Haven’t checked with the progress lately, but does anyone know how the lines will go through Taipei? Earlier I knew there were dispute with TRA (Taiwan Railroad Administration) when they tried to borrow 4 tracks from the main station underground, basicly they couldn’t expand and add tracks underground, which would endanger foundation of the station.
The problems with the govt is, they never planned ahead, during the early 80s when they started burying the railroads underground, they never planned for future expansions nor other uses.
In terms of train stations, I think they are Nangang -Taipei -Banqiao-Taoyuan (Qingpu) -Xinzhu (Liujia) -Miaoli-Taizhong (Wuri) -Zhanghua-Yunlin (Huwui) -Jiayi (Taibao) -Tainan (Shalun) - Gaoxiong (Zuoying, later to downtown Gaoxiong)
Nangang is still under consideration I think, to alleviate congestions at Taipei station for passengers transfering from east coast line. Funny thing is, they originally planned only 3 stations Taipei-Taizhong-Gaoxiong, then every county fought to have a station, this is how it ends up. The fastest train is Taipei-Taizhong-Gaoxoing for 90 min (the last time I read).