|Trip purpose||Percent||Number (millions)||SE (millions)|
KEY: U = data are unavailable. SE = standard error.
NOTES: Other includes spending the night, giving someone a ride, and responses not elsewhere classified. Excludes trips where purpose was not reported.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and Federal Highway Administration, 2001 National Household Travel Survey data, CD-ROM, February 2004.