traffic weight data warehouse user...

Traffic Weight Data WarehouseTraffic Weight Data WarehouseTraffic Weight Data WarehouseTraffic Weight Data Warehouse

Alaska Department of Transportation and Public Facilities

Division of Program Development

Highway Database

3132 Channel Drive, Suite 200

Traffic Weight Data WarehouseTraffic Weight Data WarehouseTraffic Weight Data WarehouseTraffic Weight Data Warehouse

User Manual

January 29, 2009

Prepared By



Highway Database Management Section

Mary Ann Dierckman


Juneau, AK 99811-2500

In Partnership with

Wostmann & Associates, Inc.

226 Seward Street, Suite 210

Juneau, AK 99801


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1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development

Table of Contents

1 INTRODUCTION ................................................................................................................................. 4

2 WEIGH IN MOTION ........................................................................................................................... 5

2.1 ACTIVE WIM SITES ............................................................................................................................ 7

2.2 WIM PROCESS OVERVIEW ................................................................................................................ 8

2.3 ACCESSING INFORMATION ABOUT THE WIM ............................................................................... 10

3 WEIGH STATIONS ........................................................................................................................... 12

3.1.1 WEIGH STATION PROCESS OVERVIEW ............................................................................................ 13

4 ACCESSING TWDW REPORTS ..................................................................................................... 15

5 TWDW REPORTING ........................................................................................................................ 18

5.1 ADMINISTRATIVE WIM REPORTS ................................................................................................... 18

5.1.1 DATA QUALITY REPORT ................................................................................................................. 19

5.2 WIM REPORTS ................................................................................................................................. 21

5.3 WS REPORTS..................................................................................................................................... 21

6 WIM REPORTING DEFINITIONS ................................................................................................. 23

6.1 VEHICLE CLASS DEFINITIONS ......................................................................................................... 23

6.1.1 MODIFIED FHWA VEHICLE CLASS DEFINITIONS ........................................................................... 23

6.2 REPORTING STANDARDS .................................................................................................................. 27

6.2.1 ALASKA STANDARD DATA (ASD) .................................................................................................. 27

6.2.2 HEARTBEAT .................................................................................................................................... 28

6.3 LANE AND DIRECTION OF TRAVEL .................................................................................................. 29

7 WIM REPORTING OPTIONS ......................................................................................................... 31

7.1 AVAILABLE WIM REPORTS ............................................................................................................. 31

7.1.1 ALASKA STANDARD DATA (ASD) REPORT .................................................................................... 31

7.1.2 CLASS PERCENTAGES REPORT ........................................................................................................ 33

7.1.3 CLASS BY HOUR REPORT ................................................................................................................ 35

7.1.4 CLASS BY HOUR REPORT RAW DATA ............................................................................................ 37

7.1.5 ESAL (EQUIVALENT SINGLE AXLE LOADS) SUMMARY DATA FILE .............................................. 39

7.1.6 HOURLY TRAFFIC COUNTS CHART ................................................................................................. 41

7.1.7 HOURLY TRAFFIC PERCENTAGES REPORT ...................................................................................... 43

7.1.8 OVERWEIGHT DATA FILE ................................................................................................................ 45

7.1.9 RAW DATA FILE .............................................................................................................................. 47

7.1.10 RAW DATA FILE WITH AXLES ....................................................................................................... 49

8 WEIGH STATION REPORT OPTIONS ......................................................................................... 53

8.1.1 CLASS BY DAY REPORT .................................................................................................................. 53

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8.1.2 CLASS BY HOUR REPORT ................................................................................................................ 55

For more information contact Mary Ann Dierckman

Phone: (907) 465-6993

email: [email protected]

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1 Introduction

This document provides instructions for accessing traffic weight data stored in

the ITS Traffic Weight Data Warehouse. The ITS Traffic Weight Data Warehouse is

a compilation of various traffic related databases including vehicle weight

within the Department of Transportation and Public Facilities (DOT&PF).

Currently, the data warehouse contains information from Weigh-In-Motion (WIM)

and Weigh Station (WS) sites.

The data warehouse is part of the DOT & PF’s internal web-based Highway Data

Port (HDP) located at http://dataport.dot.state.ak.us/. The Highway Data Port

provides report generation of data contained in various data warehouses (such

as Highway Analysis System, Accident Data, and Weigh-In-Motion) based on

user-defined queries. In order to access the Highway Data Port, the user must

have access to the State’s network via a direct connection or via the Virtual

Private Network (VPN).

For the ITS Traffic Weight Data Warehouse information, HDP allows access to two

areas of information, which are discussed in the section with the same name:

• Weigh-in-Motion -- provides the Truck Weight Monitoring portion of the

State's Traffic Monitoring System for Highways using WIM technology.

