Organization Act of the Freeway Bureau, Ministry of Transportation and Communications Article 1

The Ministry of Transportation and Communications specially set up the Highway Bureau (hereinafter referred to as the “Bureau”) to organize the maintenance, building, and expansion construction, and management of national highways.
中文原文 交通部高速公路局組織法第1條
交通部為辦理國道之養護、新建、拓建工程及管理等業務,特設高速公路局(以下簡稱本局)。

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