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Title: Welfare evaluation with a road capacity constraint
Authors: Romilly, Peter
Affiliation: University of Abertay Dundee. Dundee Business School
Keywords: Traffic congestion
Issue Date: May-2004
Publisher: Elsevier Ltd.
Type: Journal Article
Refereed: peer-reviewed
Rights: Published version (c)Elsevier, available from DOI: doi:10.1016/j.tra.2003.12.001
Citation: Romilly, P. 2004. Welfare evaluation with a road capacity constraint. Transportation Research Part A: Policy and Practice. 38(4):pp.287-303 . [Online] Available from DOI : doi:10.1016/j.tra.2003.12.001
Abstract: Severe traffic congestion in and around many cities across the world has resulted in programmes of extensive road building and other capacity increasing projects. But traffic congestion has often not fallen in the long run and neither has journey speed increased. Demand for peak period road travel, particularly by car, has grown so strongly that increases in road capacity have been quickly matched by increased road use. This paper develops a model of a road network characterised by insatiable road passenger (car and bus) demand. The model parameters are calibrated on a typical urban road network, and a number of simulations conducted to determine social welfare after the introduction of a road capacity constraint into the optimisation process. The empirical results have an important policy implication for the evaluation of projects that increase road capacity, namely that standard methods of cost-benefit analysis may tend to overestimate the net benefits of such projects by a significant amount. Although the model is developed in the context of roads and road traffic congestion, it could also be applied to air travel.
URI: http://hdl.handle.net/10373/312
ISSN: 0965-8564
Appears in Collections:Dundee Business School Collection

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