• Weigh station -- provides scale information for truck weight information

used by the State’s Traffic Monitoring System for Highways using fixed

scales

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2 Weigh In Motion

The Weigh-in-Motion (WIM) program provides the Truck Weight Monitoring

portion of the State's Traffic Monitoring System for Highways. Of all the traffic

monitoring activities, WIM requires the most sophisticated data collection

sensors; the most controlled operating environment (strong, smooth, and level

pavement in good condition), and the most costly equipment to set-up and

calibrate.

WIM systems are designed to measure the vertical forces applied by the truck

axles to sensors in the roadway, thereby providing an estimate of the axle

weights. A WIM Station provides the following data:

• vehicle gross weight

• vehicle weight by axle

• vehicle speed by lane and direction

• vehicle length

• time stamp

• if vehicle is overweight by vehicle classification or axle

• location by lane and direction

• vehicle volume

• vehicle classification

• vehicle speed

WIM data provides information for the following:

• For secondary weight enforcement by the DOT&PF Division of

Measurement Standards & Commercial Vehicle Enforcement (MS&CVE)

• To calculate Equivalent Single Axle Load (ESAL) for pavement and bridge

design

• To calculate Average Annual Daily Traffic (AADT) volumes and generate

vehicle classification reports

• To meet federal reporting requirements

• To report gross vehicle weight by lane and direction

• To report vehicle classification by lane and direction

• To report vehicle count by lane and direction

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• To upload data into the State’s Traffic Monitoring System (TMS)/Highway

and the Highway Accident System Traffic Data System (TDS)

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2.1 Active WIM Sites

The following sites are operational as of the publication of this document.

Region WIM Site HDP Description Highway Milepoint CDS Route

Number

Data

From

Data To

Central Glenn (GLH) Glenn Hwy northbound lane, approx .5

miles south of NB Scalehouse entrance.

Glenn Weigh Station north of

Anchorage (Milepoint 8.547)

135000 9/7/2005 10/9/2006*

Central GNC Glenn Hwy northbound lane, approx .5

miles south of NB Scalehouse entrance.



135000 1/1/2008 Current

Central GSC Glenn Hwy southbound lane, approx .5

miles north of SB Scalehouse entrance.



135000 1/1/2008 Current

Central Tudor (TDS) Tudor Road between Patterson St. and

Kingston Rd.

Strategic Highway Research

Program site in Anchorage

(Milepoint 5.640)

133899 9/30/2003 Current

Central Port of

Anchorage

(POA)

Ocean Dock Road between RR Tracks

and Bluff Rd.

Ocean Dock Road (Milepoint

0.350)

134344 1/1/2003 Current

Central Seward (NSH) New Seward Hwy between 76th Ave.

and Dimond Blvd.

New Seward Highway at 76th

Ave in Anchorage (Milepoint

121.479)

130000 7/28/2003 Current

Central Minnesota (MIN) Minnesota Drive between Strawberry

Rd. and Dimond Blvd Exits.

North of Dimond Blvd in


134300 12/31/2002 Current

Northern Tok (TOK) Alaska Hwy at Milepost 1310 or 0.6 miles

west of Tok River crossing

Alaska Highway at Mile point

1310 (Milepoint 85.851)

180000 9/7/2005 Current

Northern Steese (FOX) Steese Hwy between Goldstream Rd. &

Elliot Hwy.

Steese Highway at Steese

Trailings (Between Milepoint

9.581 – 11.094)

152000 8/29/2005 Current

Central Test

Site

Parks (CHU) Parks Highway @ Chulitna Chulitna Test Site at Milepost

118 (Milepoint 82.98)

170000 N/A N/A

*Data from 10/10/2006 to current have not been loaded to the State’s FTP site.

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2.2 WIM Process Overview

WIM data are collected in a proprietary format using International Road

Dynamics (IRD) equipment, and then are loaded into the ITS Traffic Weight Data

Warehouse. The data are collected at each site as a vehicle passes over the

WIM site. The data are stored at the site until automatically pulled from the site.

The data are then transferred using the Juneau FTP (File Transfer Protocol) server

to the Site Processing server for archiving in a data warehouse. The information

can be accessed through the Highway Data Port, where you can generate

charts and reports for each site (see Figure 1).

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Figure - 1 - WIM Data Flow Process

Polling Server

WIM Site

WIM Site

WIM Site

Procomm Plus

using Autopoll

script

WIM RAW

DATA

Site Processing

Server

Servers

Oracle DB

ASCII

DATA

storage

Servers

LaptopsWorkstations

Mainframe

HDMS

Data

Interface

User Defined

Process

Using equipment installed in road, information

such as height, weight, width, # of axles, weight

distribution, and speed are collected and stored

in a proprietary format.

