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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 ...
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).
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
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The Seikan Tunnel is the world's longest tunnel with an undersea segment: 53.8 km: 240 m: 1971–1988 Flekkerøy Tunnel: Flekkerøy, Norway: Connecting the island community of Flekkerøy in southern Norway to the mainland: 2.3 km: 101 m: 1986–1989 Sydney Harbour Tunnel: Sydney, Australia: 2.8 km: 1988–1992 Channel Tunnel: England – France
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.