[CTPP] Accessing Part 3 data for TAZs and other detailed geography

In my previous message (copied below), I did not provide directions on how to access the most recently loaded Part 3 ASCII data on the BTS TransStats website. We've had some questions about where the taz and other detailed geography flow data can be found, so I'm providing the directions below. 1) Go to www.transtats.bts.dot.gov 2) Click on the CTPP 2000 button on the upper right side of the page 3) On the CTPP 2000 page there are four sections: Part I, Part II, Part III, and Part III Selected. The first Part III section contains data for summary levels from state through census tract. The Part III Selected section contains the State DOT and MPO detailed geography summary levels (see below). 4) To access the State DOT and MPO detailed geography data for Part III, click on the "CTPP 2000 Part III Selected" link. These files contain data for summary levels 942 (State DOT detailed geography) and 944 (MPO detailed geography). Click on the "Download" link, select your state, and then click on the download button to save the file to your computer. The downloaded zip file will contain two zip files within it. One of these contains the documentation files and the other the data files. The zip file with the data in it contains more zip files within it. There will be one file containing the State DOT detailed geography (e.g., mo_ascii.zip for Missouri), and a number of other files, one for each MPO in the state (e.g., mpo1741.zip for the Columbia MPO). If you have any questions about these instructions, please contact either Nanda Srinivasan at nanda.srinivasan(a)fhwa.dot.gov or 202-366-5021 or Clara Reschovsky at clara.a.reschovsky(a)census.gov or 301-763-2454. ----------------------------------------------------------------- Phillip A Salopek To: ctpp-news(a)chrispy.net 05/28/2004 02:45 cc: PM Subject: State DOT and MPO Review of CTPP 2000 Part 3 Data State Departments of Transportation and Metropolitan Planning Organizations: As announced earlier this week, all the CTPP 2000 Part 3 files (journey-to-work flow data) are now available in ASCII format for downloading from the BTS TranStats website at http://www.transtats.bts.dot.gov. Unlike Parts 1 and 2, only these ASCII files will be available for Part 3 in a preliminary version for review by the State DOTs and MPOs. The reason for this is that we will not have a revised version of the CTPP Access Tool (CAT) software that can handle the Part 3 flow data soon enough to be used in the review. We encourage you to download the ASCII files for your area and evaluate the data as soon as you can. To assist you in your review we have provided a data dictionary, Microsoft Access template, and dbase specs file for Part 3. The files in Part 3 are more manageable than the previous CTPP 2000 data because there are fewer tables and the records are therefore shorter. However, there are large numbers of records in some of the files so the databases can still be quite big. Errors that come to our attention based on review of the ASCII files will be fixed before the CAT software version of the data become available. We expect to distribute the CAT software version of the final Part 3 data late this summer. Stay tuned to the CTPP listserve for details. --Phil Salopek Chief, Journey to Work and Migration Statistics Branch U.S. Census Bureau (301) 763-2454