The information collected can be

reviewed for historical and on the side

of the road analysis. Where traffic

information is used for enforcement,

access to information can be obtained

via direct connection or network.

Daily collects all WIM

information from all

sites for previous

day.

Stores the centrally

collected information

via FTP.

Processes the centrally

collected information to

determine weight, ESAL,

vehicle class, and speed

for classification and

counts. Data quality is

also determined.

A Data Warehouse

for statewide

information has been

created and the

information is

indexed and stored

for all reporting with

in the State and

FHWA.

Alaska

Standard

Data Format

ChartsASCII Data

FHWA

HAS

Web Interface to Data

Warehouse provides

authorized users access to

the data and the ability to

create reports based on raw

traffic data and personal

selection criteria.

Paul Marrero - WAI

Updated: July 18, 2008

For the Alaska DOT & PF

WIM DATA Flow Process

From Site to Data Warehouse To Users

Standard Class and

weigh tables are

loaded into every site

to insure consistency.

META Data provides

additional details on

data and summary

tables to do

preprocessing for

reports.

Collection Archival Data Retrieval

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2.3 Accessing Information About The WIM

1. Log onto the DOT&PF network by using your SOA enterprise (email) user

name and password to log into either a DOT&PF workstation or the VPN.

2. Start a web browser.

Enter http://dataport.state.ak.us in the web address field.

The following screen appears.

On the left side of the screen, in the blue area, under Information About,

select Weigh-In-Motion.

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The Weigh-In-Motion Program information page appears.

3. Select the Weigh-In-Motion.

The following screen appears.

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3 Weigh Stations

The Weigh Station (WS) is another portion of the State’s Traffic Monitoring System

for Highways. Weigh stations are equipped with scales, some of which permit

the trucks to continue moving while being weighed, while older scales require

the trucks to stop. DOT&PF employs various scale types from single axle scales to

multi-axle sets, depending on the configuration of the weigh station. Signal lights

indicate if the driver should pull over for additional inspection or if the driver can

return to the highway. Each weigh station gathers specific information for every

vehicle that passes through. Currently, the following Weigh Stations are in

Alaska:

Weigh

Station

HDP Description Highway Milepoint CDS Route

Number

Ester Ester Ester Weigh Station at Parks

Highway (Milepoint 313.61)

170000

Fox Fox Hwy scale lane,

approx .5 miles

Fox Weigh Station at Steese


152000

Glenn

Inbound

Glenn Inbound Glenn IB Weigh Station at

Glenn Highway (Milepoint

9.50)

135000

Glenn

Outbound

Glenn Outbound Glenn OB Weigh Station at

Glenn Highway (Milepoint

9.50)

135000

Potter Potter Potter Weigh Station at

Seward Highway (Milepoint

13.70)

130000

Sterling Sterling Sterling Weigh Station at

Sterling Highway (Milepoint

46.34)

110000

Tok Scale lane for Tok site Tok Weigh Station at Alaska


230000

Valdez Valdez

This is NOT an

operating WS...scales

are broken.

Valdez Weigh Station at

Richardson Highway

(Milepoint 3.00)

188000

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A Weigh Station provides the following data:

• vehicle weight by axle

• gross vehicle weight

• vehicle classification

• vehicle length

Weigh Station data is used:

• For weight enforcement by the DOT&PF Division of Measurement

Standards & Commercial Vehicle Enforcement (MS&CVE)

• To calculate Equivalent Axle Load (EAL) for pavement and bridge

design

• To meet federal reporting requirements

• To meet state permitting requirements

3.1.1 Weigh Station Process Overview

At each site, DOT&PF collects data as a vehicle is weighed on the scale. The

scale operator enters data for each vehicle. The data is stored at the site until it

is collected for file transfer.

The data file is transferred from the Juneau FTP (File Transfer Protocol) server to

the Site processing server for archival in a data warehouse.

The information can be accessed through the Highway Data Port, where you

can generate charts and reports for each site (see Figure 2).

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Site Processing

Server

Servers

Oracle DB

ASCII DATA

storage

Servers

LaptopsWorkstations

Alaska state-wide

Highway Data

Management

Systems Data

Interface

Stores the centrally

collected information

via FTP.

A Data Warehouse for

statewide information has

been created and the

information is indexed and

stored for all reporting with

in the State and MSCVE.

Alaska

Standard

Data Format

ChartsASCII Data

MSCVE

Web Interface to Data

Warehouse provides

authorized users access to

the data and the ability to

create reports based on raw

traffic data and personal

selection criteria.

