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