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I'm looking for vehicle travel data in the USA - at any spatial resolution smaller than the unit of a state, and ideally at a city level. I'm interested in daily, or weekly data and also any information about whether the trip is to work or not.

Two sources that I have previously found are the Texas Transportation Institute Urban Mobility Report, and vehicle miles traveled at a 250m gridcell for Massachusetts from the MAPC link (data is available, but site currently has a problem)

I've looked at the Federal Highway Administration FHWA site which has a special GIS section, but I'm struggling to find data on the site outside of reports in the form of pdfs.

Are there any other sources of data that are available that I have overlooked?

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Are you looking for AADT or hourly data and in how many vehicle class bins? Also historical or live? –  dassouki Aug 21 '11 at 15:12
    
Ah, good points - just updated my question. –  djq Aug 21 '11 at 16:27
    
I'm sorry I haven't gotten back to you. Did you find the data you were looking for? –  dassouki Sep 13 '11 at 10:49
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1 Answer 1

The National Highway Travel Survey collects the trip information you're looking for and can be found here for all the US.

First I would start looking at the FHWA planning data warehouse. If that doesn't help, you have a few options:

  1. Contact the major state and urban DOT / MTO and they'll usually give you the data you're looking for. This option yields the most accurate and up to date data; however you want your data to match the survey data. Actually for a number of the states, they have their traffic data online.
  2. Obtain a copy of TransCAD - Traffic Data. TransCAD is a software used by transportation modellers. With the software package comes a cd that has traffic counts for the US.
  3. The Bureau of Transportation statistics contains transportation data related to entry points into the US, intermodal activities, and other related data
  4. The NAtional Highway Transportation Safety Administration provides some data too. NASS General Data and Traffic Records
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I also have a lot more resources than this. Start up here, if that doesn't get you anywhere, comment on this with what you're missing and I shall see what I can do –  dassouki Aug 21 '11 at 17:18
    
Thanks - just reading through the links. Can the NHTS be easily related to tracts? If estimates of total distances are given I could just aggregate to each city I am interested in. –  djq Aug 21 '11 at 18:21
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I haven't worked with NHTS in 8 years or so. I'll check for you at the office on Monday and see if I can track down older projects –  dassouki Aug 21 '11 at 18:24
    
I was wondering, were you able to get the data you needed? –  dassouki Nov 23 '11 at 12:48
    
I wasn't able to find it - I used the Texas data as a temporary measure, but I am still interested in a high resolution measure of traffic data. Thanks for following up. –  djq Nov 23 '11 at 18:14
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