ABSTRACT
Urbana, IL, USA). Environ. Monitor. Assess. 1983, 3(1), pp. 1-12. The United States Clean Air Act Amendments of 1977 require that all non-attainment metropolitan areas evaluate the potential of transportation controls in meeting 1982 National Ambient Air Quality Standards. Many of these controls are designed to impact on mobile source emissions by altering vehicular speed. Discusses differences in results obtained by two alternative methods for estimating the same area’s mobile source emissions. The findings suggest that alternative zonal speed aggregation procedures can lead to widely diverging emission estimates.
