The Seikan Tunnel (青函トンネル Seikan Tonneru or 青函隧道 Seikan Zuidō) is a 53.85-kilometre (33.46 mi) railway tunnel in Japan, with a 23.3-kilometre (14.5 mi) long portion under the seabed. The track level is about 140 metres (460 ft) below the seabed and 240 m (790 ft) below sea level. It travels beneath the Tsugaru Strait — connecting Aomori Prefecture on the Japanese island Honshu and the island Hokkaido — as part of the Kaikyo Line of Hokkaido Railway Company. The name Seikan comes from combining the on'yomi readings of the first characters of Aomori (青森?) and Hakodate (函館?), the nearest major city on the Hokkaido side.
Seikan is both the longest and the deepest operational rail tunnel in the world; the Gotthard Base Tunnel in Switzerland will be longer when it opens to traffic in 2016. It is also the longest undersea tunnel in the world, but the Channel Tunnel between the United Kingdom and France has a longer undersea portion.
Other articles related to "seikan tunnel, seikan, tunnel":
... T/yr) Mode 1955 2,020,000 3,700,000 Seikan Ferry 1965 4,040,000 6,240,000 Seikan Ferry 1970 9,360,000 8,470,000 Seikan Ferry 1985 9,000,000 17,000,000 1971 Forecast 1988 ~3,100,000 — Seikan ...
... the Hokkaido city of Hakodate through the Seikan Tunnel with scheduled completion in March 2016 ... be limited to 140 km/h when traversing the dual gauge Seikan tunnel due to the risk of narrow gauge freight trains traveling in the opposite direction being derailed by the shockwave of air that moves ahead of ... There are currently approximately 50 freight trains traversing the Seikan tunnel each day, and so limiting the travel of such trains through the tunnel to times outside of Shinkansen services is not an option ...
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