Census Transportation Planning Products
The CTPP is a set of special tabulations designed by transportation planners using large sample surveys conducted by the Census Bureau. From 1970 to 2000, the CTPP its predecessor, the Urabn Transportation Planning Product, used data from the decennial census long form. The decennial census long form has now been replaced with a continuous survey called the American Community Survey (ACS). Therefore, the CTPP now uses the ACS sample for the special tabulation.
The first CTPP using the ACS is the 2006-2008 CTPP, using 3 years of the ACS and is restricted to geographic units (counties and places) and population of 20,000 or more. The 2006-2010 CTPP, using 5 years of ACS was delivered to the American Association of State Highway and Transportation Officials (AASHTO) in May 2013 and included small geographic units such as census tracts and Transportation Analysis Zones (TAZs). The next CTPP data release is scheduled for mid-2015.
The CTPP collects data on Journey-To-Work travel only.
The CTPP tabulations are uniqure because they include three geographies:
- Part 1: Residence-based tabulations summarizing worker and household characteristics
- Part 2: Workplace-based tabulations summarizing worker characteristics
- Part 3: Worker flows between home and work, including travel mode
Source: U.S. Department of Transportation, Federal Highway Administration