Provincial Highway 12 (Taiwan)

Highway 12 begins on the north side of Taichung railway station, where it runs as a four-lane road in a northwest direction through Central District. After crossing Highway 1A in West District, Taichung, the road widens into a six lane road with additional separated motorcycle lanes on each side. The two lanes directly adjacent to the motorcycle lane divider are bus lanes, which were formerly dedicated to the Taichung BRT, but now permit conventional buses to run on.[4] In Xitun District right after Maple Garden Park, the middle lanes are elevated over Route 127 on an overpass known as Guangming Overpass (光明陸橋) before returning to ground level to pass under Highway 74.[5] Then, the highway connects to National Freeway 1.

After crossing the Fazi River, the road begins its ascent over Dadu Plateau. At its peak near Tunghai University, the road meets Zhongxing Rd, which connects to Route 136 for access to National Freeway 3. Here, Highway 12 turns north as it descends into Shalu District. The bus lane ends at Providence University. At downtown Shalu, the road turns northwest and is elevated again to cross the Western Trunk railway line on an overpass named Shalu Overpass (沙鹿陸橋).[6] After the overpass, the highway flattens out as it enters Wuqi District. It crosses Highway 1, Highway 61, and lastly Highway 17 before arriving at the gate of the Port of Taichung.