the cell

C = the number of trucks in the cellSTATE = the number of trucks in the stateCV(S) = the coefficient of variation corresponding to S

Tables 6 and 7

For Tables 6 and 7, follow the above procedure but replace ‘‘trucks’’ with ‘‘truck miles.’’

Example

Suppose, in Table 4, there are an estimated 40.0 thousand trucks in the cell for retail light-sizedtrucks, for which an approximation of the CV is needed. The following information must beextracted from the table: (1) 2222.2 thousand trucks in the state, (2) 46.0 thousand trucks and anestimated CV of 27.6 percent for the ‘‘Retail Trade’’ row, and (3) 2034.0 thousand trucks and anestimated CV of 1.1 percent for the ‘‘Light-sized trucks’’ column. Since the row total of 46.0 thou-sand is less than the column total of 2034.0 thousand, use the row figure to approximate the CV:

CV (retail light-sized trucks)=

� 27.6 *� 46.0 * �2222.2 � 40.0�

40.0 * �2222.2 � 46.0�

� 29.6%

Some exceptions from this procedure will yield better approximations of the coefficients of varia-tion in particular cells. Certain rows and columns in the tables are composed predominantly of‘‘large trucks’’ (trucks excluding pickups, minivans, other light vans, and sport utilities). Becauseof the sample design, one obtains a better approximation of the coefficient of variation for a cellwhen the value of S is equal to the truck total associated with the ‘‘large trucks’’ even though thistruck (row or column) total may not be the smaller of the two truck totals. For example, if the col-umn containing the cell is composed of ‘‘large trucks,’’ then S is equal to the column total. Whenboth totals consist of ‘‘large trucks,’’ use the smaller of the row and column totals.

Columns of predominately ‘‘large trucks:’’

Tables 4 and 6—Light-heavy and Heavy-heavy

Appendix A–1Vehicle Inventory and Use Survey


Tables 5 and 7—Single-unit truck with trailer and all Truck-tractor trailer columns

Rows of predominately ‘‘large-trucks:’’

Body Type—All except pickup, minivan, other light vans, and sport utilityAnnual Miles—75,000 miles or moreVehicle Size—Light-heavy and Heavy-heavyAverage Weight—19,501 pounds or moreTotal Length—50.0 or moreMiles per Gallon—Less than 5 and 5 to 6.9Primary Operator Classification— Motor carrier, Owner operatorPrimary Operator Classification, For-hire characteristics—Type of carrier, Type of serviceHazardous Materials Carried—Carrying hazardous materialsEquipment Type—Electronic vehicle identification device, Engine retarder/brake, Navigational

system, and Reflective material in addition to those required by lawEquipment Type, Braking system—All rows except Not applicableFuel Type and Engine Size, Cubic inch displacement, Diesel fuel—600 or more and Not

availableTruck Type and Axle Arrangement, Single-unit trucks and truck-tractors without trailer—3

axles or moreTruck Type and Axle Arrangement, Combinations—All Truck-tractor rowsCab Type—All rows except Not applicable

A–2 Appendix Vehicle Inventory and Use Survey


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