โ Scribed by Tschangho John Kim; Niranjian G. Hoskote
No coin nor oath required. For personal study only.
In the United States, the 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.
The paper 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. The paper further discusses the inherent assumptions in the aggregation procedures and the potential consequences of their uses in transportation planning for air quality controls.
* Link is defined as the transportation system element connecting two adjacent nodes. A node is a point on a transportation system where a trip maker can choose between a number of path alternatives.
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