Paul Marrero - WAI

Updated: November 29, 2006

Created: October 23, 2003

For the Alaska DOT & PF

Weigh Station DATA Flow Process

From Site to Data Warehouse To

Users

META Data provides

additional details on data and

summary tables to do

preprocessing for reports.

Collection Archival Data Retrieval

Polling Server

WS local

RDBMS

(MS Access)

Daily collects all weigh information

from all sites for current day.

WS site server

Using equipment installed in Weigh

Station scales, information such as

weight, # of axles, weight distribution,

are collected and stored in a

proprietary format.

Processes the centrally collected

information to determine weight,

vehicle class, for classification

and storing.

Figure - 2 – Weigh Station Data Flow Process

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4 Accessing TWDW Reports

1. Log onto the DOT&PF network using your LDAP enterprise (email) user

name and password to log into either a DOT&PF workstation or the VPN.

2. Start a web browser.

3. Enter http://dataport.dot.state.ak.us in the web address field.

The following site appears.

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4. Scroll to the bottom until you see the following options.

The above options access the Traffic Weight Data Warehouse.

• Site

Maintenance

This option requires additional permission from

the Planning section. This option allows the

maintenance of site information, such as

vendors, site names, and sensors. Information on

this option is in the TWDW Operations Manual.

• TWDW

Reporting

This option allows you to create reports on WIM

and Weigh Station sites that allow assessment of

the weight and class of vehicles that passed the

site, the direction of travel, and the time.

5. Select TWDW Reporting.

The following screen appears:

6. Enter your LDAP email username and password.

Now you have access to the Reports screen shown here.

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The reports are listed under the Select Category dropdown list.

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5 TWDW Reporting

TWDW Reporting provides three selections from the Category dropdown list.

5.1 Administrative WIM Reports

This option allows you to generate reports using WIM data and is available to

users with administrative privileges to the Traffic Weight Data Warehouse.

Complete the steps in Section 4 to access this option.

1. From the Category dropdown list, select Administrative WIM Reports.

The left side of the screen populates with a list of reports.

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2. Select the report from the list.

Currently the only available administrative report is the Data Quality

Report discussed in section 5.1.1.

3. Enter the required data.

4. Select the Generate Report button to see the report or the Clear button

to remove your selections.

5.1.1 Data Quality Report

The Data Quality Report is used to assess the quality of the data being provided

by the site. The report provides information on failure of site detection, missing

heartbeats, no data, when the acceptable error rate that was entered is

exceeded, and good lane per day.

Report Type WIM Site Date Range

Acceptable Error Rate Comments

Data Quality Report POA

7/1/2008- 7/15/2008

15

Provided on the next page is an example of the PDF file.

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5.2 WIM Reports

This option allows you to generate reports using WIM data. Complete the steps

in Section 4 to access this option.

1. From the Category dropdown list, select WIM Reports.



For information about the reports, see section 7. WIM Reporting Options.




5.3 WS Reports

This option allows you to generate reports using Weigh Station data. Complete

the steps in Section 4 to access this option.

1. From the Category dropdown list, select WS Reports.


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For information about the reports, see section 8. WS Reporting Options.




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6 WIM Reporting Definitions

6.1 Vehicle Class Definitions

The Federal Highway Administration (FHWA) sets the standards for vehicle

classification. Several vehicle classification methods exist for monitoring vehicles

on the roads. Alaska Department of Transportation and Public Facilities

(DOT&PF) uses a modified version of the FHWA 13-category scheme.

6.1.1 Modified FHWA Vehicle Class Definitions

The class definitions provided below are the 13 original FHWA classifications

provided plus two specific Alaska classifications (that is, classes 15 and 16). Also,

a Class Zero is used by International Road Dynamics (IRD) to classify WIM field

errors and these error counts are excluded from all counts and classifications.

1 MOTORCYCLES (Optional) – All two- or three-wheeled motorized

vehicles. This category includes motorcycles, motor scooters,

mopeds, motor-powered bicycles, and three-wheel motorcycles.

2 PASSENGER CARS – All sedans, coupes, and station wagons

manufactured primarily for the purpose of carrying passengers.

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3 OTHER TWO-AXLE, FOUR-TIRE SINGLE UNIT VEHICLES – All two-axle,

four tire, vehicles, other than passenger cars.

Note: automatic vehicle classifiers have difficulty distinguishing class 3

from class 2.

4 BUSES – All vehicles manufactured as traditional passenger-carrying

buses with two axles and six tires or three or more axles. This category

includes only traditional buses (including school buses) functioning as

passenger-carrying vehicles.

5 TWO-AXLE, SIX-TIRE, SINGLE UNIT TRUCKS – All vehicles on a single

frame including those with two axles and dual rear wheels.

6 THREE-AXLE SINGLE UNIT TRUCKS – All vehicles on a single frame

having three axles.

