Freight Facts and Figures 2008
Table 5-13. Current and Projected Nitrogen Oxides (NOx) Emissions by Freight Transportation Mode: 2002, 2010, and 2020
Trucks are by far the largest contributor to freight emissions nationally, producing two-thirds of NOx from the freight sector. However, freight emissions of NOx are forecast to decline by almost two-thirds over the next two decades. Beginning in June 2006, the U.S. Environmental Protection Agency required the use of ultra low sulfur diesel (ULSD) fuel in heavy-duty trucks and other diesel-powered highway vehicles. ULSD will reduce emissions of NOx and enable the use of advanced pollution control technologies to meet emissions standards.
 |
Tons 2002 |
Tons 2010 |
Tons 2020 |
Percent change, 2002-2010 |
Percent change, 2002-2020 |
|---|---|---|---|---|---|
| Heavy-duty trucks | 3,782,000 | 2,186,900 | 662,600 | -42 | -82 |
| Freight rail | 857,200 | 563,200 | 486,400 | -34 | -43 |
| Commercial marine | 1,011,000 | 987,200 | 938,600 | -2 | -7 |
| Air freight | 8,200 | 10,000 | 12,400 | 22 | 51 |
| Freight total | 5,658,400 | 3,747,299 | 2,099,999 | -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, April 2005, available at www.fhwa.dot.gov/environment/freightaq/ as of April 24, 2008.
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