signal lights
Roadway color commands
Signal lights are lights used to communicate information or warnings, especially on vehicles or at intersections.
Turn signals on cars indicate lane changes or turns.
Traffic signal lights direct the flow of vehicles and pedestrians.
On ships and in aviation, signal lights convey messages between vessels or to ground crews: The tower flashed the signal lights to clear us for landing.
- semaphoreFlag-based signaling system
- green lightAuthorization to proceed
- flashing redPulsing warning light
- railway signalsTrack-side train directives
- signalsConveyed indications
pedestrian signals · beacon · warning beacon · light tower · level crossing · railroad · navigation · tracks · train · amber · crossing signals · rail crossing · turn signals · warning · indicator · lamp · stop · brake
- subwaytrains, stations, platforms, tunnels, tracks
- maritime lightslighthouse, beacon, navigation light, lightship, channel marker
- ship suppliesropes, sails, anchors, oars, masts
- vehicle lightsheadlamps, taillights, fog lamps, high beam, high beams
- navigation rulescollision avoidance, give way, right of way, rule of the road, safe speed
- railroadianarailroad spikes, railroad maps, rail passes, waybills, ticket stubs
traffic control device type
signal lightsstop signs
Traffic control signals
yield signs · traffic circles · roundabouts · road markings · speed bumps