Hsuehshan Tunnel

This from a 12,917 m long east - and a 12,942 m long west tube and a pilot tunnel ( 12,941 m) existing building is the longest tunnel in Taiwan, the second longest after the Zhongnanshan tunnel in the People's Republic of China road tunnel in East Asia and the fifth longest road tunnel in the world. At the same time he is after the Zhongnanshan Tunnel the second longest two -tube road tunnel in the world.

The tunnel was built to improve accessibility of the surrounding mountains of Yilan County in northeastern Taiwan and to promote the development of the sparsely populated and remote traffic- east of the island.