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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 second-longest road tunnel in Japan (~10.7 km) Tokyo Bay Aqua-Line bridge-tunnel: 18 December 1997: Kawasaki, Kanagawa: Kisarazu, Chiba: the third-longest road tunnel in Japan Enasan Tunnel - Chūō Expressway: 1985: Nagano: Nakatsugawa City, Gifu: the fourth-longest road tunnel in Japan (~8.6 km) Ikuta Tunnel - Musashino Line: 1976: Ikuta ...
Seikan Tunnel: Tsugaru Strait, Japan 53,850 m (33.461 mi) 1988 74 m 2; longest railway tunnel until 2016. Longest tunnel with an undersea section, running between Honshu and Hokkaido. Undersea section measures 23.3 kilometres (14.5 mi). Metro Beijing Subway Line 6: Beijing, China 53,400 m (33.181 mi) 2012–2018 Water supply Želivka Water ...
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 ...
A sketch (not to scale) of a typical cross section of the Seikan Tunnel, an underwater railway tunnel in Japan. Inspiration provided by: Morse, p52, bottom figure [1] & Paulson, figure 8. [2] (1): Main tunnel. 11-11.4 metres wide. Horseshoe shape shown, but a circular cross section was used in areas with difficult geology.
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]
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.
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