_______________________________________________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
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The CTPP program was not nationwide until the 1990 Census long form tabulation.��
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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
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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.�� ��
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Elaine Murakami
FHWA Office of Planning
206-220-4460 (in Seattle)
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