Office of Operations Freight Management and Operations
back

Freight Facts and Figures 2012

Table 5-12. Estimated National Average Vehicle Emissions Rates of Heavy-Duty and Light-Duty Vehicles: 1999-2011 (Historical)

Table in Excel format

Grams per mile

Blank cell. 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Gasoline
Cars
Exhaust HC 0.93 0.82 0.72 0.66 0.60 0.51 0.45 0.40 0.36 0.33 0.29 0.27 0.24 0.21
Nonexhaust HC 0.67 0.61 0.56 0.51 0.46 0.42 0.38 0.34 0.31 0.27 0.25 0.22 0.19 0.17
Total HC 1.60 1.43 1.28 1.16 1.06 0.93 0.82 0.75 0.67 0.60 0.54 0.48 0.43 0.37
Exhaust CO 16.23 14.31 12.62 11.39 10.35 8.96 7.83 7.08 6.41 5.83 5.20 4.78 4.39 3.93
Exhaust NOx 2.04 1.90 1.79 1.65 1.53 1.34 1.17 1.08 0.99 0.89 0.79 0.72 0.64 0.54
Light trucks
Exhaust HC 1.30 1.22 1.15 1.10 1.07 0.96 0.89 0.83 0.78 0.75 0.70 0.66 0.61 0.56
Nonexhaust HC 0.67 0.63 0.60 0.56 0.52 0.48 0.44 0.41 0.38 0.37 0.35 0.33 0.31 0.29
Total HC 1.96 1.85 1.75 1.66 1.59 1.44 1.33 1.23 1.16 1.11 1.05 0.99 0.92 0.86
Exhaust CO 23.96 22.21 20.73 19.42 18.30 16.31 14.95 13.79 12.94 12.36 11.53 10.86 10.21 9.43
Exhaust NOx 2.87 2.76 2.66 2.51 2.41 2.15 1.94 1.83 1.73 1.65 1.57 1.49 1.41 1.29
Heavy trucks
Exhaust HC 2.87 2.75 2.66 2.56 2.46 2.13 1.87 1.71 1.57 1.44 1.38 1.30 1.19 1.09
Nonexhaust HC 1.25 1.22 1.18 1.12 1.06 1.00 0.94 0.89 0.85 0.80 0.81 0.76 0.70 0.65
Total HC 4.12 3.97 3.85 3.68 3.52 3.12 2.81 2.60 2.42 2.24 2.19 2.06 1.89 1.74
Exhaust CO 64.48 62.88 61.96 60.43 58.95 52.44 47.27 43.73 40.81 38.02 37.26 35.27 32.95 30.67
Exhaust NOx 6.16 5.84 5.73 5.61 5.52 5.00 4.50 4.28 4.07 3.85 3.67 3.56 3.45 3.27
Diesel
Cars
Exhaust HC 0.26 0.26 0.24 0.22 0.19 0.17 0.16 0.13 0.11 0.09 0.08 0.08 0.07 0.07
Exhaust CO 1.13 1.14 1.03 0.90 0.78 0.67 0.57 0.52 0.49 0.46 0.45 0.54 0.63 0.72
Exhaust NOx 1.35 1.36 1.30 1.23 1.48 1.73 1.96 1.78 1.62 1.49 1.38 1.23 1.09 0.96
Light trucks
Exhaust HC 0.66 0.65 0.63 0.60 0.64 0.64 0.66 0.68 0.65 0.64 0.63 0.60 0.55 0.51
Exhaust CO 3.55 3.51 3.49 3.34 3.55 3.59 3.74 3.84 3.66 3.61 3.53 3.40 3.15 2.91
Exhaust NOx 6.16 6.04 5.89 5.82 5.82 5.82 5.83 5.71 5.39 5.16 4.96 4.62 4.26 3.92
Heavy trucks
Exhaust HC 1.05 1.06 1.07 1.09 1.12 1.12 1.10 1.07 1.01 0.96 0.94 0.92 0.86 0.81
Exhaust CO 4.55 4.59 4.67 4.79 4.89 4.84 4.64 4.42 4.10 3.85 3.72 3.57 3.28 3.02
Exhaust NOx 24.50 23.20 22.27 21.44 19.99 18.39 16.84 15.43 14.18 13.06 12.15 10.97 9.84 8.80

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

Notes: This table is based on MOVES2010b, 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 the 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, personal communication, October 25, 2013.

 

You may need the Microsoft Excel Viewer to view Excel files on this page.

back
Office of Operations