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Shimizu Tunnel : ウィキペディア英語版 | Shimizu Tunnel
is a railroad tunnel in Gunma and Niigata Prefectures of Japan, operated by JR East Jōetsu Line. The name originates from the Shimizu mountain pass nearby. There are three tunnels near each other, which are the Shimizu Tunnel, the Shin-Shimizu Tunnel, and the Dai-Shimizu Tunnel. ==Shimizu tunnel== The Shimizu tunnel is the oldest of the three, opened in 1931〔(JR East timeline )〕 after nine years of construction. The length of the tunnel is 9,702 m, and has a single track. Because of technical difficulties at the time, a spiral was built, with a diameter of 800 m.〔(Map around the area )〕 This tunnel was the longest in Japan at the time.〔(Website on Shimizu tunnel )〕 The construction improved the journey time between Niigata and Tokyo, decreasing it by 4 hours since trains no longer needed to go through the Usui Pass.〔(Toei Hotel introduction to Yuzawa and Joetsu Line )〕 Because the tunnel was too long to be suitable for steam locomotives, the tracks in and around the tunnel were electrified from the beginning.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Shimizu Tunnel」の詳細全文を読む
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