A quantitative analysis of the effect of expressway network expansion on National Economy and Land Structure

Abstract

In this study, we estimated the effect of constructing new expressway on macroeconomy and tinter-regional distribution of population and production in Japan by using an existing simulation model with some improvements. The result showed that constructing new expressways contributes to the Real GDP growth. On the other hand, in the scenarios of “nation-wide construction” and “Kanto-area construction”, the population and production were concentrated more in Kanto Area and local areas declined. But in the scenario of “other-than-Kanto-area constrution”, the population and production were dispersed compared to before the construction.. But the effect was not so big and it suggests that other scenarios which make the population and economy dispersed more.