Freight Facts and Figures 2009
Table 5-11. Estimated National Average Vehicle Emissions Rates of Heavy-Duty and Light-Duty Vehicles: 1990-2008 (Historical)
Table in Excel format
Grams per mile
| 1990 |
2000 |
2001 |
2002 |
2003 |
2004 |
2005 |
2006 |
2007 |
2008 |
| Gasoline (assuming zero RFG) |
| Cars |
| Exhaust HC |
2.79 |
0.97 |
0.89 |
0.81 |
0.74 |
0.61 |
0.52 |
0.46 |
0.42 |
0.39 |
| Nonexhaust HC |
1.21 |
0.92 |
0.88 |
0.84 |
0.81 |
0.77 |
0.72 |
0.68 |
0.62 |
0.57 |
| Total HC |
3.99 |
1.89 |
1.77 |
1.65 |
1.54 |
1.37 |
1.25 |
1.13 |
1.04 |
0.95 |
| Exhaust CO |
42.89 |
18.53 |
18.03 |
17.58 |
17.13 |
13.79 |
12.57 |
10.87 |
10.28 |
9.68 |
| Exhaust NOx |
2.70 |
1.29 |
1.25 |
1.20 |
1.14 |
1.00 |
0.92 |
0.79 |
0.73 |
0.67 |
| Light trucks |
| Exhaust HC |
3.68 |
1.45 |
1.35 |
1.24 |
1.13 |
0.96 |
0.78 |
0.69 |
0.64 |
0.55 |
| Nonexhaust HC |
1.36 |
0.97 |
0.94 |
0.89 |
0.84 |
0.80 |
0.76 |
0.71 |
0.66 |
0.62 |
| Total HC |
5.04 |
2.42 |
2.29 |
2.13 |
1.98 |
1.76 |
1.54 |
1.40 |
1.31 |
1.17 |
| Exhaust CO |
56.23 |
26.81 |
25.61 |
24.32 |
22.30 |
18.76 |
16.23 |
14.33 |
13.52 |
12.49 |
| Exhaust NOx |
2.62 |
1.54 |
1.53 |
1.50 |
1.45 |
1.32 |
1.21 |
1.09 |
1.02 |
0.94 |
| Heavy trucks |
| Exhaust HC |
3.66 |
1.22 |
1.09 |
0.98 |
0.82 |
0.73 |
0.64 |
0.53 |
0.48 |
0.42 |
| Nonexhaust HC |
2.74 |
1.62 |
1.54 |
1.48 |
1.41 |
1.35 |
1.24 |
1.14 |
1.07 |
0.99 |
| Total HC |
6.40 |
2.84 |
2.63 |
2.46 |
2.24 |
2.08 |
1.88 |
1.67 |
1.54 |
1.41 |
| Exhaust CO |
85.61 |
31.08 |
27.59 |
24.73 |
20.60 |
18.46 |
16.73 |
14.51 |
13.55 |
12.38 |
| Exhaust NOx |
7.19 |
5.26 |
5.13 |
5.01 |
4.91 |
4.62 |
4.28 |
3.73 |
3.33 |
2.94 |
| Diesel |
| Cars |
| Exhaust HC |
0.68 |
0.80 |
0.76 |
0.73 |
0.73 |
0.60 |
0.58 |
0.48 |
0.36 |
0.29 |
| Exhaust CO |
1.49 |
1.78 |
1.75 |
1.73 |
1.74 |
1.59 |
1.57 |
1.41 |
1.21 |
1.09 |
| Exhaust NOx |
1.83 |
1.81 |
1.72 |
1.62 |
1.54 |
1.43 |
1.32 |
1.11 |
0.85 |
0.69 |
| Light trucks |
| Exhaust HC |
1.59 |
1.02 |
0.88 |
0.96 |
0.97 |
0.98 |
0.80 |
0.79 |
0.63 |
0.55 |
| Exhaust CO |
2.67 |
1.77 |
1.54 |
1.66 |
1.68 |
1.68 |
1.37 |
1.34 |
1.06 |
0.93 |
| Exhaust NOx |
2.71 |
1.76 |
1.64 |
1.67 |
1.66 |
1.59 |
1.37 |
1.30 |
1.09 |
0.94 |
| Heavy trucks |
| Exhaust HC |
2.21 |
0.79 |
0.74 |
0.69 |
0.61 |
0.58 |
0.54 |
0.51 |
0.48 |
0.45 |
| Exhaust CO |
10.06 |
4.10 |
3.82 |
3.58 |
3.37 |
3.19 |
3.05 |
2.90 |
2.66 |
2.31 |
| Exhaust NOx |
23.34 |
18.05 |
16.68 |
15.52 |
13.92 |
12.50 |
11.45 |
10.55 |
9.60 |
8.61 |
Key: CO = carbon monoxide; HC = hydrocarbon; NOx = nitrogen oxides; RFG = reformulated gasoline.
Source:
U.S. Environmental Protection Agency, National Vehicle and Fuel Emissions Laboratory, MOBILE6.2.3 model, personal communication, July 6, 2009.
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