MOBILE6 A Revised Model for Estimation of Highway Vehicle Emissions

摘要

The Environmental Protection Agency (EPA) highway vehicle emission factor model provides average in-use fleet emission factors for three criteria pollutants [volatile organic compounds (VOC), a precursor of ground-level ozone; carbon monoxide (CO); and oxides of nitrogen (NOx)], for gas and diesel cars and light- and heavy-duty trucks, and motorcycles, for calendar years between 1970 and 2050, under various conditions affecting in-use emission levels (e.g., ambient temperatures, average traffic speeds) as specified by the modeler. It is used by EPA in evaluating highway mobile source control strategies, by States (except California) and local and regional planning agencies in developing emission inventories and control strategies for State Implementation Plans (SIPs) under the Clean Air Act, and in the development of environmental impact statements. EPA is now in the process of revising the MOBILE model. MOBILE6, currently scheduled for release in December 1999, will differ significantly in both structure and data requirements from current versions of the model (MOBILE5a and 5b). MOBILE6 will incorporate updated basic emission rates, off-cycle ("real world") driving patterns and emissions, separation of start and running emissions, improved correction factors, and updated fleet information. It will also include impacts of recently promulgated regulations not included in MOBILE5a, and will provide improved input and output features.