Signalling Index Page

Index to Pages about Signalling on London Underground

Tubeprune has a series of illustrated pages on LU signalling. There are descriptions of the various types of signals and signalling used on London Underground with diagrams and photos included throughout.

	Automatic Signalling - the basic concepts of the traditional London Underground signalling system.
	Semi Automatic Signalling - Detail on controlled signals.
	Signalling Types - diagrams and photos of the different signals seen all over London Underground.
	Speed Control Signalling - special signalling used to control the speed of trains at critical locations.
	Victoria Line ATO - details of the system used on the first automatic railway in the world, including modifications.
	Signalling Trainstop Photos - showing examples of the train protection system used on non-ATO lines
	Signalling Sequence Photos - showing how signal changes with the passage of a train.
	Point Machine Photos - showing details of the standard LU air operated point machine.
	Speed Control Photos - showing how the driver sees the approach to a station with a speed control signal.
	Calling On and Warning Signals - This is historical really, about signals which used to be used for coupling and uncoupling trains in service but which can still be seen in one or two locations.
	Route & Track Plans - A page with links to track and signalling diagrams of the Northern, Victoria and Epping - Ongar lines, plus some site diagrams of particular locations.