"Our vision is to continuously improve and update Data.gov with a wide variety of available datasets and easy-to-use tools based on your feedback, in partnership with the Government." The Dept. of Transportation's push for public access to data sets grows stronger with the following page:
Links:
[1] http://www.library.northwestern.edu/libraries-collections/evanston-campus/transportation-library
[2] http://www.data.gov/suggestdataset