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Evaluating Transport User Benefits - Adjustment of Logsum Difference for Constrained Travel Demand Models

Winkler, Christian (2016) Evaluating Transport User Benefits - Adjustment of Logsum Difference for Constrained Travel Demand Models. Transportation Research Record: Journal of the Transportation Research Board, 2564, pp. 118-126. US National Research Council. ISSN 0361-1981

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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.

Item URL in elib:https://elib.dlr.de/110367/
Document Type:Article
Title:Evaluating Transport User Benefits - Adjustment of Logsum Difference for Constrained Travel Demand Models
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Winkler, ChristianChristian.Winkler (at) dlr.deUNSPECIFIED
Date:December 2016
Journal or Publication Title:Transportation Research Record: Journal of the Transportation Research Board
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:2564
Page Range:pp. 118-126
Publisher:US National Research Council
ISSN:0361-1981
Status:Published
Keywords:cost-benefit Analysis, travel demand model, logsum, logit model
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Verkehrsentwicklung und Umwelt II (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Transport Research
Institute of Transport Research > Passenger Transport
Deposited By: Winkler, Dr.-Ing. Christian
Deposited On:11 Jan 2017 10:12
Last Modified:08 Mar 2018 18:52

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