Federal transportation expenditures consist of federal government direct spending only, excluding grants to state and local governments.
|Chained 2000 dollars (billions)||Percentage of total|
NOTES: Data may not add to total and percentages may not add to 100 because of independent rounding. To eliminate the effects of inflation over time, the Bureau of Transportation Statistics converted current dollars to chained 2000 dollars.
SOURCE: U. S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Government Transportation Financial Statistics 2008, available at http://www.bts.gov/publications/government_transportation_financial_statistics/.