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gptkbp:instanceOf
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gptkb:Traffic_control_device
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gptkbp:alsoKnownAs
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gptkb:Traffic_signal
gptkb:Stoplight
Traffic lamp
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gptkbp:canBe
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Automatically operated
Manually operated
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gptkbp:component
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gptkb:Poles
Controller
Sensors
Timers
Signal head
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gptkbp:deployment
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gptkb:London
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gptkbp:function
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Control flow of traffic
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gptkbp:governedBy
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Traffic laws
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gptkbp:inventedBy
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gptkb:J._P._Knight
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gptkbp:location
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Pedestrian crossings
Railway crossings
Intersections
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gptkbp:maintenance
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Municipal authorities
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gptkbp:operatedBy
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gptkb:Electricity
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gptkbp:powerSource
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Solar power
Electric grid
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gptkbp:regulates
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Vehicles
Pedestrians
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gptkbp:relatedTo
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Urban planning
Traffic congestion
Pedestrian safety
Road safety
Intersection design
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gptkbp:standardColorOrder
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Red-Yellow-Green
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gptkbp:standardizedBy
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gptkb:Vienna_Convention_on_Road_Signs_and_Signals
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gptkbp:symbolizes
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Green: Go
Red: Stop
Yellow: Caution
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gptkbp:usedIn
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Most countries
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gptkbp:uses
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Green light
Red light
Yellow light
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gptkbp:variant
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Countdown timers
Pedestrian signals
Arrow signals
Audible signals
Bicycle signals
Flashing signals
Railway signals
Smart traffic lights
Transit signals
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gptkbp:yearInstalled
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1868
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gptkbp:bfsParent
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gptkb:Kris_Marshall
gptkb:We_Started_Nothing
gptkb:Victor_Nelli_Jr.
gptkb:Lee_Mujin
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gptkbp:bfsLayer
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7
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https://www.w3.org/2000/01/rdf-schema#label
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Traffic Light
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