[1] The highway begins at the intersection of PH 1 in Qingshui.

In Qingshui the highway intersects Freeway 4, which provides connection to the inland districts in Taichung City.

The highway also intersects PH 78 in Taixi and PH 82 in Dongshi; both are expressways connecting to the more populated inland areas in Yunlin and Chiayi.

The highway also passes through the terminus of Sun Yat-Sen Freeway in downtown Kaohsiung City.

The highway ends at Fangliao at the intersection of PH 1.