Determinants of Transportation Mode Choice for Long-distance Travel in Korea -Focused on High-speed Rail over Private Car

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This study focuses on the factors that determine a user’s choice between traveling by high-speed rail and private automobile when engaging in long-distance travel in Korea. Concerns over greenhouse gas emissions and congestion caused by excessive automobile use have drawn attention to the need for policies that encourage public transportation use. Increasing high-speed rail use can reduce the negative effects of excessive automobile use. Few studies, however, have empirically examined the factors that influence a user’s choice between high-speed rail and private automobile for long-distance travel. This study identifies the factors in Korea that influence a user’s choice between high-speed rail and private car for their commute, as well as for business and leisure travel. This study employs binomial logit models that use explanatory variables such as a user’s travel, personal and household characteristics, and especially built environment variables. The analysis results demonstrate that although the determinants of transportation mode choice depend on the purpose of the long-distance trip, a destination’s population density is generally an important factor regardless of travel purpose. However, an origin’s population density is not significant except with regard to leisure travel. These findings indicate that land use policies within the proximity of high-speed rail stations should address population density in order to reduce an inordinate dependence on automobiles for long-distance travel