Figure 5 - Investment in transportation infrastructure as percentage of GDP by mode and by sector, average for 1987-2003

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Note:
Details do not add to the total investment, because the total includes parking and investments of establishments involved in transportation supporting activities.

Sources:
BTS calculations based on data from the following sources:
U.S. Department of Commerce, Bureau of Economic Analysis (BEA), "Fixed Assets Tables," and "National Income and Product Accounts Tables," Washington, D.C.
Executive Office of the President of the United States, Office of Management and Budget, "Budget of the United States Government - Public Budget Database," and "Budget of the United States Government - Appendix," Washington, D.C.
U.S. Department of Commerce, U.S. Census Bureau, "State and Local Government Finance Estimates," and "Value of Construction Put in Place," Construction Survey, Washington, D.C.
Saint Lawrence Seaway Development Corporation, "Annual Report," annual issues.
Amtrak, "Amtrak Annual Report," Washington D.C.
Personal Communication with U.S. Army Corps of Engineers.