The highway begins at the intersection of
PH 1 in Qingshui. PH 1 turns slightly towards inland and PH 17 continues along the coast. PH 17 runs parallel with PH 61 (Xibin Expressway), and shares
concurrency with the latter from
Dacheng in Changhua County to
Mailiao in Yunlin county, from
Dongshi to
Taixi in Yunlin County, and from
Kouhu in Yunlin County to
Dongshi in Chiayi County. 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. In Tainan City the highway intersects
PH 84 in
Beimen and
PH 86 just south of the central area of the city. 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. The highway passes through the following counties and cities:
Taichung City,
Changhua County,
Yunlin County,
Chiayi County,
Tainan City,
Kaohsiung City, and
Pingtung County. ==Spur routes==