시뮬레이션 모델 기반 회차시간 분석

초록

This study introduces the concept of line turn-back time, which expands the spatial scope from the conventional terminal station-based turn-back time to the entire railway line. Methodologically, a simulation-based approach was employed instead of traditional analytical analysis. The results show that, unlike analytical methods based on terminal stations, the simulation-based line turn-back time increases as the number of trains grows, due to operational delays caused by conflicts between arriving and departing trains at turn-back tracks and terminal stations. In the experiment, when the headway was set to 3 minutes, the calculated line turn-back time increased by approximately 126% compared to the terminal station-based turn-back time, and the difference between the two methods became even greater as the headway was reduced to 1 minute. Therefore, the proposed methodology provides a more realistic estimation of turn-back time by considering train conflicts and delayed departures. Finally, alternative scenarios were analyzed to minimize line turn-back time and headway by reducing train length and adding turn-back infrastructure such as crossovers, turn-back tracks, and platforms.

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