Jinjiazhuang Tunnel
Jinjiazhuang Tunnel (Chinese: 金家庄隧道) or Jinjiazhuang Spiral Tunnel (Chinese: 金家庄螺旋隧道), is the world's longest highway spiral tunnel.[1][2] The spiral has a curve radius of 860 metres (2,820 ft) and the elevation difference between the tunnel entrance and exit is 112 metres (367 ft).[3]
| Overview | |
|---|---|
| Location | Chicheng, Zhangjiakou, China |
| Coordinates | 40.8989°N 115.5486°E |
| Status | Active |
| Route | S3801 Yanchong Expressway |
| Start | Zhuanlou village, Chicheng |
| End | Zhuanlou village, Chicheng |
| Operation | |
| Operator | Hebei Expressways |
| Technical | |
| Length | 4,228 m (13,871 ft) (left tube) 4,104 m (13,465 ft) (right tube) |
| No. of lanes | Two in each tunnel |
| Operating speed | Speed limit: 80 km/h (50 mph) |
| Grade | 2% |
The tunnel and the Yanchong Expressway will form the main route from Beijing to the Yanqing cluster of the Beijing 2022 Winter Olympics.[3]
References
- "World's Longest Spiral Highway Tunnel".
- A new Guinness record! World's longest spiral highway tunnel in N. China. 18 August 2019.
- "延崇高速金家庄螺旋隧道右线贯通". 16 August 2019.
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