The Taipei Underground Street is located under the city’s Civic Avenue, starting from the east of Tacheng Street in the west, passing through important north-south arterial road junctions such as Yanping North Road, Chongqing North Road, and Taiyuan Road along Civic Avenue. It is surrounded by Taipei Main Station, MRT Beimen Station, Taiwan Railway, and High Speed Rail, and is connected to Q-Square (Taipei Transit Station). Its total length is 825 meters, and the width is 36 to 39 meters.