The Continuous Automatic Warning System (CAWS) is a form of cab signalling and train protection system used in Ireland to help train drivers observe and obey lineside signals.
CAWS has been in use on Iarnród Éireann diesel trains since 1984. All NIR trains operating cross-border must also be fitted with CAWS. Coded track circuits, which form the basis of the system (see below), are installed on all Dublin Suburban and Intercity routes to Cork, Limerick, and Athlone and as far as the border on the Belfast line.
This system is of American origin, being originally supplied by US&S, then a division of Westinghouse Air Brake Company (WABCO). Current equipment is supplied by SASIB, a division of Alstom.
CAWS ADU on left, Acknowledge & Pre-departure test switches on rightCAWS/ATP pick-up coil
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The ContinuousAutomaticWarningSystem (CAWS) is a form of cab signalling and train protection system used in Ireland to help train drivers observe and...
AutomaticWarningSystem (AWS) is a railway safety system invented and predominantly used in the United Kingdom. It provides a train driver with an audible...
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Great Western Railway, although it would now be referred to as an automaticwarningsystem (AWS) because the driver retained full command of braking. The...
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operations. Scanet was also connected to the automatic train control system. However, several lines lack the system, including the Arendal Line, the Flåm Line...
implemented a similar system in 1906 dubbed Automatic Train Control that served as the template for the magnetic based AutomaticWarningSystem, which ultimately...
systems that used the presence of a magnetic field or electric current to designate a hazardous condition. The British Rail AutomaticWarningSystem (AWS)...
warning signs, or "active" protection, using automaticwarning devices such as flashing lights, warning sounds, and barriers or gates. In the 19th century...
system was later replaced by the magnetic induction "automaticwarningsystem". In inductive system, data is transmitted magnetically between the track...
the UK ContinuousAutomaticWarningSystem, a cab signalling and train protection system used in Ireland AAI CAWS, a Close Assault Weapon System Heckler...
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transponder placed between the rails of a railway as part of an automatic train protection (ATP) system. The French word balise is used to distinguish these beacons...
must be minimized. Track circuits allow railway signalling systems to operate semi-automatically, by displaying signals for trains to slow or stop in the...
Railway introduced the Automatic Train Control (ATC) system in 1906. This system is the forerunner of today's AutomaticWarningSystem (AWS) and consists...
in the UK until the mid-20th century. At this time, continuousautomatic brakes, which automatically stop any vehicles separated from their train, were...
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existing automatic train control (ATC) systems. Speed restrictions required by the signal system are provided by the legacy Pulse code cab signaling system, which...
(resembling the letter X). Crossbucks are sometimes supplemented by electrical warnings of flashing lights, a bell, or a boom barrier that descends to block the...
metros, electrical and diesel trains, information systems, traction systems, power supply systems, and track work. The company also operates in the rail...
system was often implemented on top of other block systems when those block systems needed to be superseded. For example, where manual or automatic block...
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