[1] Planning of the Taichung MRT started in 1990 with a study conducted by the Taiwanese Bureau of Housing and Urban Development.

On 9 March 2011, Kawasaki Heavy Industries announced that it had won a joint order with Alstom Transport SA (France) and CTCI Corp. (Taiwan) to supply 36 units consisting of two-car, driverless trains totaling 29.5 billion yen.

[5] While Kawasaki will oversee construction, Alstom will focus on signaling and CTCI will supply the electrical system.

[9] It was expected to cost NT$53.491 billion and was built by the Taipei City Department of Rapid Transit Systems.

[13] In 2014, the Blue line began service as a BRT system running between Providence University and Taichung railway station.

A proposal for the Blue line MRT was approved by the Ministry of Transportation and Communications in late January 2024.

However, after multiple proposals to build a MRT and BRT line were rejected by the Ministry of Transportation and Communications, the city government turned to an LRT system.

Kenan Aiqin Bridge (科湳愛琴橋), which crosses over National Freeway 1 and Provincial Highway 74, has a space on the center median allocated for the line.