Freight Facts and Figures 2010

Table 5-13. Current and Projected Nitrogen Oxides (NO_x) Emissions by Freight Transportation Mode: 2002, 2010, and 2020

Trucks are by far the largest contributor to freight emissions nationally, producing two-thirds of NO_x from the freight sector. However, as noted earlier, freight emissions of NO_x have declined significantly since the U.S. Environmental Protection Agency required the use of ultra low sulfur diesel fuel in heavy-duty trucks and other diesel-powered highway vehicles beginning in 2006.

Table in Excel format

	Tons (thousands) 2002	Tons (thousands) 2010	Tons (thousands) 2020	Percent change, 2002 to 2010	Percent change, 2002 to 2020
Heavy-duty trucks	3,782.0	2,186.9	662.6	-42	-82
Freight rail	857.2	563.2	486.4	-34	-43
Commercial marine	1,011.0	987.2	938.6	-2	-7
Air freight	8.2	10.0	12.4	22	51
Total freight	5,658.4	3,747.3	2,100.0	-34	-63

Source:

U.S. Department of Transportation, Federal Highway Administration, Assessing the Effects of Freight Movement on Air Quality at the National and Regional Level, Final Report (Washington, DC: 2005), available at www.fhwa.dot.gov/environment/freightaq/ as of June 2, 2010.

 

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