Although information rich, NPTS data are not recommended for drawing conclusions on travel in areas smaller than a Census division. Extrapolating NPTS data within small areas could risk developing and subsequently using unreliable estimates. Thus, we have developed a methodology to "transfer" the results of the 1995 NPTS to smaller communities.
For in-depth information on the methodology used, see Transferability Of Nationwide Personal Transportation Survey Data To Regional And Local Scales [PDF].
For another explanation of our methodology, including an example of how transferability allows for estimates of smaller communities, download the PowerPoint presentation here [PPS]. NOTE: This presentation is embedded in the spreadsheet below. You do NOT need to download it if you download the spreadsheet.
We have also developed a spreadsheet to enable users to get results for cities, counties, and metropolitan statistical areas (MSAs). The spreadsheet includes a presentation in PowerPoint format to give a user an introduction to the methodology. You will be required to view the presentation the first two times you open the file.
SYSTEM REQUIREMENTS: Microsoft Excel 97 or later AND Microsoft PowerPoint 97 or later.
Download the spreadsheet here [XLS].
The Excel file below contains the nation's Census tracts and their corresponding clusters ("Tracts" tab), along with overall daily trip and mileage rates per household for each cluster ("Key-Trip Rates" tab).
Download the Excel file here [XLS].