[CTPP] TAZ delineation in Calendar 2011

Dear Everyone - We are awaiting the delivery of the first 3-year CTPP using 2006-2008 ACS records. This CTPP is restricted to large geography (county, places with 20,000 population and over). Our goal was to have web-accessible data in September 2010, but today we learned that the CB now has a delay of 2 weeks, which MAY impact the delivery schedule from Beyond 2020 and Citygate, the CTPP data access software vendors. We will keep you updated. In the meantime, you are probably putting together your annual workplans and I want to remind everyone who plans to submit TAZ (and TADs) for the 5-year CTPP tabulation to include labor hours for Spring and Summer 2011 for this task. For a copy of the TAZ delineation business rules: http://download.ctpp.transportation.org/TAZ_Rules/TAZ%20Delineation%20Bu siness%20Rules_CTPP%20Final.pdf Q. Do you have to define TAZs or TADs? A. No, you can still get CTPP tabulations for Census tracts or Census block groups if you do not want to delineate TAZs. Q. What is a TAZ and what is a TAD? A. A TAZ is a Transportation Analysis Zone and is the smallest geographic unit for which the CTPP tabulations will be provided. A TAD is a Transportation Analysis District, and will either be an accumulation of TAZs, or accumulation of tracts, to total approximately 20,000 population. This will provide a geographic unit that is smaller than a PUMA (100,000 population), and larger than a census tract (4,000 population). The TAD is larger geographic unit which has the potential to be used in nation-wide tabulations for 3-year ACS tabulations in the future. Q. What process will be used to submit TAZs? A. some of you probably saw the Caliper announcement that they will be developing the software for the Census Bureau's Geography Division for this part of the CTPP. It will be a GIS-based application and will not require you to purchase or license any additional software. It will be a block-equivalency program. That is, you are restricted to existing Census-defined blocks. This means that your agency's TAZ for your forecasting model may not exactly match the TAZ submitted for the CTPP tabulation. Elaine Murakami FHWA Office of Planning 206-220-4460