A description of a computer model of the spatial organization of human activities within a metropolitan area. The model is intended as a device for evaluating the impact on metropolitan form of public decisions concerning urban renewal, tax policies, land-use controls, and transportation investments; and for predicting the effects on metropolitan form, over time, of changes in such key variables as employment pattern, efficiency of the transportation system, and the growth of population. This model has been fitted to data for Pittsburgh.
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