Provincial Highway 31 (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.
Major intersections
| County | Location | km | mi | Destinations | Notes |
|---|---|---|---|---|---|
| Luzhu | 0.0 | 0.0 |   Prov 4 (Nankan Road) to Nat 1 – Zhuwei, Taoyuan District | ||
| 0.75 | 0.47 | TR 15 (Fuguo Road) – Shuiwei, Zhuwei, Taoyuan District | |||
| 2.1 | 1.3 | TR 19 (Fuhua Road) – Dahua, Luzhu Village | |||
| 4.8 | 3.0 |   Nat 2 – Taoyuan International Airport, Taoyuan District | Exit 5 (Dazhu Interchange) on Fwy. 2 | ||
| 4.8 | 3.0 |  Cty 110 (Xinsheng Road) – Dayuan, Dazhu | Northbound exit and southbound entrance | ||
| Dayuan | 5.7 | 3.5 |  Cty 110A (Zhongzheng East Road) to Nat 1 – Zhongli, Dayuan | ||
| Zhongli | 8.8 | 5.5 |   Cty 113C north (Qingpu Road) – THSR Taoyuan Station | North end of CR 113C concurrency | |
| 9.3 | 5.8 | Cty 113C south (Xinsheng Road) – Zhongli | South end of CR 113C concurrency | ||
| 10.6 | 6.6 |  Cty 113 – Central Zhongli, Dayuan | |||
| 11.8 | 7.3 | TR 43-1 (Shengde Road) – Zhongli, Dayuan | |||
| 12.9 | 8.0 |  Cty 112 (Zhongzheng Road) – Zhongli, Guanyin | |||
| Zhongli–Xinwu border | 16.5 | 10.3 |  Cty 114 (Minzu Road) to Nat 1 | ||
| Xinwu | 17.9 | 11.1 |  Prov 66 to Nat 1 – Pingzhen, Daxi, Guanyin | At-grade intersection | |
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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