Abstract
A benefit-cost model is presented for determining the optimal choice among alternative transportation systems--each an improvement of the basic transportation system which is postulated to be operational during a planning horizon of several years. Although the model is developed for travel between two cities, it can be extended to a full network of many cities. Each transportation system consists of several inter-city major transportation modes as well as intra-city feeder modes. Relative benefits and costs are considered for travellers, operating firms and the general public along selected attribute dimensions. Important variables include the expected demand for trips between the two cities, measures of value for each attribute and mode combination and various discounting and weighting parameters. A sensitivity analysis is suggested for testing the responsiveness of the evaluation model to individual and joint changes in these variables and parameters. The benefit cost model and sensitivity analysis are illustrated using an hypothetical example which involves two alternative changes to a basic system consisting of seven modes and four attribute dimensions over a planning horizon of 5 years. /Author/
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