Re: [CTPP] RE: TAZ delineation for CTPP (2006-2010) tabulation SCHEDULE

I'll just jump in. I am on the CTPP Oversight Committee that prepared the "Business Rules" for delineating the TAZs for which Census will report the data. Census has been collecting journey to work data through the American Community Survey nationwide since 2006 that will go into the CTPP 2006-2010 tabulation. They need all of us FIRST to delineate our TAZs for them to create the tabulation. So you won't be able to wait to see the data first in order to determine how best to delineate your TAZs. Sometime around December of this year, the 2005-2009 5-year dataset will come out, providing data down to the block group level (2000 census block group geography), and you may find that useful in determining how you want to delineate your TAZs. It won't be exactly what you are looking for geographically, the standard tables will not be as specifically tailored to transportation modelers, and the data won't be benchmarked to this year's decennial census like the 2006-2010 dataset will. But it may give you some useful data. Pete Swensson, Senior Planner Thurston Regional Planning Council 2424 Heritage Ct. SW Olympia, WA 98502 (360) 741-2530 (direct line) (360) 956-7575 (main desk) (360) 956-7815 (fax) swenssp(a)trpc.org This e-mail and any attachments are for the use of the addressed individual. If you have received this e-mail in error, please notify our systems manager. TRPC has taken responsible precautions to ensure no viruses are present in this e-mail, however we do not accept responsibility for loss or damage arising from the use of this e-mail or attachments. From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Curt Hutchings Sent: Friday, October 08, 2010 12:20 PM To: ctpp-news(a)chrispy.net Subject: [CTPP] RE: TAZ delineation for CTPP (2006-2010) tabulation SCHEDULE Elaine, Please excuse my ignorance. I have had questions about how the Census Dept. would collect TAZ data for the Census. I have been waiting for information like you have provided below. Can you give me any additional information? We are in the process of modifying our TAZ structure now and want, If possible to use the new information in this count. Any thoughts? Thanks, From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Elaine.Murakami(a)dot.gov Sent: Wednesday, October 06, 2010 10:32 AM To: ctpp-news(a)chrispy.net Subject: [CTPP] TAZ delineation for CTPP (2006-2010) tabulation SCHEDULE At our monthly CTPP Technical meeting last week, April Avnayim of the Census Bureau Geography Division, gave us an update on the TAZ delineation software schedule. November 2010: agencies verify contact names by reviewing file at Cambridge Systematics ftp site, and report any changes to Liang Long. December 2010: final delivery of software by Caliper to CB February 2011: web-based training coordinated with FHWA January thru March 2011: delivery of software and Census 2010 data and geographic files on a rolling basis. Each state will get 3 - 4 months to delineate their TAZ and TADs and return the files to the Census Bureau. July 2011: all files MUST be returned to CB Geography Division. Please note: TAZs for CTPP tabulation do not necessarily match the TAZs for your travel demand model. Because the ACS sample is small, some agencies are planning to make the TAZs for CTPP LARGER than their model TAZs, e.g. combining their model TAZs together. Also, TAZs for CTPP are census block equivalencies. You will NOT be able to modify the TIGER segments (which was possible in the CTPP2000). Finally, agencies are NOT required to define TAZs or TADs. If you do not define TAZs, then census tracts will be used as the default geography for CTPP (2006-2010) tabulation. However, even if you do not define TAZs, we recommend that you create TADs (population threshold of 20,000) by combining census tracts together. The TAZ business rules are posted on the FHWA webpage: http://www.fhwa.dot.gov/ctpp/tazddbrules.htm <http://console.mxlogic.com/redir/?a8VV5dd5MSyeKCy-r01eAP6Yxmv4qCsJdpr9W a8848JD_jw26XYDuZXTLuZPtPtFHb5UuoEn8lrxrW0GNecGb5K1FJ54QsLfCQkTD6nCknxNJ NwSqmN84xob6BQQg0Ag0AQg8uva7Xelo6y1SIjh090Ab1oQg6yxeZT2WtQrCyAQgjQwSvIVl wq81wi2UQ71cazhEwdPYfDwedECQjqbwUQszDSjhOrovBc> ------------------------------------------------------------------------ _______________________________________________ ctpp-news mailing list ctpp-news(a)chrispy.net http://www.chrispy.net/mailman/listinfo/ctpp-news