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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.
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.
Ma'anshan Tunnel China 6.252 km (3.885 mi) 2025 2 G42 16 Chengdu-Lijiang Expressway: 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
The SZB project includes a 6.7 km-long (4.2 mi) immersed tube which also will be the world's widest immersed tube, carrying eight traffic lanes. [11] Prior to the completion of the Marmaray and HZMB tunnels, the Transbay Tube in San Francisco Bay, completed in 1969, was the world's deepest and longest immersed tube, at 41 metres (135 ft) below ...
Jinggangshan Tunnel China 14.110 km (8.768 mi) 2028 Chongqing-Xiamen High Speed Railway: Wutaishan Tunnel China 14.086 km (8.753 mi) 2027 Xiong'an-Xinzhou High speed railway: Lulang Tunnel China 14.052 km (8.732 mi) 2030 Sichuan-Tibet railway: Patalpani Rail Tunnel India (Madhya Pradesh) 14.000 km (8.7 mi) [citation needed]
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
Artemisio Tunnel (road), double tunnel, under Mount Artemision, 1.40 km; 76 tunnels of the A2 motorway (Egnatia Odos), most notably in parts of Epirus and Western Macedonia, combined length of 99 km, the longest of which are Driskos Tunnel 4.6 km, Metsovo Tunnel 3.5 km, Dodoni Tunnel 3.6 km, Kastania Tunnel 2.2 km, Anilio Tunnel 2.1 km