수도권 GTX 노선 도입이 접근성 변화에 미치는 영향 분석 : GTFS 데이터를 활용하여

초록

Public transportation influences the mobility and convenience of urban residents, as well as urban structure. In this context, the introduction of new public transportation routes significantly affects traffic flow, accessibility, and urban structure. Accurately understanding and predicting these effects is crucial for efficiently operating and improving the transportation system. However, previous studies have relied solely on traditional statistical models based on in-vehicle time without considering first- and last-mile travel and transfer time. To address these limitations, this study develops a method to evaluate the impact of new public transportation routes in dense urban areas using General Transit Feed Specification (GTFS) data. GTFS data, which can be analyzed using Geographic Information System (GIS) technology, provides operational information about public transportation services, including time, location, and connectivity. It enables a more accurate and realistic analysis of the impact of new routes on a finer spatial scale. We conducted an accessibility assessment of the planned Great Train eXpress (GTX) route in the Seoul Metropolitan Area (SMA). Seoul was divided into a 500 m × 500 m grid, and accessibility improvements were calculated from the SMA to the centroids of these grids. The results showed a significant increase in accessibility across all of Seoul, with improvements of up to 40% from the SMA.

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