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]

Jinjiazhuang Tunnel
Overview
LocationChicheng, Zhangjiakou, China
Coordinates40°53′56″N 115°32′55″E / 40.8989°N 115.5486°E / 40.8989; 115.5486
StatusActive
RouteS3801 Beijing-Chongli Expressway
StartZhuanlou village, Chicheng
EndZhuanlou village, Chicheng
Operation
OperatorHebei Expressways
Technical
Length4,228 m (13,871 ft) (left tube) 4,104 m (13,465 ft) (right tube)
No. of lanesTwo in each tunnel
Operating speedSpeed limit: 80 km/h (50 mph)
Grade2%

The tunnel is on S3801 Beijing-Chongli Expressway. The Expressway is the main route from the Yanqing cluster to the Chongli cluster of the Beijing 2022 Winter Olympics.[3]

References

edit
  1. ^ "World's Longest Spiral Highway Tunnel".
  2. ^ A new Guinness record! World's longest spiral highway tunnel in N. China. 18 August 2019.
  3. ^ a b "延崇高速金家庄螺旋隧道右线贯通". 16 August 2019. Archived from the original on August 18, 2019. 延庆至崇礼高速公路是北京2022年冬奥会期间北京市进入崇礼赛区的公路主通道