[CTPP] History of CTPP

I was recently asked about 1970 and 1980 journey-to-work data at the tract level, so I thought I would share some historic materials. Bottom line, around 1998 and 1999, we attempted to collect 1980 UTPP files, but were able to find only about 20 files, which are stored at Cambridge Systematics and available via ftp. For more information, please contact ctppsupport@camsys.com<mailto:ctppsupport@camsys.com> The CTPP program was not nationwide until the 1990 Census long form tabulation. In 2010, Ed Christopher and I wrote a chapter for the Encyclopedia of the U.S. Census about Transportation Uses of Census Data, which include a very brief summary of the CTPP. This book is a reference document, I think, mostly found at libraries. Margo J. Anderson, Constance F. Citro, & Joseph J. Salvo (Eds.). (2012). Encyclopedia of the U.S. census. (2nd ed.). Washington, DC: CQ Press. doi: http://dx.doi.org/10.4135/9781452225272 I have attached a couple of alternate sources: 1. A 2008 ppt from Ed Christopher, as a PDF file. Perhaps we can ask Ed to update his slides with information about the 2006-2010 CTPP, and the AASHTO CTPP Oversight Board. 2. A few scanned pages from the 1994 TRB Conference on "Decennial Census Data for Transportation Planning", written by Phil Fulton, who was at the Census Bureau Journey to Work branch. One interesting sentence to me was about updating GBF/DIME files in the 1980s, the predecessor to the TIGER files. The 1980 UTPP were delivered to transportation agencies on 9-track tapes. Elaine Murakami FHWA Office of Planning 206-220-4460 (in Seattle)