The value of travel time savings in evaluation

P.J. Mackie, Sergio Jara-Diaz () and A.S. Fowkes

Transportation Research Part E: Logistics and Transportation Review, vol. 37, issue 2-3, 91-106

Abstract: Values of travel time enter the appraisal scheme both as values for modelling and forecasting and as values for use within project evaluation. This paper considers whether and how travel time values should be used within evaluation. The basic theories of private and social travel time valuation are set out. Issues such as the valuation of working time savings, the case for segmenting values by journey purpose and length, sign and size of time savings and mode of travel, and the income elasticity of the value of time, are reviewed. Two of the main conclusions are that time is a scarce resource and should be valued but that direct use of willingness to pay values is inappropriate for social appraisal of projects. Some form of social weighting scheme is required.

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