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UCOST is a software system that has been developed for use by planners in estimating the cost of proposed mass transportation systems. The models in UCOST represent an unusual micro approach to a planning problem. To derive its cost estimates, UCOST finds feasible vehicle schedules and an accurate estimate of crew requirements over the day for the proposed multi-modal transit system. The procedures in UCOST differ from the usual macro approach of costing transit systems which are based on simple characteristics of the proposed transit system such as vehicle in-service hours. Through the development of fast computational procedures such a micro approach is possible. UCOST is being implemented within the Urban Transportation Planning System, a computer package for transportation planners developed by the Urban Mass Transportation Administration. A description of the procedures in UCOST and its implementation is presented.
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