輕軌系統優先號誌及C型路權對道路車流之影響評估

Abstract

近年來，台灣的輕軌運輸系統陸續興建，如何依照各地區的條件因地制宜並有效管理輕軌運輸系統，將成為國內輕軌建設面臨的重要課題。而不同優先號誌策略及輕軌路權型式之採用，不僅會大幅影響輕軌系統的營運效率，更會對道路車流造成不同高低程度的影響。因此，本研究旨在評估輕軌系統優先號誌的選擇，以及Ｃ型路權的實施對道路車流會產生的影響。 此研究所採用的研究方法為模擬法，並以PTV VISSIM軟體進行模擬。將新北市淡海輕軌系統作為研究範圍，對淡海輕軌一期路網進行不同號誌控制策略之模擬，包括定時號誌、相對優先和絕對優先策略，並根據模擬之結果進行道路服務水準分析，以評估不同號誌控制策略道路對車流的影響。此外，本研究針對一期路網之號誌控制策略提出兩項建議方案，分別為全線採用同種號誌控制策略之方案，以及各路口採用不同號誌控制策略之混合方案。根據模擬分析結果顯示，各路口採用不同號誌控制策略之方案可有效降低路網之總延滯，並減少輕軌之總旅行時間及停等延滯，更優於全線採用同種號誌控制策略之方案。 此外，本研究考量未來我國輕軌系統Ｃ型路權之引進，透過文獻及案例分析綜整出不同類別如軌道端、公路端及行人配套等相關配套措施，並選擇適用之方案於淡海輕軌二期路網中進行模擬，以探討配套方案之可行性。最後，透過模擬結果提出可行之建議方案，期望提升淡海輕軌系統實施共用路權後整體道路之安全性。

In recent years, Taiwan has been actively constructing light rail transit systems. However, effectively managing these systems according to the specific conditions of each region has become a new challenge. The adoption of different signal priority strategies and light rail right-of-way types not only significantly affects the operational efficiency of the light rail system but also has varying impacts on road traffic. Therefore, this study aims to evaluate the choice of signal priority and the implementation of C-type right-of-way and their impacts on road traffic. The research method employed in this study is simulation-based, using PTV Vissim software. The scope of the study focuses on the DanHai Light Rail System in New Taipei City. Different signal control strategies, including fixed-time signals, relative priority, and absolute priority, are simulated in the first stage of network. Based on the simulation results, a road service level analysis is conducted to assess the impacts of different signal control strategies on road traffic. Additionally, two proposed alternative schemes are suggested for the signal control strategy of the first stage of network: one involving a consistent signal control strategy across the entire network and the other one incorporating with different signal control strategies at each intersection. According to the simulation analysis results, the mixed strategy effectively reduces overall network delay and decreases total travel time and wait time for the light rail system, outperforming the consistent strategy across the network. Furthermore, considering the future introduction of C-type right-of-way for light rail systems in Taiwan, this study integrates relevant measures, such as track ends, road sections, and pedestrian facilities, through literature review and case analysis. A suitable scheme is selected for simulation in the second stage of network to explore the feasibility of the measures. Finally, recommendations are proposed based on the simulation results, with the aim of enhancing the overall road safety after the implementation of shared right of way for the DanHai Light Rail system.