(Chained 1996 $ in billions)
SOURCES: U.S. Department of Transportation (USDOT), Bureau of Transportation
Statistics, compiled from:
Federal highways and transit: USDOT, Federal Highway Administration, Highway Statistics (Washington, DC: Annual issues), table FE-210, pp. IV-22 (Historical Data).
Federal air: USDOT, Federal Aviation Administration, Budget in Brief (Washington, DC: Annual issues), available at http://www.faa.gov/aba/html_budget/index.html, as of October 2001.
Federal water and pipeline: Executive Office of the President of the United States, Office of Management and Budget, Budget of the United States Government: Appendix (Washington, DC: Annual issues).
State and local: U.S. Department of Commerce (USDOC), U.S. Census Bureau, "State and Local Government Finance Estimates," available at ftp://ftp.census.gov/pub/outgoing/govs/, as of October 2001.
Chain-type price index: USDOC, Bureau of Economic Analysis, "National Income and Product Accounts Tables," 2001, table 7.1, Quantity and Price Indexes for Gross Domestic Product, available at http://www.bea.doc.gov/bea/dn/nipaweb/, as of October 2001.