"Federal transportation expenditures consist of outlays of the federal government including only direct spending, not including grants to state and local governments. ",,,,,,,,,,,,,
TABLE G-22 Federal Government Transportation Expenditures by Mode: FY 2003,,,,,,,,,,,,,
,Chained 2000 dollars (billions),Percentage of total,,,,,,,,,,,
Total ,39.3 ,100.00,,,,,,,,,,,
Highway,2.9 ,7.43,,,,,,,,,,,
Transit,4.2 ,10.69,,,,,,,,,,,
Railroads,1.1 ,2.86,,,,,,,,,,,
Air ,15.7 ,39.92,,,,,,,,,,,
Water,5.4 ,13.84,,,,,,,,,,,
Pipeline,0.0 ,0.10,,,,,,,,,,,
General Support,9.9 ,25.16,,,,,,,,,,,
"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 2007 as of August 2007.",,,,,,,,,,,,,