Provincial Highway 21 (Taiwan)


Taiwan Provincial Highway No. 21 is a Provincial Highway in Taiwan that begins Tianleng, Dongshi District, Taichung City, at the intersection with Provincial Highway No. 8, and ends at Tataka, where it is connected with Provincial Highway No. 18 in Yushan National Park. It is the primary highway to the Sun Moon Lake, a popular tourist destination. The total length is 145 km.
A southern segment of the highway became Provincial Highway 29 in 2014. The segment was from Namasia to Linyuan in Kaohsiung City, and ran along the Cishan River as well as the Gaoping River. The road that connects both segments between Tataka and Namasia is not built due to environmental and ecological issues.

Route

Provincial Highway No. 21 begins at Dongshi District, Taichung City, then passes through Guoxing, Puli, Yuchih, Sun Moon Lake, Shuili, Xinyi, and ended in Tataka. Its length is 149.126 km.
The highway is a part of Fengpu Highway that runs from Fengyuan to Puli. The segment from Puli to Sun Moon Lake is a part of Zhongtan Highway, which connects downtown Taichung with the lake. The segment from Sun Moon Lake to Tataka is a part of the unfinished New Central Cross-Island Highway. The cross-island highway plan was formally abandoned due to environmental concerns.

Branch Line

The only branch line is named as Provincial Highway No. 21A, which is around the east side of Sun Moon Lake in Yuchih, Nantou County. Its length is 20.792 km.