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7 FOUR OR MORE AXLE SINGLE UNIT TRUCKS – All trucks on a single

frame with four or more axles.

8 FOUR OR LESS AXLE SINGLE TRAILER TRUCKS – All vehicles with four or

less axles consisting not two units, one of which is a tractor or straight

truck power unit.

9 FIVE-AXLE SINGLE TRAILER TRUCKS – All five-axle vehicles consisting of

two units, one of which is a tractor or straight truck power unit.

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10 SIX OR MORE AXLE SINGLE TRAILER TRUCKS -- All six or more axle

vehicles consisting of two units, one of which is a tractor or straight

truck power unit.

11 FIVE OR LESS AXLE MULTI-TRAILER TRUCKS – All vehicles with five or

less axles consisting of three or more units, one of which is a tractor or

straight truck power unit.

12 SIX-AXLE MULTI-TRAILER TRUCKS – All six-axle vehicles consisting of

three or more units, one of which is a tractor or straight truck power

unit.

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13 SEVEN OR MORE AXLE MULTI-TRAILER TRUCKS – All vehicles with

seven or more axles consisting of three or more units, one of which is a

tractor or straight truck power unit.

14 These are unclassified vehicles because the description of the

vehicle did not meet any classification criteria within the IRD vehicle

classification table.

15 CARS/PICKUP TRUCKS WITH TRAILERS1 -- These are passenger

vehicles pulling recreational or other light trailers.

16 RECREATIONAL VEHICLES1 - These are camping and recreational

vehicles, motor homes, etc., having two or three axles and dual rear

wheels.

6.2 Reporting Standards

6.2.1 Alaska Standard Data (ASD)

The Alaska Standard Data Format2 document contains detailed information

about the standard. ASD data is loaded into the HAS database using the ASD

1 These are being specifically tracked to obtain a count of how many inbounds and outbounds

are crossing the sites. These are specific to Alaska

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load process detailed in the ASD Load Instructions document provided on the

web at http://dataport.state.ak.us. All data fields in the ASD Format

configuration are designed to achieve maximum compatibility with the data

formats defined in Federal Highway Administration’s (FHWA) 2001 Traffic

Monitoring Guide (TMG). The chart below, copied from the ASD Format

Document, provides the layout for the ASD format.

6.2.2 HeartBeat

All WIM stations with the exception of Glenn Hwy record a signal every 15

minutes to log the state of the WIM station. The heartbeat (HBT) signal is typically

logged at :03, :18, :33 and :48 of every hour to provide the state of the

equipment (up/down).

HBT is stored in a database table that collects the signals from the WIM IRD

hardware. These signals indicate the status (or heartbeat) of the equipment. The

WIM_HBTDATA records the condition of electronic equipment at every moment

of data collection and stores it in the <WIM_site>.hbt file.

2 Alaska Department of Transportation, Division of Program Development.

January 29, 1999.

Figure 4c. Classification Data Formats

Field Alpha/

Data Record Column†

Field Name Length Numeric Description

Header (line1) 1-6 *BEGIN 6 A Begin Flag

8-9 CC 2 A Configuration Number

11-12 FF 2 A File Number

14-21 SSSSSSSS 8 A Station ID

23-26 IIII 4 A Record Interval

28 U 1 A Measurement Unit

30-31 PP 2 A Equipment Type

33-34 MM 2 A Equipment Maker

36-51 XXXXXXXXXXXXXXXX 16 A Equipment Serial Number

Header (line2) 1-6 *CLASS 6 A Classification Data Label

29-30 CL01 2 A Column Heading for Class Count, Class 1
















107-111 TOTAL 5 A Column Heading for Total Class Count, All Categories

† Column numbers not included in this list indicate space(s).

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To collect this information, a script is used to open the <WIM_site>.hbt file,

convert it to ASCII standard format, and upload the data to the WIM_HBTDATA

table. As part of WIM database, the heartbeat data provides additional

information when collecting and analyzing exception situations, which occur

when WIM electronic equipment does not operate correctly.

By using the heartbeat information available in the WIM data warehouse, users

can separate electronic equipment problems from low traffic issues to exclude

electronic equipment problems.

The following matrix defines how the heartbeat data is included in the Alaska

Standard Data (ASD) report. For example, if the Heartbeat Record Status is

Negative, but the Traffic Records are positive, then the information is not

included in either the ASD Full or the ASD Partial Reports.

Heartbeat

Records Status Positive Negative Negative Missing Missing Positive

Traffic Records Positive Positive Missing Positive Missing Missing

Include Day in

ASD Full

Yes No No Yes No Yes

Include Hour in

ASD Partial

Yes No No Yes No Yes

In addition to the state of the equipment, the entire station may be down and

no message is logged. If a station is down or no heartbeat is recorded, the data

is excluded from the ASD report.

