The Taichung Line (Chinese: 臺中線 or 台中線; pinyin: Táizhōng Xiàn), also known as the Mountain Line (Chinese: 山線; pinyin: Shān Xiàn), is a line of the Taiwan Railway Administration. It is It has a total length of 85.5 km, of which all but 2.2 km (the Chengzhui Line from Chenggong to Zhuifen) is double track.
The Taichung Line was completed in 1908. After the Coast Line between Zhunan and Changhua was finished in 1922, the original line was called Taichung Line. In 1998, the construction to expand to two tracks (double tracks) was completed. Long tunnels were built to reduce the grade of the line. Sanyi Tunnel is one of the longest railway tunnels in Taiwan. The opening of the new segment of the line relegated the previous segment of the line to become the Old Mountain Line.
Currently, the Railway Reconstruction Bureau is transforming the section of the line from Fengyuan to Daqing into an elevated line. Slated for completion in 2017, the project will replace Fengyuan, Tanzi, Taiyuan, Taichung, and Daqing Stations with new, elevated stations, and create the new stations Fengnan, Toujiacuo, Songzhu, Jingwu, and Wuquan.
|Station Name||Transfers and Notes||Location|
|Zhunan||Jhunan||竹南||→ West Coast Line||Zhunan||Miaoli
|Sanyi||三義||→ Old Mountain Line (limited services)||Sanyi|
|Taichung TRA station||臺中||Central|
|Daqing||Dacing||大慶||Taichung Metro : G13 Daqing (u/c)|
|Wuri||Wurih||烏日||Taichung Metro : G16 Wuri (u/c)||Wuri|
|Xinwuri||New Wurih||新烏日|| Taichung
Taichung Metro: G17 Xinwuri (u/c)
|Zhuifen||Jhueifen||追分||Via branch line
→ West Coast Line
|Changhua||彰化||→ West Coast Line||Changhua||Changhua
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