Changhua City
The highway begins at the intersection with PH 1 in downtown Changhua City. After the intersection with Freeway 1, the highway continues south and meets PH 76 in Puyan, Changhua County, PH 78 in Yuanchang, Yunlin County, PH 82 in Puzi, Chiayi County, as well as PH 84 in Syuejia, Tainan City. The highway meets with Freeway 8 in Anding, before ending at the urban district of Yongkang, Tainan City, at the intersection with PH 1.