Provincial Highway 66 () is an expressway, which begins in Guanyin District, Taoyuan City on Provincial Highway 61 and ends in Daxi District, Taoyuan City, on County Road 112A. Major urban areas along the route Yangmei District Pingzhen District Zhongli District Daxi District Major intersections {| class="plainrowheaders wikitable" |- !scope=col|City !scope=col|Location !scope=col|km !scope=col|Mile !scope=col|Exit !scope=col|Name !scope=col|Destinations !scope=col|Notes |- Notes The elevation of the main line between Provincial Highway 31 and Township Road 102 was completed in June 2014. References Taiwanese Directorate General of Highways, MOTC Highways in Taiwan