DATA R US Personal Travel Data, including CTPP and NPTS DATA R US Personal Travel Data, including CTPP and NPTS Portland State University April 29, 2005.
1 ACS Data Products for Use in Transportation Planning: 2004 and Beyond By Phillip Salopek Chief, Journey to Work and Migration Statistics Branch Population.
American Community Survey . Continuous Survey Methodology 250,000 Households sampled per month About 1 in 40 Households sampled per.
Census Transportation Planning Products (CTPP) Data Products June 18, 2010.