6.3 Lane and Direction of Travel

A lane number and direction of travel is assigned to each truck record. Each

lane is numbered beginning with 1 for the right-hand side of the road for each

direction of travel. Direction of travel in WIM indicates which way the vehicles

are travelling along the lane (North, South, East or West).

(NOTE: ASTM Designation E 1318-02 Standard Specification for Highway Weigh-

In-Motion (WIM) Systems with User Requirements and Test Methods [Soon to be E

1318-09] addresses lane numbering at a WIM site, and the reference to the TMG.

5.4 Lane and Direction Code—A lane and direction-of-travel code for each

vehicle processed by Type I, Type II, and Type III WIM systems shall consist of a

number beginning with 1 for the right-hand northbound or eastbound traffic

lane and continuing until all the lanes in that direction of travel have been

numbered; the next sequential number shall be assigned to the lanes in the

opposite direction of travel beginning with the left -hand lane and continuing

until all lanes have been numbered. Provision shall be made for 12 numbers in

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the code. This code may be used to incorporate information required for FHWA

Truck Weight Data Collection3.)

3 Traffic Monitoring Guide, Third Fourth Edition, February 19952001, U.S. Department of Transportation, Federal Highway Administration, Office of Highway Information Management, Washington, DC 20590.

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7 WIM Reporting Options

7.1 Available WIM Reports

The following sections provide images of the available reports and their data

definitions. The following reports are currently available:

7.1.1. ASD Report

7.1.2. Class Percentages Report

7.1.3. Class by Hour Report

7.1.4. Class by Hour Report Raw Data

7.1.5. ESAL Summary Data File

7.1.6. Hourly Traffic Counts Chart

7.1.7. Hourly Traffic Percentages Report

7.1.8. Overweight Data File

7.1.9. Raw Data File

7.1.10. Raw Data File with Axles

7.1.11. Data Quality Report

7.1.1 Alaska Standard Data (ASD) Report

Three types of ASD Reports are available:

• ASD Full -- excludes bad heartbeat records.

• ASD Full Allowing Bad Heartbeat Record -- includes bad heartbeat

records (no more than one missing Heartbeat and/or no more than

one system status message per day).

• ASD Partial -- includes days with bad hours, but the report excludes

hours with bad heartbeat events. The missing hour(s) that is/are

excluded from the report is/are replaced by a new ASD footer/header,

breaking the day up in separate ASD blocks.

The following data was used to generate the example reports provided below.

Report Type WIM Site Date Range Comments ASD Report Type

ASD Report POA 8/1/2007 One full day of data ASD Full

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A data entry is defined as a set of data records that is complete with a header, a data block, and a trailer. In

data entry, each line is considered a data record. The header and trailer are the records whose first column is

an asterisk (*); they contain the general information about the data type, the station, the equipment, and the

data categories used in the configuration. The other lines make up the data block, which contains traffic

counts. The ASD format displays volume data by vehicle class and hour of each full 24-hour day.

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7.1.2 Class Percentages Report

The Class Percentages report provides the distribution of traffic as a percent by

class. The following data was used to generate the example report provided

below.

Report Type Date Range WIM Site Lane Hours Days of the Week Vehicle Classes

Class Percentages 8/1/2007 POA 1, 2 0000-2300 All

All

Provided on the next page is an example of the Adobe PDF version of the file.

Class By Hour Raw Data Lane_Number Lane the vehicle was in at the time of observation

vehicleClass Class of vehicle

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7.1.3 Class By Hour Report

The Class By Hour report provides the distribution of traffic by class and hour. The

report displays hourly counts for a site by class, site, hour and lane. The following

data was used to generate the example report provided below.

Report Type Date Range WIM Site Lane Hours

Days of the Week

Vehicle Classes

Class by Hour Report 8/1/2007 POA 1, 2 0000-0700 All

All

Provided on the next page is an example of the Adobe PDF version of the file.

Class By Hour Data

tdate Date of the observation ttime Time of the observation Lane_Number Lane the vehicle was in at the time of observation


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7.1.4 Class By Hour Report Raw Data

The Class By Hour report provides the distribution of traffic by class with minimal

formatting. The report displays hourly counts for a site by class, site, hour and

lane. The following data was used to generate the example report provided

below.

Report Type Date Range WIM Site Lane Hours Days of the Week Vehicle Classes

Class By Hour Report Raw Data 8/1/2007 POA 1, 2 0000-0700 All

All

Provided below is an example of the MS Excel version of the file.

