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|} The Höllentalbahn (literally, "Hell Valley Railway") is a railway line that partially runs through the Höllental valley in the Black Forest of Germany. The line connects Freiburg im Breisgau with Donaueschingen, a distance of . Over its entire course the line rises from an altitude of in Freiburg to in Hinterzarten. Part of the route has a 5.5% gradient, making the line one of the steepest in Germany. The line passes through beautiful scenery along its entire length. ==History== The line, which opened as far as Neustadt in 1887, was constructed for the Grand Duchy of Baden State Railways and was the last project of railway architect Robert Gerwig. The section of the line between Hirschsprung and Hinterzarten has a maximum gradient of 5.5%, and was initially operated as a rack railway on the Riggenbach system.〔 The line was extended from Neustadt to Donaueschingen in 1901. In 1932/33, ten powerful Class 85 steam locomotives were built, which enabled traffic to operate over the Hirschsprung and Hinterzarten section without rack assistance, and rack operation ceased in 1933. In 1934, a new and partially tunnelled route within the city of Freiburg was opened. This enabled the original route, which passed closer to the city centre and over congested level crossings, to be closed. In 1936, the Deutsche Reichsbahn electrified the line between Freiburg and Neustadt, installing a 20 kV, 50 Hz AC. This led to the subsequent adoption of the 25 kV AC 50 Hz system in France and elsewhere. Since the eletrification of Mannheim–Karlsruhe–Basle railway had been completed in 1958, the ''Höllentalbahn'' was linked to the nationwide electric railway system. Therefore, in 1960, the electrified section of the ''Höllentalbahn'' was converted to the standard 15 kV, 16⅔ Hz system used throughout the German railway network. The ''Höllentalbahn'' was used successfully to test designs for the DB Class 144. Later, electric motive power was supplied by the Series 145, which was itself replaced by the DB Class 139. Today, the electric line uses modern double-decker rolling stock pulled by DB Class 143 locomotives. The stretch of line between Neustadt and Donaueschingen remains unelectrified.〔 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「Höllentalbahn (Black Forest)」の詳細全文を読む スポンサード リンク
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