A model for the dispersion of particulate or gaseous pollutants from a network of streets and highways

Abstract A mathematical model has been developed for predicting the atmospheric transport of particulates of any size distribution and of gaseous pollutants. The sources are finite length line segments representing a network of city streets and rural highways. The model can be used to predict the dispersion of pollutants in any region of flat terrain. The inputs required for the model are the coordinates of the highway segments, traffic counts, and meteorological conditions. The model has been used to estimate the distribution, in the vicinity of Urbana-Champaign, Illinois, of lead emitted from automobiles. The region has an area of 168 sq. miles and includes both rural and urban sources. The model is used to interpret results of a sampling program in a following paper.

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