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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Table 6-11 Estimated National Average Vehicle Emissions Rates: 2000, 2010, 2014, and 2015

Wednesday, January 6, 2016

Excel

(grams per mile)

  2000 2010 2014 2015
Gasoline
Cars        
Exhaust HC 0.93 0.41 0.28 0.25
Nonexhaust HC 0.37 0.21 0.16 0.15
Total HC 1.30 0.62 0.44 0.40
Exhaust CO 13.06 5.54 4.14 3.82
Exhaust NOx 1.64 0.87 0.57 0.50
Light trucks1        
Exhaust HC 0.86 0.62 0.45 0.39
Nonexhaust HC 0.20 0.14 0.12 0.11
Total HC 1.06 0.77 0.56 0.50
Exhaust CO 14.10 9.06 6.76 6.10
Exhaust NOx 2.22 1.39 0.97 0.84
Heavy trucks2        
Exhaust HC 1.96 1.29 0.95 0.85
Nonexhaust HC 0.41 0.34 0.30 0.29
Total HC 2.37 1.62 1.25 1.14
Exhaust CO 53.97 36.70 28.28 25.78
Exhaust NOx 6.27 4.30 3.08 2.76
Diesel
Cars        
Exhaust HC 2.80 0.89 0.24 0.20
Exhaust CO 42.42 12.11 3.25 2.75
Exhaust NOx 2.82 0.97 0.31 0.24
Light trucks1        
Exhaust HC 0.75 0.70 0.46 0.41
Exhaust CO 8.72 5.74 3.68 3.22
Exhaust NOx 4.16 2.81 1.93 1.72
Heavy trucks2        
Exhaust HC 1.13 1.02 0.78 0.73
Exhaust CO 4.77 3.84 2.80 2.57
Exhaust NOx 24.83 12.84 10.04 9.15

KEY: CO = carbon monoxide; HC = hydrocarbon; NOx = nitrogen oxides.

1Includes pick-up trucks, sport-utility vehicles, and minivans with a gross vehicle weight rating up to 8,500 pounds.

2Includes trucks with a gross vehicle weight rating over 8,500 pounds.

NOTES: This table is based on MOVES2013, the latest highway vehicle emissions factor model from the U.S. Environmental Protection Agency. Similar tables in previous editions of Freight Facts and Figures were based on earlier models. Thus, the data in this table should not be compared to those in previous editions.

SOURCE: U.S. Environmental Protection Agency, National Vehicle and Fuel Emissions Laboratory, special tabulation, August 2015.