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Title: Evaluating Transport User Benefits: Adjustment of Logsum Difference for Constrained Travel Demand Models
Accession Number: 01594810
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Transport user benefits are of great importance in cost–benefit analysis when transport projects are appraised. Generally, these benefits have the greatest effect on the results of cost–benefit analyses. It is common to adopt the consumer surplus for calculating transport user benefits. The consumer surplus measure is based on the underlying demand model and follows from the integration of the demand curve. If the popular logit model is used for forecasting travel demand, a consumer surplus measure takes a closed form that is easy to calculate. Furthermore, in cost–benefit analyses the change in consumer surplus between an initial and final state is needed; the change can be easily derived by the difference of the logsums of the two states. This logsum approach is proven and correct for travel demand models based on the logit model without multiple constraints. However, for travel demand models dealing with two or more sets of constraints, the logsum approach fails. In this paper, a mathematical approach is described for a transport user benefits measure that corresponds to the consumer surplus and is universal for all travel demand models with constraints. The measure for a doubly constrained trip distribution is derived. The applicability of the derived approach is shown by a simple example.
Monograph Title: Monograph Accession #: 01624690
Report/Paper Numbers: 16-1879
Language: English
Authors: Winkler, ChristianPagination: pp 118–126
Publication Date: 2016
ISBN: 9780309441452
Media Type: Print
Features: References
(25)
; Tables
(5)
TRT Terms: Subject Areas: Economics; Highways; Operations and Traffic Management; Planning and Forecasting
Files: TRIS, TRB, ATRI
Created Date: Jan 12 2016 4:49PM
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