- Source: Provincial Highway 31 (Taiwan)
- Jembatan Guandu
- Provincial Highway 31 (Taiwan)
- Provincial Highway 74 (Taiwan)
- Provincial Highway 66 (Taiwan)
- Provincial Highway 72 (Taiwan)
- Provincial Highway 64 (Taiwan)
- Highway system in Taiwan
- Provincial Highway 30 (Taiwan)
- Provincial Highway 4 (Taiwan)
- Provincial Highway 7 (Taiwan)
- Provincial Highway 15 (Taiwan)
Provincial Highway 31 (Chinese: 台31線) is a 30.036-kilometre-long (18.664-mile) provincial highway in Taoyuan City, Taiwan. An elevated section of the Taiwan High Speed Rail viaduct and under-tunnel acts as a median for most of the highway, except when the highway is near THSR Taoyuan Station and when the highway is near and on its southern terminus. The highway serves the THSR Taoyuan Station.