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Building new roads really does create extra traffic: a response to Prakash et al.

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Abstract:

A recent article by Prakash et al. (Applied Economics, 33, 1579-85, 2001) asserted that induced travel effects do not occur. This paper is criticized on several grounds. It disregards much of the recent work in this area that has empirically estimated induced travel relationships. The models specified are inappropriate for properly addressing this question, both in their use of road expenditure data (based on a misunderstanding of how this may relate to traffic growth) and specification of a model that does not account for other variables that generally have a large effect on traffic growth (notably population and income growth). The evidence in the literature is summarized and an analysis of UK road expenditure data shows that expenditure is not a good measure of actual road capacity that is built.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/0003684032000089872

Affiliations: 1: Centre for Transport Studies, University College London, Gower Street, London WC1E 6BT, UK 2: Centre for Transport Studies, Dept. of Civil and Environmental Engineering, Imperial College of Science, Technology & Medicine, London SW7 2BU, UK

Publication date: September 10, 2003

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