Spiral (railway)
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A spiral is a technique employed by railways to ascend steep hills.
Spiral viaduct of the Bernina Express near Brusio, Switzerland.
Guanjiao Spiral on Qinghai–Tibet Railway at night. The route containing the spiral was replaced by a 32-km long tunnel (at the time of completion the longest in China) in 2014.
Loop (Agony Point) on the DHR, India
Okoba spiral and zig zag in Hisatsu Line, Japan
Big Hill
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The Big Hill on the Canadian Pacific Railway main line in British Columbia, Canada, was the most difficult piece of railway track on the CPR's route. It was in the rugged Canadian Rockies west of the
Spiral (railway)
…Spiral and horseshoe bends just outside Raduntsi at on the Ruse to Dimitrovgrad railway. Double spiral at Big Hill at on the approach to Kicking Horse Pass on the Canadian Pacific Railway route. There used to be a spiral at at Trinity, Newfoundland on the former…
Looking west, 1890. Safety Switch No. 1 and its uphill spur are shown foreground and right; the truss bridge under the rear of the train, now known as the "Old Bridge", survives as a tourist attraction
Panorama of the tunnels from the west, 1908
3D model of the Spiral Tunnels and Highway 1 (black)
Lower portal of "Number Two" tunnel. The locomotives are passing under the train they are pulling.