|Estimates of input-output accounts, 1997||U.S. Department of Commerce, Bureau of Economic Analysis, Benchmark Input-Output Accounts for the U.S. Economy, 1997 and detailed underlying data files for the I-O accounts|
|Air||General aviation aircraft (private) by industry||General Aviation Manufacturer's Association (GAMA) proprietary database|
|Rail||Private railcars by private shipper||Official Railway and Equipment Register, Commonwealth Business Media, East Windsor, New Jersey.|
|Truck||Trucks, truck mileage, fuel use by industry and vehicle type, 1997a||U.S. Department of Commerce, Census Bureau, 1997 Census of Transportation, Vehicle Inventory and Use Survey microdata.|
|Statistics on occupation and industry, 2000||Census Bureau, 2000 Census of Population and Housing Occupation and Industry.|
|Energy use by industry, 1997||U.S. Department of Energy, Energy Information Administration, Annual Energy Review 2008, tables 5.13a-5.13d.|
|Energy use by transportation modes, 1997||U.S. Department of Energy, Oak Ridge National Laboratory, Transportation Energy Data Book: Edition 28.|
|Vehicle-miles of travel by type of vehicles, 1997||U.S. Department of Transportation, Federal Highway Administration, Highway Statistics. Reported in U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics: Chapter 1, section C, table 1-32 [as of April 2010].|
|Water||Private water vessels by industry||U.S. Department of Defense, Army Corpos of Engineers, Vessel Company Summary and Vessel Characteristics from the Waterborne Transportation Lines of the United States (WTLUS).|
a Data for these measures were extracted for all trucks of all chassis except those used for personal use, not used (wrecked, awaiting repair, etc.) for more than 6 months, or used for only off-road purposes (e.g., primary trip is off a public road).
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics.