The 1990 Journey to Work files from http://www.transtats.bts.gov/ has worker trips specified by mode of transport, including how many people are in a carpool, which enables me to figure out the actual car traffic. The 2000 data from http://www.census.gov/population/www/cen2000/commuting.html only seems to have total numbers of workers, not their modes of transport. Does anyone know where I can get the more detailed information that I was able to get from the 1990 data? Thank you. Harvey Michaels U.S.EPA, Office of Transportation and Air Quality Assessment and Standards Division 734-214-4184