This report examines the performance of the source strength model presented in the U.S. Environmental Protection Agency publication AP-42, Supplement 5 relative to field data gathered during the AIRPOL project and relative to the previous source strength model, AP-42, Supplement 2. The report demonstrates that the Supplement 5 model can be expected to produce "worst case" emission estimates on the order of 1.6 to 2.1 times those of Supplement 2 for typical Virginia applications. Since it appears that Virginia will be required to implement the Supplement 5 model, it is recommended that (1) operation phase input data be accurately determined on a project-by-project basis, (2) "worst case" type analyses be realistically conceived, and (3) the Department request that the FHWA and EPA justify the twofold increase in emission estimates of Supplement 5 over Supplement 2.
The subject of this report is an air quality prediction model for highways, AIRPOL Version 2, July 1973. AIRPOL has been developed by modifying the ba...
This primer presents a brief state-of-the art review of motor vehicle air pollution. Its purpose is to aid highway personnel in understanding the natu...
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United States Department of Transportation
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