Regional Planning Models Used in Subarea Windowsby Richard E. Walker, Metropolitan Service District, Portland, OR, USA,
Abstract: The typical regional travel-forecasting model has historically been confined to use on a mainframe computer. In an effort to reduce costs and allow computer hardware options, a three-tiered windowing concept was developed by the Metropolitan Service District. The underlying zone system, the travel demand subarea, and the specific site subarea have provided a tool to obtain very detailed trip table and assignment data at a cost much less than previous methods. Since the amount of data being processed has been reduced, the travel-forecasting model was able to be converted from a mainframe environment to a super-microcomputer. This paper discusses the development and implementation of the subarea modeling strategy in Portland, Oregon.
Subject Headings: Windows | Computer models | Travel modes | Data processing | Computer software | Travel demand | Urban areas | Architecture | Oregon
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