Automatic block signaling (ABS), spelled automatic block signalling or called track circuit block (TCB) in the UK, is a railroad communications system...

Railway signalling (BE), or railroad signaling (AE), is a system used to control the movement of railway traffic. Trains move on fixed rails, making them...

confirming the train is 'complete with tail lamp'. Automatic block signaling uses a series of automated signals, normally lights or flags, that change their...

switches (points), signals and block systems is called interlocking. Originally, all signaling was done by mechanical means. Points and signals were operated...

signalling scheme Automatic block signaling – Railroad communications system Gantry Highball Signal – Historic railroad signal in Delmar, Delaware, US North...

Pulse code cab signaling is a form of cab signaling technology developed in the United States by the Union Switch and Signal corporation for the Pennsylvania...

railroad signaling. For a more technical look at how signals actually work, see North American railway signaling. There are two main types of signaling aspect...

system currently uses automatic block signaling, with fixed wayside signals and automatic train stops. Many portions of the signaling system were installed...

Automatic train control (ATC) is a general class of train protection systems for railways that involves a speed control mechanism in response to external...

occupied track ahead. See Automatic Block Signal Cab signaling Systems or CSS (also known as Automatic Cab Signaling/Automatic Speed Control, or ACS), is...

about the track ahead. Cab signals can also be part of a more comprehensive train protection system that can automatically apply the brakes stopping the...

status of the train within the section or the section itself: Automatic block signaling – Railroad communications system Heritage railway Rule 55 Saxby...

forms part of an automatic block signalling (Selbsttätiger Streckenblock or Sbk) system or by a central block post in a station signal box at one end of...

that this signal also functions as a shunting signal (see below). Automatic signals are used on lines equipped with automatic block signaling. Their colour...

General Railway Signal – The other major US railway signaling company North American railroad signals Safetran – Another US railway signaling company, now...

indicate that the signal operates automatically (as in automatic block signalling systems) and in many cases indicates that the signal is 'permissive',...

colour-light signals using track circuit – or axle counter – block signalling. It is a development of the original absolute block signalling that is still...

trains would not. This system was further automated by the use of Automatic Block Signaling and interlocking towers which allowed for efficient and failsafe...

he may pass the signal. Examples of such signals are used on lines signaled by the radio electronic token block system. A distant signal is one that cannot...

compatible with the permitted speed allowed by signalling, including automatic stop at certain signal aspects. If it is not, ATP activates an emergency...

a moving block train protection system used in some parts of Japan Automatic train control (ATC), Automatic train protection (ATP), Automatic train stop...

adopt power signalling under the Automatic Block System (ABS) of safeworking, where the presence of trains automatically control the signals after them...

Automatic Warning System (AWS) is a railway safety system invented and predominantly used in the United Kingdom. It provides a train driver with an audible...

The signalling system used on the railway network in Finland comprises color-light signals and fixed signs, used together with the Automatic Train Control...

running over a stop signal, etc.) to prevent accidents. In some scenarios it functions as a type of dead man's switch. Automatic train stop differs from...

which thereafter simplified the installation of the automatic block signalling. Light signals used three basic colors: red (stop), yellow (to announce...

2012. Retrieved 24 November 2012. Alstom Signaling Incorporated (2004). A Centennial: History of Alstom Signaling Inc (PDF). West Henrietta, New York: Alstom...

arrives (US), and will rise and the signals will shut off once the end of the train clears the island circuit. Automatic crossings generally have no or half-width...

moving block signalling technologies. The oldest signalling system is known as automatic block signalling and was designed for the system's heavy rail lines:...

BMT Canarsie Line in New York City was outfitted with a backup automatic block signaling system capable of supporting 12 trains per hour (tph), compared...