NOTE: Data are from the
daily travel segment of the 2001 National Household Travel Survey.
Long-distance travel data (i.e., trips of 50 miles or more collected during
a 4-week travel period) are not included here.
SOURCE: U.S. Department of
Transportation, Bureau of Transportation Statistics and Federal Highway
Administration, 2001 National Household Travel Survey (NHTS), Preliminary
Data Release Version 1, available at http://nhts.ornl.gov/, as of January
2003.
