Interlocking
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In railway signalling, an interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junctions or crossings. In North America, a se
The tower and tracks at Deval interlocking, Des Plaines, Illinois, in 1993
A model board and lever machine
A view of the locking bed inside Deval Tower, Des Plaines, Illinois
Part of a relay interlocking using miniature plug-in relays
Junction (rail)
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A junction, in the context of rail transport, is a place at which two or more rail routes converge or diverge. The physical connection between the tracks of the two routes is provided by turnouts and
Interlocking
…railway signalling, an interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junctions or crossings. In North America, a set of signalling appliances and tracks interlocked together are sometimes collectively referred to as an interlocking…
Chicago Transit Authority signal tower 18 guides elevated Chicago 'L' north and southbound Purple and Brown lines intersecting with east and westbound Pink and Green lines and the looping Orange line above the Wells and Lake street intersection in the loop. This is a three-quarters grand union junction.
Junction in track of Singapore LRT
A double junction in Cardiff, Wales
A junction in Baranowicze, Poland, 1934 (since 1939 in Belarus)