NOTES: Investment in transportation infrastructure includes the purchase or construction value of transportation facilities and structures. Data on state and local transportation investment are not available separately. For rail infrastructure, only state and local investment from 1993 to 2000 are included. Government investment in pipeline infrastructure and federal investment spending on railroads are not covered due to lack of data. Investment in rolling stock consists of government outlays for motor vehicles only. Government spending on other rolling stocks (e.g., aircrafts, vessels, and boats) and other machinery and equipment used by federal, state, and local DOTs are not counted in the estimates due to lack of data. All dollar amounts are expressed in chained 1996 dollars, unless otherwise specified. Current dollar amounts (which are available in appendix B of this report) were adjusted to eliminate the effects of inflation over time.
SOURCES: U.S. Department of Transportation, Bureau of Transportation Statistics, "Transportation Investment-Concepts, Data and Analysis," draft, compiled based on data from U.S. Department of Commerce (USDOC), Bureau of Economic Analysis (BEA), "Fixed Assets and Consumer Durables," and personal communications with BEA; and USDOC, U.S. Census Bureau, "Value of Construction Put in Place Statistics," Detailed Construction Expenditure Tables, available at http://www.census. gov, as of February 2003.