Provincial Highway 12, named as Taiwan Boulevard (台灣大道) for its entire length, is a 23.2 km[1] east–west highway that connects Port of Taichung in Wuqi with downtown Taichung City.

Between 2014 and 2015, the Taichung BRT ran on Highway 12 between Taichung railway station and Providence University in Shalu District, and there are plans to build a metro line at the BRT system's former course.

[4] At downtown Shalu District, the route turns south and begins climbing the Dadu Plateau.

At the bottom, the road crosses the Fazi River, then connects to National Freeway 1 and Highway 74 before the middle lanes are elevated over County Route 127 on an overpass known as Guangming Overpass (光明陸橋).

The road continues through Central District before ending at the north side of Taichung railway station.