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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.
Longest tunnel on the upgraded dual-track Xining–Golmud section of Qinghai–Tibet Railway, longest railway tunnel in China until 2016, 3323.58–3380.97 meters above sea level Metro Meijo Line – Meikō Line: Nagoya Municipal Subway, Japan 32,400 m (20.132 mi) 1965–2004 Metro Guangzhou Metro: Line 2: Guangzhou, China 32,000 m (19.884 mi) 2010
Nanyanshan Tunnel China 7.833 km (4.867 mi) 2028 2 Yiwu-Longquan-Qingyuan Expressway Zhushanhu Tunnel China 7.810 km (4.853 mi) 2024 2 Jiangsu S341 Highway Dongshan Tunnel China 7.810 km (4.853 mi) 2024 2 Shanxi S66 Fenyang-Shilou Expressway Yangzong Tunnel China 7.770 km (4.8 mi) 2024 2
Cross-Harbour Tunnel (underwater) (road) Eagle's Nest Tunnel (cross-mountain) (road) Eastern Harbour Crossing / Tseung Kwan O line (road and metro) Kai Tak Tunnel (beneath site of former Hong Kong International Airport) (road) Lion Rock Tunnel (cross-mountain) (road and water pipe) Sha Tin Heights Tunnel (cross-mountain) (road)
The longest underwater road tunnel in the world Arlberg: Austria (Vorarlberg - Tyrol) 13.972 km (8.7 mi) 1978 1 S16/E60 "World's longest tunnel" 1979 - 1980: Xishan Tunnel: China 13.654 km (8.5 mi) 2012 [25] 2 S56 Shanxi Taiyuan-Gujiao Expressway Left tube：13.654 m, right tube：13.570 m New Erlangshan Tunnel [26] China
No metro, but some long road tunnels, including Hvalfjörður Tunnel at 5.8 km (3.6 mi) and some longer, and the longest (non-road) hydroelectric tunnel in Europe, one of the longest tunnels of any kind in the world, at Kárahnjúkar Hydropower Plant at 39.7 km (24.7 mi)
The Chinese railway tunnels are divided into four classes by length: Super-long tunnels (over 10,000 metres) Long tunnels (between 3,000 and 10,000 metres) Middle tunnels (between 500 and 3,000 metres) Short tunnels (less than 500 metres) By 2008, there were 6,102 railway tunnels in operation in China. Their total length reached 3,938,913 ...
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).