Table 1: Annual Long-Distance Trips by Mode
|Transportation mode||Trips (millions)||Standard error||% of total trips||Standard error|
NOTES: Totals may not add due to rounding. Only trips in which the transportation mode could be identified are included.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Federal Highway Administration, National Household Travel Survey, long-distance file, 2001 (Washington, DC)