Class By Hour Raw Data

tdate Date of the observation ttime Time of the observation Lane_Number Lane the vehicle was in at the time of observation


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7.1.5 ESAL (Equivalent Single Axle Loads) Summary Data File

This report gives an hourly sum and average of ESALs (Equivalent Single Axle

Loads) for each vehicle class. This report can be used to determine the impact

of this vehicle’s weight to the roadway.

The following data was used to generate the example reports provided below.

Report Type WIM Site Date Range Comments

ESAL Summary Data File POA 8/1/2007 One full day of data

On the next page is an example of the report in Ms Excel format.

ESAL Summary Data File Site Code Name of the location

Lane_Number Lane the vehicle was in at the time of observation

Time_Key Date and time of the observation

Day_OF_Week Day of the week in numerical format

HOUR_OF_DAY Hour of the observation, between 0 and 23

VEH_CLASS Class of the vehicle

ERR_FLAG The error flag number

GVW_OW Gross weight in kips of vehicle (kips = 1000 lbs) for Overweight Vehicles

min_esal Minimum ESAL measured

avg_esal Average ESAL measured

max_esal Maximum ESAL measured

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7.1.6 Hourly Traffic Counts Chart

This report gives vehicle counts for each class for each hour of the day,

including total class counts, total class percentages, and daily class counts.

The following data was used to generate the example report provided below.

Report Type WIM Site Hours Date Range Days of the Week Comments

Hourly Traffic Counts Chart POA

0000-2300 7/1/2007 to 7/31/2007 All

One full month of data

On the next page is an image of the PDF file that is generated.

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7.1.7 Hourly Traffic Percentages Report

This report gives total vehicle counts for each hour of the day, including hour

totals, hour percentages, and daily totals. Traffic volume for this report does not

include class; however, it does give the grand total of all vehicles.

The following data was used to generate the example report provided below.

Report Type WIM Site Hours Date Range Days of the Week Comments

Hourly Traffic Percentages Chart POA

0000-2300 7/1/2007 to 7/31/2007 All

One full month of data

On the next page is an example of the report in PDF format.

1/29/2009 Traffic Weight Data Warehouse User ManualTraffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development

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7.1.8 Overweight Data File

This report gives, for each class, the total vehicle count, number of valid

vehicles, number of violation vehicles, and percentage of violations. Violations

can occur from single axle, tandem axle, gross vehicle weight, or bridge

regulations for each hour of a day. The following data was used to generate the

example reports provided below.

Report Type WIM Site Date Range Comments

Overweight Data File POA

8/1/2007 to 8/2/2007 Two full days of data

On the next page is an example of the same file in a MS Excel format.

Overweight Data File Site Code Name of the location

Lane_Number Lane the vehicle was in at the time of observation

Time_Key Date and time of the observation

Day_OF_Week Day of the week in numerical format

HOUR_OF_DAY Hour of the observation, between 0 and 23

VEH_CLASS Class of the vehicle

ERR_FLAG The error flag number

GVW_OW Gross weight in kips of vehicle (kips = 1000 lbs) for Overweight Vehicles

VEH_CNT The total count of the vehicles

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7.1.9 Raw Data File

The raw report provides a listing of each vehicle record, with minimal formatting.

Each vehicle record is a string of numbers separated by commas. The following

data was used to generate the example reports provided below.

In newer versions of MS Excel, the ID column may come in as a scientific

number. Simply right click on the column and select Format Cells, then choose

number and zero decimal places. These steps will change the auto-format of

scientific number back to a numeric field so you can see the ID number.


Comments

Raw Data File POA 8/1/2007 The full day of data will not fit on one page

Provided on the next page is an example of the MS Excel version of the file.

Raw Data

id Observation number in the WIM or Weigh Station site location Name of the location tdate Date of the observation ttime Time of the observation weekday Day of the week in numerical format year The last digit of the year month Month in numerical format day Day of the observation hour Hour of the observation, between 0 and 23 minute Minute of the observation second Second of the observation tenths Tenth of a second of the observation errorFlag Code signifying an error (0 - no error, 1 - 10 - fatal errors, 11-19 -

general errors, 20-27 - soft errors, 28 - overweight) recordType Number to indicate how the vehicle information was stored. If 11 it

contains traffic and WIM information. 10 - traffic count only lane Lane the vehicle was in at the time of observation speed Calculated speed of the vehicle at the time of observation vehicleClass Class of vehicle length Calculated length in feet of the vehicle, bumper-to-bumper gvw Gross weight in kips of vehicle (kips = 1000 lbs) esal Number of equivalent single axle loads (18,000 lb unit) aviTag Automatic Vehicle Identification tag temp Road temperature at the time of weighing (if sensors are installed) gvw_ow Gross weight in kips of vehicle (kips = 1000 lbs) for Overweight

Vehicles

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7.1.10 Raw Data File with Axles

The raw report provides a listing of each vehicle record, with minimal formatting.

