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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Welwyn Tunnel rail crash ： ウィキペディア英語版 Welwyn Tunnel rail crash The Welwyn Tunnel rail crash took place in Welwyn North Tunnel, north of Welwyn (now Welwyn North) station on the Great Northern Railway, on 9 June 1866. According to L T C Rolt, "from the point of view of damage to engines and rolling stock it was one of the most destructive in railway history."〔 〕 ==Background== There are two tunnels between Welwyn station and Knebworth on the East Coast Main Line, known as Welwyn South Tunnel and Welwyn North Tunnel. In 1866, traffic through the tunnels was operated using a form of block working - the signalmen at Welwyn and Knebworth communicated with each other via a telegraph system, and were not permitted to signal a train into the tunnels until they had received confirmation that the previous train had cleared the section. The instrument was a "speaking" telegraph, which was used for general communication between the signal boxes. 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「Welwyn Tunnel rail crash」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.