|Round trip miles||SE|
|All long-distance trips||209||2.5|
KEY: SE = standard error.
NOTE: Excludes trips where mode was not reported. Other includes watercraft (e.g, such as ship, ferry, and motorboat); taxi, limousine, and hotel/airport shuttle; bicycle and walking; and other not elsewhere classified.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and Federal Highway Administration, 2001 National Household Travel Survey data, CD-ROM, February 2004.