Pingtung City
The highway begins at Laonong (荖濃) in Liouguei District, Kaohsiung, at the intersection with Highway 20. The highway continues along Laonong Creek and enters Pingtung County, passing through Gaoshu, Yanpu, and Changzhi. The road then enters downtown Pingtung City, before heading to the coastal regions. After passing through Wandan, the road ends at Xinyuan at the intersection with Highway 17.