3 in Changhua City and ends at Wufeng Interchange on Freeway No.

74A, Chinese: 台74甲線) which starts at the western end of Provincial Highway No.

74 (Kuaiguan Interchange) and ends at Provincial Highway No.

The original plan has a western section between Changhua Coastal Industrial Park and Hemei Interchange of Freeway in Hemei, Changhua.

The exact route has now been constructed and named as Provincial Highway No.