lect12 - MACRO DESIGN MODELS FOR A SINGLE ROUTE Outline 1....

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Nigel H.M. Wilson 1.201, Fall 2006 1 Lecture 12 MACRO DESIGN MODELS FOR A SINGLE ROUTE Outline 1. Introduction to analysis approach 2. Bus frequency model 3. Stop/station spacing model
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Nigel H.M. Wilson 1.201, Fall 2006 2 Lecture 12 Introduction 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 constraint Total Cost User Cost h OPT Headway Operator Cost Cost
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Nigel H.M. Wilson 1.201, Fall 2006 3 Lecture 12 Bus Frequency Model: the Square Root Model Problem: define bus service frequency on a route as a function of ridership Total Cost = operator cost + user cost
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Nigel H.M. Wilson 1.201, Fall 2006 4 Lecture 12 Square Root Model (cont’d) This is the Square Rule with the following implications: high frequency is appropriate where (cost of wait time/cost of operations time) is high frequency is proportional to the square root of
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This note was uploaded on 12/04/2011 for the course ESD 1.210j taught by Professor Mosheben-akiva during the Fall '08 term at MIT.

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lect12 - MACRO DESIGN MODELS FOR A SINGLE ROUTE Outline 1....

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