A model of metropolis

Abstract

This report describes a computer model of the spatial organization of human activities within a metropolitan area. The model is intended for eventual use as 1) a device for evaluating the impact of public decisions (e.g., concerning urban renewal, tax policies, land-use controls, transportation investments) on metropolitan form; and 2) a device for predicting changes in metropolitan form which will follow over time as a consequence of currently visible or anticipated changes in key variables such as the pattern of 'basic' employment, the efficiency of the transportation system, or the growth of population. The development of the model to the stage at which it becomes a practical tool for planning and decision-making will require more time and effort. The first-generation model described in this report has been fitted to data for Pittsburgh, Pennsylvania, and enough experimental computer-runs have been completed to allow an appraisal of the practicability of my approach, and to indicate the strong and weak points of the model and also of the available data. The findings reported here offer guidance both to the development of a second-generation model and to data-collection programs. (Author)

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