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The Seikan Tunnel (Japanese: 青函トンネル, Seikan Tonneru or 青函隧道, Seikan Zuidō) is a 53.85 km (33.46 mi) dual-gauge railway tunnel in Japan, with a 23.3 km (14.5 mi) portion under the seabed of the Tsugaru Strait, which separates Aomori Prefecture on the main Japanese island of Honshu from the northern island of Hokkaido.
The 3 ft (914 mm) narrow-gauge line descends from the Seikan Tunnel Memorial Hall, near Cape Tappi, into an underground station on the Seikan Tunnel, which is one of the longest railway tunnels in the world (which opened in March 1988), second to the Gotthard Base Tunnel in Switzerland that opened in June 2016. [2] [3]
Seikan undersea tunnel entrance on Honshu side. The first undersea Kanmon Railway Tunnel between Honshu and Kyushu islands built in 1936 - 1942. This list of tunnels in Japan includes any road, rail or waterway tunnel in Japan .
From Japan to the Swiss Alps and the American Rockies, these are some of the world’s most fascinating tunnels. Carving their way beneath oceans, glaciers and mountains, tunnels are an enduring ...
The dual-gauge Kaikyo Line near Kikonai Station in March 2016. In preparation for the opening of the Hokkaido Shinkansen, the Seikan Tunnel (Kaikyō Line) and associated approaches (approximately 82 km or 51 mi in total) [6] were converted to dual gauge, with both the Shinkansen 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard and 1,067 mm (3 ft 6 in) narrow gauge tracks.
Qunke Tunnel China 14.955 km (9.3 mi) 2028 Chengdu–Lanzhou Railway: Duomuge Tunnel China 14.884 km (9.248 mi) 2030 Sichuan-Tibet railway: Tiefengshan Tunnel China 14.783 km (9.186 mi) 2028 Chongqing-Xi'an HSR: Hengshan Tunnel China 14.76 km (9.2 mi) [88] 2025 Jining–Datong–Yuanping HSR: Tianzhushan No1 Tunnel
Longest railway tunnel until Seikan Tunnel was opened. Water supply Eucumbene-Tumut Tunnel [43] New South Wales, Australia 22,200 m (13.794 mi) 1959 Part of the 145 km tunnel network of the Snowy Mountains Scheme: Road WestConnex: Sydney, New South Wales, Australia 22,000 m (13.670 mi) 2023 (2019–2020 partial completion) Railway
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