|Passenger travel (2001)| |Daily trips per person||R4.1| |Daily
trips per person per yeara||R1483| |Daily miles per person||R40|
|Daily miles per person per yeara||R14524| |Freight
transportation (2000)| |Tons per person, annually||50.3| |Ton-
miles per person, annually||13,846| Notes: Data used for
passenger travel are from the National Household Travel Survey
(NHTS) travel-day file and include trips of all lengths made by
respondents on a single day; about 95 percent of these daily
trips were 30 miles or less. Calculations are based on weighted
estimates from the 2001 NHTS. Sources: Passenger-USDOT, Federal
Highway Administration and Bureau of Transportation Statistics,
National Household Travel Survey, available at
http://nhts.ornl.gov/2001/index.shtml, as of December 2003.
Freight-USDOT, Bureau of Transportation Statistics, and U.S.
Department of Commerce, U.S. Census Bureau, 1997 Commodity Flow
Survey (Washington, DC: 1999); BTS special tabulations, October
2002.