Freight Facts and Figures 2011

Table 5-13. Freight Nitrogen Oxides (NO_x) and Particulate Matter (PM-10) Emissions by Freight Transportation Mode: 2002

Most PM-10 emissions come from agricultural fields, wildfires, and fugitive dust. Consequently, freight transportation is a minor factor when considering total PM-10 emissions.

Table in Excel format

Mode	NOx Emissions				PM-10 Emissions
	Tons (thousands)	Percent	As a percent of:		Tons (thousands)	Percent	As a percent of:
			All mobile sources	All sources			All mobile sources	All sources
Heavy-duty vehicles	3,782.0	66.8	33.0	17.9	120.0	64.7	23.3	0.5
Freight railroads	857.2	15.1	7.5	4.1	21.3	11.5	4.1	0.1
Marine vessels	1,011.0	17.9	8.8	4.8	44.0	23.7	8.5	0.2
Air freight	8.2	0.1	0.1	0.0	0.3	0.2	0.1	0.0
Total	5,658.4	100.0	49.4	26.8	185.6	100.0	36.0	0.8

Note:

Numbers and percents may not add to totals due to rounding.

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 August 22, 2011.

 

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