On-Road Mobile Source Emissions Factors
  Running Exhaust Start-Up Start-Up Hot Soak Diurnal Start-Up
  CO ROG NOx SOx PM10 CO ROG ROG ROG NOx
Vehicle Type g/mile g/mile g/mile g/mile g/mile g/trip g/trip g/trip g/trip g/trip
Light-Duty Trucks - Cat 3.24 0.16 0.72 0.01 0.04 45.7 4.08 0.62 18.96 2.42
Heavy Heavy Duty Diesel Truck 7.2 1.22 9.2 0.32 0.72 0 0 0 0 0
Estimated Vehicle Emissions
Annual Average
  Average VMT/trip Total VMT Starts CO ROG NOx SOx PM10  
Vehicle Type worker/day mi/trip mi/day No.Day lb/year lb/day lb/day lb/day lb/day  
Light-Duty Trucks - Cat 637717.5 15 9565763 1275435 196826.389 69833.603 21988.319 210.885 843.542  
Heavy Heavy Duty Diesel Truck 212572.5 15 3188588 425145 50612.500 8576.007 64671.528 2249.444 5061.250  
Total Off-Site     12754350   123.719 39.205 43.330 1.230 2.952 Tons/year
Halloween
  Average VMT/trip Total VMT Starts CO ROG NOx SOx PM10
Vehicle Type worker/day mi/trip mi/day No.Day lb/day lb/day lb/day lb/day lb/day
Light-Duty Trucks - Cat 12,054 15 180812.3 24108.3 3720.417 1319.996 415.624 3.986 15.945
Heavy Heavy Duty Diesel Truck 4,018 15 60270.75 8036.1 956.679 162.104 1222.423 42.519 95.668
Total Off-Site     241083   4677.095 1482.100 1638.046 46.505 111.613
Thanksgiving
  Average VMT/trip Total VMT Starts CO ROG NOx SOx PM10
Vehicle Type worker/day mi/trip mi/day No.Day lb/day lb/day lb/day lb/day lb/day
Light-Duty Trucks - Cat 20,660 15 309895.9 41319.45 6376.458 2262.354 712.341 6.832 27.328
Heavy Heavy Duty Diesel Truck 6,887 15 103298.6 13773.15 1639.661 277.831 2095.122 72.874 163.966
Total Off-Site     413194.5   8016.119 2540.186 2807.464 79.706 191.294
New Year
  Average VMT/trip Total VMT Starts CO ROG NOx SOx PM10
Vehicle Type worker/day mi/trip mi/day No.Day lb/day lb/day lb/day lb/day lb/day
Light-Duty Trucks - Cat 13,779 15 206681.6 27557.55 4252.708 1508.852 475.088 4.556 18.226
Heavy Heavy Duty Diesel Truck 4,593 15 68893.88 9185.85 1093.554 185.297 1397.318 48.602 109.355
Total Off-Site     275575.5   5346.262 1694.149 1872.407 53.159 127.581
Martin Luther King's Birthday
  Average VMT/trip Total VMT Starts CO ROG NOx SOx PM10
Vehicle Type worker/day mi/trip mi/day No.Day lb/day lb/day lb/day lb/day lb/day
Light-Duty Trucks - Cat 8,606 15 129083.6 17211.15 2656.042 942.358 296.718 2.846 11.383
Heavy Heavy Duty Diesel Truck 2,869 15 43027.88 5737.05 682.982 115.728 872.699 30.355 68.298
Total Off-Site     172111.5   3339.024 1058.086 1169.417 33.201 79.681
President's Day
  Average VMT/trip Total VMT Starts CO ROG NOx SOx PM10
Vehicle Type worker/day mi/trip mi/day No.Day lb/day lb/day lb/day lb/day lb/day
Light-Duty Trucks - Cat 17,219 15 258288.8 34438.5 5314.583 1885.603 593.715 5.694 22.777
Heavy Heavy Duty Diesel Truck 5,740 15 86096.25 11479.5 1366.607 231.564 1746.220 60.738 136.661
Total Off-Site     344385   6681.190 2117.167 2339.935 66.432 159.438
Easter
  Average VMT/trip Total VMT Starts CO ROG NOx SOx PM10
Vehicle Type worker/day mi/trip mi/day No.Day lb/day lb/day lb/day lb/day lb/day
Light-Duty Trucks - Cat 13,779 15 206681.6 27557.55 4252.708 1508.852 475.088 4.556 18.226
Heavy Heavy Duty Diesel Truck 4,593 15 68893.88 9185.85 1093.554 185.297 1397.318 48.602 109.355
Total Off-Site     275575.5   5346.262 1694.149 1872.407 53.159 127.581
SOURCE:  CARB MVEI7G Program, 2001 South Coast Air Basin (summer), non-enhanced I/M, 35 mph
ASSUMPTIONS:
1 The hydrocarbon emission factors presented are Reactive Organic Gas (ROG) Efs. The ROG number is a  
combination of the ROG exhaust + running evaporative losses.
2 The PM10 emission factors are Total PM10 Efs.  The PM10 Efs include the exhaust PM + Tire
Wear PM + Brake Wear PM.
3 Emission factors from EMFAC7G (updated February 2000) were used.
4 All summertime emission factors were calculated at 75 F.
5 Emission factors assume 100% weighting to summertime fuel mix.
6 Emission factors include Running Exhaust, Running Evaporative Losses, and PM10 from tire wear and brake wear.
7 Sulfur oxide as SO2 emissions were calculated by converting the total daily SO2 mass into grams 
and then dividing by the total daily vehicle miles traveled.  The total daily SO2 and total daily vehicle miles traveled
were obtained from the BURDEN output for each modeled year.