Table 1: Data Sources for the Transportation Services Index

Table 1: Data Sources for the Transportation Services Index

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Mode Source Measure
Freight Trucking American Trucking Associations Index of tonnage
  Air BTS and carrier websites Freight of ton-miles
  Rail Association of American Railroads Carloads & Intermodal units
    Federal Railroad Administration Quarterly ton-miles
  Water U.S. Army Corps of Engineers Tons
  Pipeline Energy Information Administration Thousands of barrels, billion cubic feet
Passenger Air BTS and carrier websites Revenue passenger-miles
  Rail Federal Railroad Administration Revenue passenger-miles
  Transit American Public Transportation Association Unlinked trips

SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, 2007