臺鐵推擠延滯改善策略之研究

STRATEGIES FOR ALLEVIATING SECONDARY TRAIN DELAYS IN TAIWAN RAILWAY SYSTEMS

臺鐵同時提供城際運輸與區域運輸服務，然這兩種運輸服務停站模式與服務乘客屬性有所不同。而在路線容量的限制下，可能會產生不同的衝突類型，進而產生不同之調度策略。臺鐵因運轉餘裕低，當列車營運一旦遇隨機之擾動，延滯因此遞延至後續列車，是謂推擠延滯。為有效改善臺鐵營運之推擠延滯，本研究首先瞭解臺鐵調度專家目前對於擾動考量之調度規則與策略，並利用派翠網路分析法進行情境模擬，模擬結果發現縮短閉塞區間對臺鐵區間列車待避城際列車的推擠延滯有極顯著之助益，惟需注意是否有合適待避線或通過線，以避免降低縮短閉塞區間長度效益。後續研究也建議未來臺鐵將旅客轉乘之需求與經轉轍器耗時對於推擠延滯的影響加以分析，以作為後續調度改善策略與設備建置之考量。

Taiwan Railway Administration (TRA) provides both intercity transportation and regional transportation services. However, these two transportation service stopping patterns and passenger service attributes are different. Under the limitation of line capacity, different types of conflicts may occur, resulting in different corresponding rescheduling strategies. Due to the low operating margin, once the train operation encounters disturbances, the delay could be spread to the subsequent trains, which is called secondary delay. In order to reduce the secondary delay, this study firstly understands the dispatching rules and strategies of the dispatching experts for the disturbance, and uses the Petri Nets method to simulate the various scenarios. Petri Nets simulations show that shortening the block interval is of great help to the secondary delay improvement. It is essential to reserve suitable lines to avoid or pass through, so as to avoid reducing the benefit of shortening the length of the block interval. Future research suggests that TRA can analyze the impact of passenger transfer demand and time-consuming of switch on secondary delay for subsequent rescheduling improvement strategies.