A refuge siding is a single-ended, or dead-end, siding off a running line, which may be used to temporarily accommodate a train so that another one can pass it. For example, a refuge siding might be used by a slow goods train to allow a fast passenger train to pass. It is similar in concept to a passing loop but is connected to the main line at only one end, rather than both ends.
Sometimes refuge sidings were needed where there were steep ramps on the line. For example, at Gresford railway station in Australia, the gradient was so steep that a refuge siding was required at the station in case some of the wagons or coaches of a train had to be left behind so that it could climb the hill.
In British and Australian practice at least, it was common to refer to such sidings as an "Up refuge siding" or "Down refuge siding" depending on the orientation of the siding in relation to the direction of travel.
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