Mass Rapid Transit Act Article 40

1.The local competent authority of the mass rapid transit system shall establish a dedicated traffic police department to maintain order along the routes, at depots,at stations and operation of the mass rapid transit system to ensure passengers’ safety; meanwhile, the local competent authority shall take responsibility for directing and supervising the traffic police on duty.2. For the mass rapid transit system adopting a non-exclusive right-of-way and sharing road lanes with other vehicles, traffic management shall be regulated following the Road Traffic Management and Punishment Code and its relevant regulations.
中文原文 大眾捷運法第40條
大眾捷運系統地方主管機關,為防護大眾捷運系統路線、維持場、站及行車秩序、保障旅客安全,應由其警察機關置專業交通警察,執行職務時並受該地方主管機關之指揮、監督。
大眾捷運系統採用非完全獨立專用路權,涉共用現有道路之車道部分,其道路交通之管理,依道路交通管理處罰條例及其相關法規辦理。

English translation for reference only; the Chinese text prevails. Not legal advice.