The Taoyuan Metro system connects Taoyuan International Airport to the city of Taipei, New Taipei, and Taoyuan. The 31.71 miles began operation on March 2, 2017, offering commuter and express services. The railway network consists of five lines four of which use the standard gauge track. The line consists of maintenance depot in Qingpu and Luzhu, seven underground stations, and 15 elevated stations. The airport is served by four underground stations and a 4.26 mi long line