Index: 1980 = 100
Sources: Air, oil pipeline, and waterU.S. Department of Transportation (USDOT), Bureau of Transportation Statistics (BTS), National Transportation Statistics 2002, table 1-44 revised, available at http://www.bts.gov, as of October 2003. TruckBTS calculation based on USDOT, BTS, Transportation Statistics Annual Report 2000 (Washington, DC: 2001), p. 124, table 2; USDOT, BTS, U.S. International Trade and Freight Transportation Trends (Washington, DC: 2003), figure 14; USDOT, BTS, Maritime Trade and Transportation 2002 (Washington, DC: 2002), table 1-20; USDOT, Federal Highway Administration, Highway Statistics 2001 (Washington DC: 2002), table VM-1. RailSurface Transportation Board, Carload Waybill Sample; BTS calculation based on Transport Canada, Transportation in Canada (Ottawa, Ontario: Annual issues), table 12-1; American Association of Railroads, Railroad Facts (Washington, DC: 1991 and 2001), p. 36. Gas pipelineBTS calculation based on U.S. Department of Energy, Energy Information Agency, Annual Energy Review 2001, table 6.5, and International Energy Annual 2001, table C-1, both available at http://www.eia.doe.gov, as of December 2003.