Table 5-13. Current and Future Nitrogen Oxides (NOx) Emissions by Freight Transportation Mode: 2002, 2010, 2020
Freight emissions of NOx are forecast to decline by almost two-thirds over the next two decades. Trucks are by far the largest contributor to freight emissions nationally, producing two-thirds of NOx from the freight sector. The U.S. Environmental Protection Agency passed new rules requiring the use of ultra low sulfur diesel (ULSD) fuel in heavy-duty trucks and other diesel-powered highway vehicles beginning in June 2006. ULSD will reduce emissions of NOx and enable the use of advanced pollution control technologies to meet 2007 emissions standards.
Table in Excel format | Historical data
 |
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, 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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