CTPP Overview

Census Transportation Planning Products

program

Offers a set of Data Tables designed and

paid for by transportation planners

for transportation planners

What is the CTPP?

An AASHTO sponsored data program funded by member state transportation agencies

Operates with support from FHWA, RITA, FTA, Census Bureau, MPOs and TRB

The program includes:Data productsTraining and technical assistanceResearch

Designed for the transportation community

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StatesLaine Heltebridle, PA (Region I)

Greg Slater, MD (Region I)Regina Colson, FL (Region II)

Juyin Chen, VA (Region II) Phillip Mescher, IA (Region III)

Cory Pope, UT (Region IV) Erik Sabina, CO (Region IV)

MPOsShimon Israel, MTC

Brian Lasagna, BCAGMell Henderson, MARCArash Mirzaei, NCTCOG

Guy Rousseau, ARCClara Reschovsky, MWCOG

Tom Faella, LAPCMaryAnn Waldinger, COMPASS

Ex Officio MembersKen Cervenka, FTA

Ed Christopher, FHWARich Denbow, AMPO

Alison Fields, Census BureauMatt Hardy, AASHTO

Jonette Kreideweis, ConsultantLi Leung, BTS

Brian McKenzie, Census BureauElaine Murakami, FHWAJanet Oakley, AASHTO

Alan Pisarski, ConsultantSteven Polzin, USF. CUTR

Melanie Rapino, CensusNanda Srinivasan, TRB

Transportation Director, NARCLiang Long, Technical Adjunct

Chair: Tracy Larkin-Thomason, NV (Region IV)Vice Chair: Susan Gorski , MI (Region III)AASHTO Liaison:: Penelope Weinberger

17 voting members: 9 states and 8 MPOs

Guided by an AASHTO Oversight Board

CTPP Data Products

CTPP data products use data from the US Census Bureau American Community Survey (ACS)

The ACS replaced the decennial census “long form” and requires accumulation of data over multiple years for small area tabulation

1 Year of data for places with 65,000+ people

3 Years of data for places with 20,000 + people

5 Years of data for smaller geographic areas, e.g. Tracts and Block Groups

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Applications of CTPP Data Products

• Performance measurement

• Modal share analysis• Environmental justice• FTA New Starts/Small

Starts• Travel Demand

Modeling

• Livability analysis• Corridor planning• Air quality modeling• Trend analysis• Descriptive statistics• Travel forecasting

Some Key Data Items Include

• Data on Households– Size, income, vehicles per household

• Data on Workers– Age and gender, occupations, earnings

• Data on Journey to Work– Usual mode to work, commuting time, work

departure time

• Data on Workplaces– Work locations, times of arrival at work

CTPP Data Concepts

Summarized data by Place of Residence Place of Work Flows from Home to Work

Custom Geography (Local TAZs)

Unique Universes (e.g. workers in HHs)

CTPP Data Products

CTPP Has three main data products but our focus today is only on one

Data Profiles

CTPP 3-year Tables

CTPP 5-year Tables

The CTPP 5-year Tables

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Requires Disclosure Proofing

5-year CTPP Data Product (2010 CTPP5)

(2010 CTPP5) Product Summary

Highlights Low LightsBased on CTPP2000 Tables

Many NEW 1-way Tables

More Age Tables

Streamlined Race Tables

More HH and HH Lifecycle Tables

More Geographic breakdowns or levels

New TADs

Way more Flows Tables

RoundedLimited Number of Crosstabs with Mode

-- Travel time-- Household income-- Vehicle availability-- Age-- Time leaving home-- Minority status-- Presence of children

Tables will have Disclosure Proofing

Large MOEs (@ 90%)

Disclosure Rules Eliminated

NCHRP 08-79 ($550K)Web Report 180

Producing Transportation Data Products from the ACS that Comply With Disclosure Rules

NCHRP is funded by State DOTs SP&R

http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_w180.pdf

Table Summary using 5-year Table list

Means of transportation Aggregate Vehicles UsedAggregate Travel Time Mean HH IncomeAggregate HH Income Aggregate CarpoolsAlmost all Part 3 Tables

Tables Using Disclosure Proofed Data Set

http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_w180.pdf

TAZ/BG Tract TAD Place County PUMA StatePart 1

Regular 111Disc. Proofed 77

Part 2Regular 50Disc. Proofed 65

Part 3Regular 2Disc. Proofed 38

5-year Geography and Flows

● Asymmetrical Flows (in red)

● Small Areas defined by MPOs in MPO areas and States Elsewhere

● Tracts are Defaults for Small Areas

● Default TADs defined by AASHTO

● UZA tables for Part 1 ONLY

● MCD Only States

FROM / Residence TO / Workplace

State State

State-County State-County

State-County-MCD State-County-MCD

State-County-Place State-County-Place

MSA MSA

State-County State-Place

State-County-MCD State-Place

State PUMA (2000) State-Place

PUMA (2000) POW PUMA (2000)

Tract Tract

TAD TAD

Locally Defined Small Area Locally Defined Small Area

TAD Locally Defined Small Area

Locally Defined Small Area TAD

State-Place Locally Defined Small Area

Locally Defined Small Area State-Place

2000POW PUMAs

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What is a POW PUMA?

State PUMAPOW

PUMACA 233 72IL 87 36

ME 10 10NC 58 48WA 46 22

If the county contains two PUMAs, then those two PUMAs will be aggregated to form a POW PUMA

If a county contains only a portion of a PUMA, the POW PUMA will encompass the county containing the rest of the PUMA   

2000PUMAs

POW PUMAsMust comprise a whole county or multiple counties

http://www.census.gov/geo/reference/pdfs/puma/puma_tutorial.pdf

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PUMAs to POW PUMA

Who delineated the POW PUMAs?

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Recapping Geography

● Small Areas defined by MPOs in MPO areas and States Elsewhere

● Tracts are Defaults for Small Areas

● Default TADs defined by AASHTO

● Urbanized Area tables only available for Part 1 data

● MCD Only in 12 States

Penelope WeinbergerCTPP Program Manager, AASHTO444 North Capitol Street NE Suite 249Washington, DC 20001202-624-3556pweinberger@aashto.orghttp://ctpp.transportation.org

Special Staff and Contacts

Brian McKenzieCTPP Program ManagerCensus Bureau301-763-2454

Brian.McKenzie@census.gov

Liang LongCTPP Technical Support FHWA202-366-6971liang.long@dot.gov

Resources

CTPP List Serve

http://trbcensus.com

“Status Report” newsletter

http://www.fhwa.dot.gov/planning/census_issues/ctpp/status_report/

http://www.trbcensus.com/newsletters.html

FHWA website

http://www.fhwa.dot.gov/planning/census_issues/ctpp/

AASHTO website

http://ctpp.transportation.org/

Training Materials

http://ctpp.transportation.org/Pages/trainingresources.aspx

AASHTO CTPP Website

E-Learning

Recorded Webinars

http://ctpp.transportation.org/Pages/webinardirectory.aspx

http://ctpp.transportation.org/Pages/elearningmodules.aspx

CTPP websites

http://www.fhwa.dot.gov/planning/census_issues/ctpp/

http://www.TRBcensus.com

http://ctpp.transportation.org