supplementing census data sandag case...
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![Page 1: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/1.jpg)
Supplementing Census DataSANDAG Case Study
Supplementing Census DataSANDAG Case Study
![Page 2: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/2.jpg)
DEMOGRAPHIC DATA
![Page 3: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/3.jpg)
Dwelling Unit CountsDwelling Unit CountsCensus (SF1)Resolution: Blocks (25,700)
Property Record FilesResolution: Parcels (800,000)
Aerial PhotographsResolution: Individual buildingLimitations: Small areas only
Buildings, not units
Census (SF1)Resolution: Blocks (25,700)
Property Record FilesResolution: Parcels (800,000)
Aerial PhotographsResolution: Individual buildingLimitations: Small areas only
Buildings, not units
![Page 4: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/4.jpg)
Structure TypeStructure TypeCensus (SF3)Resolution: Block groups (2,200)Limitations: Self-reported
Property Record FilesResolution: Parcels (800,000)
Aerial PhotographsResolution: Individual buildingLimitations: Small areas only
Selected structure types
Census (SF3)Resolution: Block groups (2,200)Limitations: Self-reported
Property Record FilesResolution: Parcels (800,000)
Aerial PhotographsResolution: Individual buildingLimitations: Small areas only
Selected structure types
![Page 5: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/5.jpg)
Employment EstimatesEmployment EstimatesCensus (CTPP)Resolution: CTPP zones (500)
ES202 FilesResolution: Individual employersLimitations: Confidentiality issues
Missing employersMultiple Sites
Derived from Building Floor AreaResolution: Parcels (800,000)
Census (CTPP)Resolution: CTPP zones (500)
ES202 FilesResolution: Individual employersLimitations: Confidentiality issues
Missing employersMultiple Sites
Derived from Building Floor AreaResolution: Parcels (800,000)
![Page 6: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/6.jpg)
Household IncomeHousehold IncomeCensus (SF3)Resolution: Block groups (2,200)
State Income Tax ReturnsResolution: Tracts (600)Limitations: Confidentiality issues
Definitional differencesComplex process
Census (SF3)Resolution: Block groups (2,200)
State Income Tax ReturnsResolution: Tracts (600)Limitations: Confidentiality issues
Definitional differencesComplex process
![Page 7: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/7.jpg)
Case StudyParcel Level Dwelling Units
![Page 8: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/8.jpg)
MGRA Geography
![Page 9: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/9.jpg)
Irregular Geography
![Page 10: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/10.jpg)
Transit Access
![Page 11: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/11.jpg)
Parcel and MGRA Geography
![Page 12: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/12.jpg)
Block Group Check
![Page 13: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/13.jpg)
Block Counts and Land Use
![Page 14: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/14.jpg)
Residential Buildings
![Page 15: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/15.jpg)
Problem AreasProblem AreasCensus Structure typesGeo-coding qualityBlock definitionsSenior housing
Property Record FilesUnits on public/non-taxable land
BothUnits under construction
Census Structure typesGeo-coding qualityBlock definitionsSenior housing
Property Record FilesUnits on public/non-taxable land
BothUnits under construction
![Page 16: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/16.jpg)
TRANSPORTATION DATA
![Page 17: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/17.jpg)
Number of VehiclesNumber of VehiclesCensus (SF3)Resolution: Block groups (2,200)
Department of Motor VehiclesResolution: Countywide
Home Interview SurveysResolution: Large summary areasLimitations: Sample bias
Census (SF3)Resolution: Block groups (2,200)
Department of Motor VehiclesResolution: Countywide
Home Interview SurveysResolution: Large summary areasLimitations: Sample bias
![Page 18: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/18.jpg)
