Blue line (Taichung Metro)

The Blue line is a proposed rapid transit line in Taichung and will be operated by Taichung Metro.

Route description
The Blue line will begin at the Port of Taichung and follows Taiwan Boulevard for its entire length until it reaches Taichung railway station. Then, it will cross the railway tracks and terminate in East District. The tracks will be elevated from the Port of Taichung until the border of Longjing District and Xitun District, where the tracks then proceed underground. The depot will be located in Longjing District near the Longjing Interchange of National Freeway 3.

History
The planning of network of rapid transit in Taichung was initially started in 1990s. A prototype of rapid transit line running on Taiwan Boulevard (then known as Zhonggang Road) was first proposed in 1998, along with the current Green line and a third Red line, but never progressed past the planning stage.

During his mayoralty, Lin Chia-lung continued to advocate for a rapid transit line along the route. In October 2018, the Executive Yuan approved the feasibility study submitted by the Taichung City Government. In 2019, the line embarked on its overall planning phase with an estimated cost of $128.56 billion NTD.

A proposal for the Blue line was approved by the Ministry of Transportation and Communications in late January 2024. Construction of the Blue line was expected to take ten years, and cont NT$161.51 billion, of which of which NT$67.56 billion was to be funded by the Executive Yuan. The planned Blue line is to start at the Port of Taichung, travel eastward through Shalu and Xitun, before terminating in central Taichung.