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Longest conventional railway tunnel. It is also the world's longest transit tunnel by geodetic distance; 55.782 km (34.661 mi) between the two portals. Total 151.84 km (94.35 mi) of broken out tunnels through solid rocks. [6] [7] Part of the NRLA. Metro Beijing Subway Line 10: Beijing, China
An immersed tunnel is planned for the Fehmarn Belt. At 17.6 km (10.9 mi), it will be the longest ever constructed, surpassing the current largest immersed tube tunnel, which spans 6.75 km (4.19 mi) across the Pearl River Estuary in China as part of the Hong Kong–Zhuhai–Macau Bridge.
[3]: 268 The oldest immersed tube in Europe is the Maastunnel in Rotterdam, which opened in 1942. [4] The Marmaray Tunnel, connecting the European and Asian sides of Istanbul, Turkey, is the world's deepest immersed tunnel at 55 metres (180 ft) below sea level; [5] it is the first rail link crossing the straits. Construction began in 2004 and ...
Descending up to 40 meters beneath the Baltic Sea, the world’s longest immersed tunnel will link Denmark and Germany, slashing journey times between the two countries when it opens in 2029.
Qianhaiwan Tunnel China 6.280 km (3.902 mi) 2024 2 Mawan Cross-sea Corridor Jiugongshan #2 Tunnel China (Jiangxi-Hubei) 6.210 km (3.859 mi) 2025 2 Xianning-Wuning Expressway Ruhamo Tunnel China 6.135 km (3.8 mi) 2026 2 G76 11 Duyun-Shangri-la Expressway: Maojiagou Tunnel China 6.120 km (3.8 mi) 2024 2
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
Not only is it one of Europe’s largest infrastructure projects but the underwater road and rail tunnel will be the longest in the world once it opens in 2029.
The Seikan Tunnel is the world's longest undersea tunnel by overall length (the Channel Tunnel, while shorter, has a longer undersea segment). [3] It is also the second-deepest transport tunnel below sea level after the Ryfylke Tunnel , a road tunnel in Norway that opened in 2019, and the second longest main-line railway tunnel after the ...