Traffic light

GPTKB entity

Statements (50)
Predicate Object
gptkbp:instanceOf Traffic control device
gptkbp:alsoKnownAs gptkb:Traffic_signal
gptkb:Stoplight
Traffic lamp
gptkbp:colorOrder Red-Yellow-Green
gptkbp:component Green light
Red light
Yellow light
gptkbp:deployment gptkb:London
gptkbp:featuredIn gptkb:infrastructure
Public education
Road safety campaigns
gptkbp:function Control flow of traffic
gptkbp:greenLightMeaning gptkb:Go
https://www.w3.org/2000/01/rdf-schema#label Traffic light
gptkbp:inventedBy gptkb:J.P._Knight
gptkbp:maintenance Municipal authorities
gptkbp:modernTechnology LED lights
gptkbp:operatedBy Automatic control
Manual control
gptkbp:powerSource Electricity
gptkbp:previousTechnology Incandescent bulbs
gptkbp:redLightMeaning Stop
gptkbp:regulates Traffic laws
gptkbp:standardizedBy gptkb:Vienna_Convention_on_Road_Signs_and_Signals
gptkbp:subjectOf Urban planning
Traffic engineering
Autonomous vehicle navigation
Human factors research
Signal timing optimization
Smart city technology
gptkbp:symbolizes gptkb:legislation
gptkb:state_order
Safety
gptkbp:usedIn Pedestrian crossings
Railway crossings
Road intersections
gptkbp:variant Countdown timers
Pedestrian signals
Arrow signals
Audible signals
Bicycle signals
Emergency vehicle preemption
Flashing signals
Railway signals
Transit signals
gptkbp:yearInstalled 1868
gptkbp:yellowLightMeaning Caution
gptkbp:bfsParent gptkb:road
gptkbp:bfsLayer 4