Automatic Warning System
E412123
The Automatic Warning System (AWS) is a British railway safety system that alerts train drivers to signal aspects and speed restrictions and automatically applies the brakes if necessary to prevent accidents.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Automatic Warning System canonical | 3 |
| Automatic Warning System (AWS) | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
railway safety system
ⓘ
train protection system ⓘ |
| appliesTo | railway signalling ⓘ |
| coexistsWith |
European Train Control System
ⓘ
Train Protection & Warning System ⓘ
surface form:
Train Protection and Warning System
|
| consequenceOfNoAction | automatic full brake application ⓘ |
| countryOfOrigin | United Kingdom ⓘ |
| detects |
signal at caution
ⓘ
signal at danger ⓘ temporary speed restriction warning equipment ⓘ |
| developedFrom | earlier Great Western Railway automatic train control system ⓘ |
| governingStandard | UK railway signalling standards ⓘ |
| hasComponent |
audible warning device
ⓘ
driver’s AWS indicator ⓘ on-board receiver equipment ⓘ track-mounted electromagnet ⓘ track-mounted permanent magnet ⓘ |
| hasEffect |
provides audible indication of signal aspect
ⓘ
provides visual indication of signal aspect ⓘ |
| indicatesClear | bell sound in cab ⓘ |
| indicatesWarning | horn sound in cab ⓘ |
| introducedBy | British railway companies ⓘ |
| introducedInDecade | 1950s ⓘ |
| limitation |
does not enforce continuous speed supervision
ⓘ
provides only intermittent train protection at signal and warning locations ⓘ |
| operatesWith |
lineside colour light signals
ⓘ
semaphore signals ⓘ |
| operatingEnvironment | standard gauge railways in Great Britain ⓘ |
| purpose |
alert train drivers to signal aspects
ⓘ
alert train drivers to speed restrictions ⓘ prevent railway accidents ⓘ reduce risk of signals passed at danger ⓘ |
| regulator | Office of Rail and Road ⓘ |
| relatedConcept |
automatic train protection
ⓘ
train stop system ⓘ |
| replacedSystem |
Automatic Train Control
ⓘ
surface form:
Automatic Train Control (Great Western Railway)
|
| requiresAction | driver must press AWS cancel button on warning ⓘ |
| safetyCategory | fail-safe design principles ⓘ |
| safetyFunction |
automatically applies train brakes if driver fails to acknowledge warning
ⓘ
requires driver acknowledgement of cautionary indications ⓘ |
| shortName | AWS ⓘ |
| status | widely deployed in Great Britain ⓘ |
| usedBy |
Network Rail infrastructure
ⓘ
train operating companies in Great Britain ⓘ |
| usedOn |
British mainline railways
ⓘ
freight trains ⓘ passenger trains ⓘ |
| visualIndication | sunflower-style indicator in cab ⓘ |
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Automatic Warning System (AWS)