Each vehicle record is a string of numbers separated by commas. The following

data was used to generate the example reports provided below.

NOTE: As this report is very large and uses a lot of web server memory to run, use

a date range of 1 week or less to avoid overloading the system.

In newer versions of MS Excel, the ID column may come in as a scientific

number. Simply right click on the column and select format, then chose number

and zero decimal places. These steps will change the auto-format of scientific

number back to a numeric field so you can see the ID number.


Comments

Raw Data File with Axles POA 8/1/2007

The full day of data will not fit on one page

Provided on the next page is an example of the MS Excel version of the file.

Raw Data File with Axles

id Observation number in the WIM or Weigh Station site location Name of the location tdate Date of the observation ttime Time of the observation weekday Day of the week in numerical format year The last digit of the year month Month in numerical format day Day of the observation hour Hour of the observation, between 0 and 23 minute Minute of the observation second Second of the observation errorFlag Code signifying an error (0 - no error, 1 - 10 - fatal errors, 11-19 -

general errors, 20-27 - soft errors, 28 - overweight) recordType Number to indicate how the vehicle information was stored. If 11 it

contains traffic and WIM information. 10 - traffic count only lane Lane the vehicle was in at the time of observation speed Calculated speed of the vehicle at the time of observation vehicleClass Class of vehicle length Calculated length in feet of the vehicle, bumper-to-bumper gvw Gross weight in kips of vehicle (kips = 1000 lbs) esal Number of equivalent single axle loads (18,000 lb unit) weightAxle1 Weight in kips of axle 1 (steering) axle12 Length in feet between axles 1 and 2 weightAxle2 Weight in kips of axle 2 (usually drive axle) axle23 Length in feet between axles 2 and 3 weightAxle3 Weight in kips of axle 3 axle34 Length in feet between axles 3 and 4

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weightAxle4 Weight in kips of axle 4 axle45 Length in feet between axles 4 and 5 weightAxle5 Weight in kips of axle 5 axle56 Length in feet between axles 5 and 6 weightAxle6 Weight in kips of axle 6 axle67 Length in feet between axles 6 and 7 weightAxle7 Weight in kips of axle 7 axle78 Length in feet between axles 7 and 8 weightAxle8 Weight in kips of axle 8 axle89 Length in feet between axles 8 and 9 weightAxle9 Weight in kips of axle 9 axle910 Length in feet between axles 9 and 10 weightAxle10 Weight in kips of axle 10 axle1011 Length in feet between axles 10 and 11 weightAxle11 Weight in kips of axle 11 axle1112 Length in feet between axles 11 and 12 weightAxle12 Weight in kips of axle 12 axle1213 Length in feet between axles 12 and 13 weightAxle13 Weight in kips of axle 13 axle1314 Length in feet between axles 13 and 14 weightAxle14 Weight in kips of axle 14 aviTag Automatic Vehicle Identification tag temp Road temperature at the time of weighing (if sensors are installed) gvw_ow Gross weight in kips of vehicle (kips = 1000 lbs) for overweight

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8 Weigh Station Report Options

These reports and definitions are currently available for Weigh Stations.

8.1.1 Class by Day Report

The Class By Day report provides the distribution of traffic by class and day. The

report displays daily counts for a site by class, site, and lane. The following data

was used to generate the example report provided below.

Report Type Date Range Site Days of the Week

Vehicle Classes Comments

Class by Day Report

7/1/2008-7/31/2008 GOB All

All A month of data

Class By Hour Data

tdate Date of the observation ttime Time of the observation Lane_Number Lane the vehicle was in at the time of observation vehicleClass Class of vehicle

Below is an example of the report in PDF format.

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8.1.2 Class by Hour Report

The Class By Hour report provides the distribution of traffic by class and hour. The

report displays hourly counts for a site by class, site, and lane. The following data

was used to generate the example report provided below.

Report Type Date Range Site Hours Days of the Week

Vehicle Classes Comments

Class by Hour Report

7/1/2008-7/15/2008 GOB All All All

A half month of data

Class By Hour Data

tdate Date of the observation ttime Time of the observation Lane_Number Lane the vehicle was in at the time of observation vehicleClass Class of vehicle

Below is an example of the report in PDF format.

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Highway Database


Email: [email protected]



Highway Database Management Section

Mary Ann Dierckman


Juneau, AK 99811-2500

Phone: (907) 465-6993

Email: [email protected]

In Partnership with

Wostmann & Associates, Inc.

226 Seward Street, Suite 210

Juneau, AK 99801


traffic weight data warehouse user...

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