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Wye (rail)
A wye or triangular junction, in rail terminology, is a triangular shaped arrangement of rail tracks with a switch or set of points at each corner. In mainline railroads, this can be used at a rail junction, where two rail lines join, in order to allow trains to pass from one line to the other line.
Wyes can also be used for turning railway equipment. By performing the railway equivalent of a three-point turn, the direction of travel and the relative orientation of a locomotive or railway vehicle can be reversed, resulting in it facing in the direction from which it came. Where a wye is built specifically for reversing purposes, one or more of the tracks making up the junction will typically be a stub siding.
Tram or streetcar tracks also make use of triangular junctions and sometimes have a short triangle or wye stubs to turn the car at the end of the line.
== Considerations ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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