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A GIS-BASED MODAL MODEL OF AUTOMOBILE EXHAUST EMISSIONS (EPA/600/R-98/097)
Citation:
Bachman, W. H. A GIS-BASED MODAL MODEL OF AUTOMOBILE EXHAUST EMISSIONS (EPA/600/R-98/097). U.S. Environmental Protection Agency, Washington, D.C., 1998.
Description:
The report presents progress toward the development of a computer tool called MEASURE, the Mobile Emission Assessment System for Urban and Regional Evaluation. The tool works toward a goal of providing researchers and planners with a way to assess new mobile emission mitigation strategies. The model is based on a geographic information system (GIS) and uses modal emission rates, varying emissions according to vehicle technologies and modal operation (acceleration, deceleration, cruise, and idle). Estimates of spatially resolved fleet composition and activity are combined with situation-specific emission rates to predict engine start and running exhaust emissions. The estimates are provided at user-defined spatial scales. A demonstration of model operation is provided using a 100 sq km study area in Atlanta, Georgia. Future mobile emissions modeling research needs are developed from an analysis of the sources of model error.