명시선호실험과 현시선호자료를 이용한 대도시권 지하철역세권 설정 연구

Abstract

To the traditional concept of TOD this research investigates a possibility to increase potential transit riders by applying connecting modes at trip end such as feeder bus and taxi. Such modes can also bring the residents living not in a walkable distance to the transit facilities. This additional concept is necessary particularly in the areas, which are located in the outskirts of a large city like Seoul. For this purpose the research accomplished two main tasks. First, the maximum accessing time to a subway station using the modes and the relationship between accessing time and subway ridership was investigated using revealed preference survey from 500 respondents of six sample areas in Seoul, Korea. Secondly, the research estimated the elasticities of travel time and cost to connecting modes, using a conjoint analysis based on the stated preference survey from the same respondents. From the results the actual spatial extent of subway catchment areas can be defined; the subway catchment areas using feeder buses were three or four times larger than those by walk. At the same time reducing travel time and cost for connecting modes can also cause the increase of subway ridership. The choice model of trip-end modes confirmed that enhancing the conditions for pedestrians can also promote the usage of the subway. The results of the research can be applied not only for the policies of TOD but also for the evaluation of sustainable transport polices such as traffic calming and new bus lines in terms of the subway ridership.