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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).
There are four classes of road tunnels in China by length. [1]Super-long tunnel (>3,000m) Long tunnel (1,000m-3,000m) Middle-tunnel (250m-1,000m) Short tunnel (<250m) By 2012, there are 10,022 road tunnels and 8,052.7 km in total length in mainland China, including 441 super-long tunnels with 1,984.8 km in total length and 1,944 long tunnels with 3,304.4 km in total length.
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China National Highway 318 between Yajiang and Kangding, Sichuan. The building of highways is seen as key to accelerating infrastructure construction. In 2003, completed investment in highway construction was 350 billion yuan and 219 key highway projects progressed, focusing mainly on the five north–south and seven east–west national arterial highways as well as highways in western China ...
Qingdao Jiaozhou Bay Tunnel is an under-sea road tunnel located in Qingdao, Shandong Province in eastern China. It crosses underneath Jiaozhou Bay , connecting Huangdao District to the south with Shinan District in the north at the narrow entrance to the bay.
The tunnel, which will be 18 kilometers (11.1 miles) long, is one of Europe’s largest infrastructure projects, with a construction budget of over 7 billion euros ($7.1 billion).
Mangkangshan Tunnel (芒康山隧道) Tibet: 30.675 km (19.1 mi) 2x1 u/c Sichuan-Tibet railway: Zilashan Tunnel (孜拉山隧道) Tibet: 30.010 km (18.6 mi) 2x1 u/c Sichuan-Tibet railway: Shenwan Tunnel (深莞隧道) Guangdong: 29.944 km (18.6 mi) 2x1 u/c Shenzhen-Zhanjiang high-speed railway: Boshulaling Tunnel (伯舒拉岭隧道) Tibet
A secret tunnel discovered last week on the U.S.-Mexico border will be sealed by Mexican authorities, an army official in Ciudad Juarez said Saturday. The tunnel, discovered on Jan. 10, connects ...