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Transport user benefits calculation with the “Rule of a Half” for travel demand models with constraints

Winkler, Christian (2015) Transport user benefits calculation with the “Rule of a Half” for travel demand models with constraints. Research in Transportation Economics (49), pp. 36-42. Elsevier. DOI: 10.1016/j.retrec.2015.04.004 ISSN 0739-8859

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Abstract

The importance of user benefits in transport projects assessments is well-known by transport planners and economists. Generally they have the greatest impact on the result of cost-benefit analysis. It is common practice to adopt the consumer surplus measure for calculating transport user benefits. Normally the well-known “Rule of a Half”, as a practical approximation for the integral of the demand curve, is used to determine the change of consumer surplus. Changes in travel demand and consumer surplus are influenced by all modeled changing variables, which primarily comprise the generalized costs. However, travel demand models with multiple constraints additionally contain variable “shadow prices”, added to the generalized costs. Such models are often used for travel demand modeling of large-scale areas. The most discussed and well-known model in the field of transport modeling is the doubly constrained gravity model. Beside this model with inelastic constraints, there are also more flexible models with elastic constraints. In this paper we enter into the question of whether applying the Rule of a Half with regard only to the generalized costs and neglecting the shadow prices is valid in the case of travel demand models with multiple constraints. For this purpose, a theoretical analysis in this paper provides a mathematical proof.

Item URL in elib:https://elib.dlr.de/96638/
Document Type:Article
Title:Transport user benefits calculation with the “Rule of a Half” for travel demand models with constraints
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Winkler, Christianchristian.winkler (at) dlr.deUNSPECIFIED
Date:June 2015
Journal or Publication Title:Research in Transportation Economics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.retrec.2015.04.004
Page Range:pp. 36-42
Publisher:Elsevier
ISSN:0739-8859
Status:Published
Keywords:consumer surplus, Rule of a Half, travel demand model, multinomial logit model, constraints
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 > Passenger Transport
Deposited By: Winkler, Dr.-Ing. Christian
Deposited On:30 Jun 2015 13:13
Last Modified:30 Jun 2015 13:13

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