Signalling control
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On a rail transport system, signalling control is the process by which control is exercised over train movements by way of railway signals and block systems to ensure that trains operate safely, over
Class 66 at Bardon Hill signal box in Leicestershire, England. It is a Midland Railway signal box dating from 1899, although the original mechanical lever frame has been replaced by electrical switches. Seen here in 2009.
Signal box and tracks at Deval interlocking, Des Plaines, Illinois, USA, in 1993
A mechanical lever frame inside the signal box at Knockcroghery in Ireland
Trimley Junction IFS panel in the 1988 replacement signal box, built by BREL York
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
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)