Table 5-14. Current and Future Particulate Matter Emissions by Freight Transportation Mode

New U.S. Environmental Protection Agency emissions standards for trucks are expected to significantly reduce emissions, however, even with large increases in truck traffic.

Table in Excel format

	Tons 2002	Tons 2010	Tons 2020	Percent Change, 2002-2010	Percent Change, 2002-2020
Heavy-duty trucks	120,000	65,380	34,760	-46	-71
Freight rail	21,300	17,890	15,360	-16	-28
Commercial marine	44,000	45,330	46,960	3	7
Air freight	300	290	270	-3	-10
Freight total	185,600	128,889	97,349	-31	-48

Source: U.S. Department of Transportation, Federal Highway Administration, Impacts of Freight Movement on Air Quality, prepared by ICF Consulting, January 26, 2005, based on U.S. Environmental Protection Agency, National Emissions Inventory.

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