Estimation of Social Costs of Transportation in Japan (Revised Version)

概要

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Using a data set of 111 Japanese cities from the year 2005, we aim in this paper to estimate the social costs of car transport and to analyze the structure of the components of and the relationship between social costs and city size. We obtain the following major results. First, the social costs of vehicular transport increase at an accelerated pace as city size becomes larger. Second, while the construction of roads does not work to decrease the social costs of vehicular transport, public transportation has a tendency to decrease such costs, though with minimal effect. Third, the traffic congestion component represents more than 45% of the total social cost of vehicular transport. Cost due to global warming accounts for 5 to 11% of the total. Fourth, the social costs of vehicular transport are about 8.0% of GDP. Fuel tax for car transport in Japan covers only 16.3% of the social costs of regular car use.
神戸大学大学院経営学研究科の論文