Average Trip Length (Minutes)Average Trip Length (Minutes)Census (CTPP)Resolution: CTPP zones (500)Limitations: Self-reported
Speed Surveys/Transportation ModelsResolution: TAZs (4,600)
Home Interview SurveysResolution: Large summary areasLimitations: Sample bias
Census (CTPP)Resolution: CTPP zones (500)Limitations: Self-reported
Speed Surveys/Transportation ModelsResolution: TAZs (4,600)
Home Interview SurveysResolution: Large summary areasLimitations: Sample bias
![Page 19: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/19.jpg)
Transit Mode SharesTransit Mode SharesCensus (CTPP)Resolution: CTPP zones (500)
Transit On-Board SurveysResolution: Small summary areas
Home Interview SurveysResolution: Very large summary areasLimitations: Sample bias
Census (CTPP)Resolution: CTPP zones (500)
Transit On-Board SurveysResolution: Small summary areas
Home Interview SurveysResolution: Very large summary areasLimitations: Sample bias
![Page 20: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/20.jpg)
Trip TablesTrip TablesCensus (CTPP)Resolution: CTPP zones (500)
Home Interview SurveysResolution: Very large summary areasLimitations: Sample bias
Census (CTPP)Resolution: CTPP zones (500)
Home Interview SurveysResolution: Very large summary areasLimitations: Sample bias
![Page 21: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/21.jpg)
Case StudyAuto Travel Times
![Page 22: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/22.jpg)
Travel Time SurveysTravel Time Surveys
5%245395152%12498486Total
40%8282033%93627SanYsidro-Downtown
12%32825-7%-22729Sorrento Mesa-Downtown
-2%-150516%23533Rancho Bernado-Sorrento Mesa
-5%-36265-2%-16263Oceanside-Downtown
0%0424219%53126Mid City-Sorrento Mesa
-20%-416207%11615MidCity-Kearny Mesa
5%24644-15%-84755Escondido-Kearny Mesa
8%564593%26462Escondido-Downtown
-7%-34043-10%-43539Escondido-Calsbad
20%530254%12928El Cajon-Downtown
21%6352910%33229Downtown-Sorrento Mesa
8%571660%05454Chula Vista-Sorrento Mesa
4%1272615%43026Calsbad-Escondido
DifferenceModeled ObservedDifferenceModeled Observed
PMAMRoute
![Page 23: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/23.jpg)
California Statewide Travel Survey
• 1,200 San Diego County Households• 180 Households with GPS-Equipped
Vehicles • 1,000 GPS trips out of 4,700 total survey
trips• February-October 2001• GeoStats
![Page 24: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/24.jpg)
GPS Coverage
![Page 25: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/25.jpg)
GPS PointsGPS Points
![Page 26: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/26.jpg)
Freeway Speed Comparison63.3
53.3 50.8
58.0
40.7 39.9
0
10
20
30
40
50
60
70
Off-Peak AM Peak PM PeakTime Period
Spee
d (M
PH)
GPSModel
![Page 27: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/27.jpg)
Arterial Speed Comparison26.3 26.3
23.722.7 22.1 21.6
0
5
10
15
20
25
30
Off-Peak AM Peak PM Peak
Time Period
Spee
d (M
PH)
GPSModel
![Page 28: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/28.jpg)
0
5
10
15
20
25
30
35
Minutes Miles Speed
CTPPModel
CTPP – Model Comparison
-4%
-11%
-7%
![Page 29: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/29.jpg)
Modeled Travel Times Minutes to CBD by AutoModeled Travel Times
Minutes to CBD by Auto
![Page 30: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/30.jpg)
CTPP Travel TimesMinutes to CBD by Auto
CTPP Travel TimesMinutes to CBD by Auto
![Page 31: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/31.jpg)
Modeled Travel Times Minutes to Suburb by Auto
Modeled Travel Times Minutes to Suburb by Auto
![Page 32: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/32.jpg)
CTPP Travel TimesMinutes to Suburb by Auto
CTPP Travel TimesMinutes to Suburb by Auto
![Page 33: Supplementing Census Data SANDAG Case Studydownload.ctpp.transportation.org/Future/presentations/5-12-8-McFarlane.pdfTravel Time Surveys Total 486 498 12 2% 515 539 24 5% SanYsidro-Downtown](https://reader034.vdocuments.site/reader034/viewer/2022050423/5f9233f614202e639f72de18/html5/thumbnails/33.jpg)
Supplementing Census DataSANDAG Case Study
Supplementing Census DataSANDAG Case Study