The evaluation of transportation projects in Korea is conducted in accordance with the “Preliminary Feasibility Study Guidelines for the Road and Rail Sectors”(KDI), without reflecting the impact on regional communities and economic revitalization. Internationally, there is a growing effort to promote urban regeneration projects aimed at revitalizing infrastructure and urban activities in surrounding areas through new transportation projects. Therefore, this study aims to establish a methodology for measuring the ripple effects of transportation projects in Seoul by analyzing the effects of existing transportation projects using various urban data and proposing a system for continuous monitoring and diagnosis.
To select analysis indicators, expert surveys were conducted to assess the effectiveness and ease of measurement of the indicators. As a result, 22 indicators were reviewed, including seven social sector indicators, seven land use value indicators, and eight industrial and economic indicators.
Using the selected indicators, an analysis of the ripple effects was conducted on the Sillim Line, which opened in May 2022. The critical distance of the subway station’s impact was estimated to range from a minimum of 250m to a maximum of 950m. This slightly exceeds the conventional 500m station area, indicating that the ripple effects of light rail transit extend more broadly than initially anticipated.
The comprehensive evaluation of the extensive ripple effects of transportation projects showed significant impacts. This study confirmed the need to continuously collect data to analyze the influence of transportation facilities on local consumption activities and land use. In particular, it is necessary to assess the multifaceted impact of transportation projects on Seoul and feed this into the transportation project planning stages to strengthen the foundation for implementation. To achieve this, it is essential to establish a transportation infrastructure monitoring system and enhance data collection. Based on the data collected, an integrated analysis system will be developed to forecast demand and analyze the ripple effects of transportation projects.