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Multi-Pollutant Emissions Benefits of Transportation Strategies-FHWA

Appendix B: Summary of the Contribution of Transportation and Motor Vehicles to National Emissions of Each Pollutant

Contribution of Emissions by Vehicle Classisifcation Compared to Total Stationary and Mobile Sources (Thousand Short Tons, 2002)

Source of Category

NOx

CO

VOC

NH3

SO2

PM10

PM2.5

TOTAL ALL SOURCES 21,102   112,049   16,544   3,712   15,353   22, 54   6,803  
MOBILE SOURCES TOTAL 11, 451 54.26% 86, 611 77.30% 7, 231 43.71% 290 7.81% 696 4.53% 515 2.32% 434 6.38%
HIGHWAY VEHICLES 7, 365 34.90% 62,161 55.48% 4,543 27.46% 287 7.73% 275 1.79% 204 0.92% 149 2.19%
Light-Duty Gas Vehicles & Motorcycles 2, 166 10.26% 34, 400 30.70% 2, 496 15.09% 184 4.96% 93 0.61% 52 0.23% 27 0.40%
Light-Duty Gas Trucks 1, 401 6.64% 24, 191 21.59% 1, 638 9.90% 92 2.48% 65 0.42% 30 0.14% 16 0.24%
Heavy-Duty Gas Vehicles 404 1.91% 2, 554 2.28% 201 1.21% 4 0.11% 12 0.08% 9 0.04% 7 0.10%
Diesels 3,395 16.09% 1, 016 0.91% 208 1.26% 6 0.16% 105 0.68% 113 0.51% 99 1.45%
OFF-HIGHWAY 4, 086 19.36% 24, 450 21.82% 2, 688 16.25% 3 0.08% 420 2.74% 311 1.40% 285 4.19%
Non-Road Gasoline 211 1.00% 21, 940 19.58% 2, 342 14.16% 1 0.03% 8 0.05% 72 0.32% 67 0.98%
Non-Road Diesel 1, 600 7.58% 872 0.78% 188 1.14% 2 0.05% 198 1.29% 169 0.76% 155 2.28%
Aircraft 81 0.38% 257 0.23% 21 0.13% NA   8 0.05% 3 0.01% 2 0.03%
Marine Vessels 1, 011 4.79% 133 0.12% 32 0.19% NA   160 1.04% 44 0.20% 40 0.59%
Railroads 889 4.21% 88 0.08% 35 0.21% NA   47 0.31% 22 0.10% 20 0.29%
Other 295 1.40% 1, 160 1.04% 71 0.43% 0   0 0.00% 1 0.00% 1 0.01%
ROAD DUST NA NA NA NA NA NA NA NA NA NA 3,951 17.83% 694 10.05%

Source: National Emissions Inventory Air Pollutant Emissions Trends Data, http://www.epa.gov/ttn/chief/trends/index.html#tables

Updated: 07/06/2011
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