TRB Pubsindex
Text Size:

Title:

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

Accession Number:

01594810

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Find a library where document is available


Order URL: http://worldcat.org/isbn/9780309441452

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 Accession #:

01624690

Report/Paper Numbers:

16-1879

Language:

English

Authors:

Winkler, Christian

Pagination:

pp 118–126

Publication Date:

2016

Serial:

Transportation Research Record: Journal of the Transportation Research Board

Issue Number: 2564
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

9780309441452

Media Type:

Print

Features:

References (25) ; Tables (5)

Subject Areas:

Economics; Highways; Operations and Traffic Management; Planning and Forecasting

Files:

TRIS, TRB, ATRI

Created Date:

Jan 12 2016 4:49PM

More Articles from this Serial Issue: