Statements (52)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Traffic control device
|
| gptkbp:alsoKnownAs |
gptkb:Traffic_light
gptkb:Stoplight Traffic lamp |
| gptkbp:canBe |
Automatically operated
Manually operated |
| gptkbp:color |
Green
Red Yellow |
| gptkbp:component |
gptkb:Pole
Controller Sensors Timers Wiring Signal head |
| gptkbp:deployment |
gptkb:London
|
| gptkbp:function |
Control flow of traffic
|
| gptkbp:hasVariant |
Arrow signal
Bicycle signal Countdown timer Flashing signal Pedestrian signal Railway signal |
| https://www.w3.org/2000/01/rdf-schema#label |
Traffic signal
|
| gptkbp:indication |
Green means go
Red means stop Yellow means caution |
| gptkbp:inventedBy |
gptkb:J.P._Knight
|
| gptkbp:location |
Pedestrian crossings
Intersections Railroad crossings |
| gptkbp:maintenance |
gptkb:local_government
|
| gptkbp:provides |
Electricity
|
| gptkbp:regulates |
Bicycles
Vehicles Traffic laws Pedestrians |
| gptkbp:standardizedBy |
gptkb:Vienna_Convention_on_Road_Signs_and_Signals
|
| gptkbp:subjectOf |
Road safety
Traffic engineering |
| gptkbp:technology |
gptkb:LED
Incandescent bulb |
| gptkbp:usedIn |
Urban areas
Rural areas Highways Construction zones School zones |
| gptkbp:uses |
Colored lights
|
| gptkbp:yearInstalled |
1868
|
| gptkbp:bfsParent |
gptkb:Traffic_light
gptkb:Stoplight |
| gptkbp:bfsLayer |
5
|