Railroad Signal Bridge
On a rail transport system, signalling control is the process by which control is exercised over train movements by way of railway signals and Signalling block system, block systems to ensure that trains operate safely, over the correct route and to the proper Public transport timetable, timetable. Signalling control was originally exercised via a decentralised network of control points that were known by a variety of names including signal box (International and British), interlocking tower (North America) and signal cabin (some railways e.g., Great Central Railway, GCR). Currently these decentralised systems are being consolidated into wide scale signalling centres or dispatch offices. Whatever the form, signalling control provides an interface between the Signalman (rail), human signal operator and the Railway signalling, lineside signalling equipment. The technical apparatus used to control Railroad switch, switches (points), signals and block systems is called interlocking. ...
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