Provincial Highway 72 (Chinese: 台72線) is an expressway, which begins in Houlong, Miaoli on Guanghua Road (Provincial Highway No.

1) and ends in Shitan, Miaoli on the Provincial Highway No.

Tongluo IC - Shitan End completed on January 29, 2005.

There is a 2 km planned route west of the Provincial Highway No.

A trial program to allow a motorcycle with a cylinder capacity of more than 250 cm3 or with an electric power of more than 40 horsepowers was started in January 2005 for one year.