TABLE 30a Person-Miles by Mode: 2001,, ,, ,Miles (millions),Percent of total Personal vehicle,"3,531,205",88.1 Air,"322,801",8.1 Transit,"44,890",1.1 School bus,"45,431",1.1 Bicycle/walk,"32,397",0.8 Other,"32,821",0.8 Total reported,"4,009,545",100.0 " 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, National Household Travel Survey, Preliminary Data Release Version 1, available at http://nhts.ornl.gov/, as of January 2003.",,