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6.955 km (4.3 mi) 2000 1 180 Egan Tunnel [34] China (Hubei-Jiangxi) 6.948 km (4.317 mi) 2012 2 G45 Daqing–Guangzhou Expressway: Héðinsfjarðargöng I Iceland 6.93 km (4.3 mi) 2010 1 76 Daliangshan Tunnel China 6.900 km (4.287 mi) [35] 2023 2 Lincang-Qingshuihe Expressway Shanghai North Horizontal Corridor East Tunnel
Construction started in March 2015. Together with the already constructed Inntal Tunnel it will form the world's longest continuous railway tunnel with 64 km. [97] [98] Metro Thomson–East Coast Line: MRT, Singapore 43,000 m (26.719 mi) 2024 Excluding planned extension Railway Yigong tunnel: Tibet, China 42,500 m (26.408 mi) [99] 2030
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
The Lærdal Tunnel is the first in the world to be equipped with an air treatment plant, located in a 100-metre (330 ft)-wide cavern about 9.5 kilometres (5.9 mi) northwest of Aurlandsvangen. Air from the tunnel is drawn into the plant by two large fans, particulates (dust and soot) are removed by an electrostatic filter , and nitrogen dioxide ...
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The Gotthard Road Tunnel in Switzerland runs from Göschenen in the canton of Uri at its northern portal, to Airolo in Ticino to the south, and is 16.9 kilometres (10.5 mi) in length below the St Gotthard Pass, a major pass of the Alps. At time of construction, in 1980, it was the longest road tunnel in the world; it is currently the fifth ...
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).
The Lærdal Tunnel in Norway from Lærdal to Aurland is the world's longest road tunnel, intended for cars and similar vehicles, at 24.5 km (15.2 mi). The Zhongnanshan Tunnel in People's Republic of China opened in January 2007 is the world's second longest highway tunnel and the longest mountain road tunnel in Asia, at 18 km (11 mi).