The Regulation Governing the Handling of Investigation Procedures for Major Highway Occurrence Article 9

In the event of a major highway occurrence, the Ministry of National Defense, the Highway Bureau of the Ministry of Transportation and Communications (the “Highway Bureau”), the Freeway Bureau of the Ministry of Transportation and Communications (the “Freeway Bureau”), the local government, and the local police department shall provide spaces for the operations of the investigation command post, temporary wreckage storage, as well as communication and office equipment.The TTSB may request the local government and the police department to take necessary security and precautionary measures on-site so as to prevent the wreckage or hazardous materials on board from endangering the public and to preserve the integrity of the scene.
中文原文 重大公路事故調查作業處理規則第9條
重大公路事故發生後,國防部、交通部公路局(以下簡稱公路局)、交通部高速公路局(以下簡稱高公局)、事故地區之地方政府或各警察機關應提供調查指揮中心作業及汽車殘骸暫存所需場地、通信及辦公設備。
運安會得協請地方政府及各警察機關對事故地區執行必要之安全維護及戒護措施,避免事故汽車之殘骸或所裝載之危險物品危及民眾安全,並防止現場遭人為破壞。

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