Bureau of Transportation Statistics (BTS)
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Table 4
Percent of Long-Distance Trips by Mode and Roundtrip Distance

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Miles 100-299 300-499 500-999 1000-1999 2000+ Total
Personal vehicle 97.2 94.3 85.9 53.9 22.2 89.5
Air 0.2 1.5 10.3 42.4 74.8 7.4
Bus* 1.6 3.4 3.2 2.6 1.4 2.1
Train* 0.9 0.7 0.6 0.9 0.8 0.8
Other* 0.2 0.1 0.0 0.1 0.8 0.2

See table A-23 for standard errors.

* Differences are not significant at a=0.05.

SOURCE: The 2001 National Household Travel Survey, preliminary long distance file, U.S. Department of Transportation.