Billions of current dollars
KEY: U = data are unavailable.
NOTES: Investment in transportation infrastructure constitutes the purchase or construction value of transportation facilities and structures. Data include all modes except pipeline. In addition, federal government data on rail infrastructure investments are not available, and state and local rail infrastructure investment data are only available from 1993-2000. State and local transportation investment data are not available separately.
SOURCES: U.S. Department of Transportation, Bureau of Transportation Statistics, "Transportation Investment-Concepts, Data and Analysis," draft, May 29, 2003. U.S. Department of Commerce, U.S. Census Bureau, "Value of Construction Put in Place Statistics," Detailed Construction Expenditures Tables, available at http://www.census.gov, as of February 2003.