Nigel H.M. Wilson1.201, Fall 20062 Lecture 12Introduction to Analysis Approach•Basic approach is to establish an aggregate total cost function including:•operator cost as f(design parameters)•user cost as g(design parameters)•Minimize total cost function to determine optimal design parameter (s.t. constraints)Variants include:•Maximize service quality s.t. budget constraint•Maximize consumer surplus s.t. budget constraintTotal CostUser CosthOPTHeadwayOperator CostCost
Nigel H.M. Wilson1.201, Fall 20063Lecture 12Bus Frequency Model:the Square Root ModelProblem: define bus service frequency on a route as a function of ridershipTotal Cost = operator cost + user cost
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