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About CTPP

CTPP is a set of special tabulations from decennial census demographic surveys designed for transportation planners. From 1970 to 2000, the CTPP and its predecessor, UTPP, used data from the decennial census long form. Because of the large sample size, the data are reliable and accurate.

The CTPP 2000 is divided into three parts.

• Part 1 contains residence end data summarizing worker and household characteristics
• Part 2 contains place of work data summarizing worker characteristics
• Part 3 contains contains journey-to-work flow data

To learn more and access CTPP data products, visit the Data Products page.

As the Census Bureau has replaced the decennial census long form with the American Community Survey (ACS), future CTPP will be based on the ACS. In late 2006 the American Association of State Highway and Trasnportation Officials (AASHTO) committed to a new multi-year Census Transportation Planning Products (CTPP) consolidated purchase to begin incorporating of ACS data into transportation planning practices.

More information about CTPP is available at www.trbcensus.com.

About ACS

The American Community Survey (ACS) is a continuous monthly survey conducted by the U.S. Census Bureau which began in 2005. Most of the questions in the ACS are the same (or similar) to the Census 2000 long form. Access the Census Bureau's page on ACS.

Other Data Sources

Longitudinal Employer-Household Dynamics (LEHD) is a program within the U.S. Census Bureau that uses modern statistical and computing techniques to combine federal and state administrative data on employers and employees with core Census Bureau censuses and surveys while protecting the confidentiality of people and firms that provide the data. LEHD is potentially an alternate/additional source of place of work and flow data. Click here to access the Census Bureau's page on LEHD.