Simplified Methodology to Estimate Emissions from Mobile Sources for Ambient Air Quality Assessment

Abstract

Vehicle emissions from mobile sources are major contributors to air pollution and air quality degradation in the United States. The inventory of these emissions is a key component in ambient air quality assessment and air pollution abatement strategies. Procedures for preparing the mobile source emission inventory require complex data processing and calculations. This paper presents a simplified methodology for estimating vehicle emissions based on key parameters of vehicle model year, average vehicle speed, and air temperature, which have major effects on emission rates. Simplified multiple linear regression equations are developed from a database of the EPA’s MOBILE6 computations to calculate emission factors. The coefficient of determination