Discovering relation of railway route and national economy using statistical and remotely sensed dataset

摘要

This study aims to find out the role of highways on economy in the surrounding areas in Japan. Even Among various transportations, focusing on highway network is important in most countries, because government invest a lot money on construct the infrastructure. To evaluate investment of governments on transport infrastructure cost effectiveness, investigating the impact of highways on economies to the surrounding area is necessary. Many researches were carried out to investigate the effect of highways on economy of city or on national economy using variety of methods. Difference in Difference analysis (DID) were to exclude endogenous effect without limiting our study area. Target cities spread around all over in Japan, and highway cities were defined as cities in which highways were firstly constructed in 1980s. Depending on the location of highway, cities were labeled as highway cities, adjacent cities, and control cities. DID analysis was carried out with highway cities and control cities, adjacent cities and control cities to investigate the impact of highways on those areas. Several economic valuables including industry-based valuables were used for before and after comparison of construction. Here, four different time periods were selected to demonstrate the situation after construction for time-series analysis. The results show that the impact of highway on industries except for agriculture increases as longer time passes in highway cities, while highway construction has a negative impact on adjacent cities. More analysis using DTM to estimate a reasonable construction cost will be necessary for cost-benefit analysis for highway construction. As a future analysis, railway impact on economy will be studied to compare with the result of highways.