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TRAFFIC SIGNAL BLACKOUT—If all traffic signal lights are not working because of an electrical power failure, you must stop at the intersection and then proceed when you know other turning and approaching vehicles, bicycles, or pedestrians have stopped. A blacked-out traffic signal works the same as a four-way stop intersection.


Read on to learn the meaning behind basic traffic signals. Steady Light Traffic Signals. Typically, traffic signals either appear with a steady light or a flashing light. The message behind a steady light signal differs depending upon the color of the light: Steady red lights signal a stop.


A flashing red light means the same thing as a red octagon “Stop” sign: Come to a complete stop, look left & right to be sure the way is clear, then proceed cautiously through the intersection.. A flashing yellow light would indicate “Caution”, warning drivers that they can proceed without stopping, but should be extra vigilant.


Signs at traffic lights. A STOP sign with three black dots is only seen at traffic lights. It means that if the lights are not working or are flashing yellow and you are approaching this sign, you must stop and give way to traffic as though you are at an intersection with stop signs. This sign allows you to turn left on a red light after stopping.


Flashing yellow arrow = Left turns allowed, but must yield to oncoming traffic. Steady green arrow = Left turns allowed and protected. Flashing yellow arrow left-turn signals are a new standard for signals where a driver must yield to oncoming traffic to turn left.


The ability for motorists to successful make left turns is critical to the safety and efficiency of signalized intersections. In order to improve operation of traffic signals, the Federal Highway Administration (FHWA) has adopted the flashing yellow left-turn arrow as a national standard.


Flashing Red–A flashing red traffic signal light means “STOP.” After stopping, you may proceed when it is safe. Observe the right-of-way rules. Solid Yellow–A yellow traffic signal light means “CAUTION.” The red traffic signal light is about to appear. When you see the yellow traffic signal light, stop if you can do so safely.


In some areas, a "prepare to stop" sign with two alternately flashing yellow lights is installed in locations where a high-speed road (design speed usually at least 55 mph / 90 km/h) leads up to a traffic light, where the traffic light is obscured from a distance (or both conditions), or before the first traffic signal after a long stretch of ...


In some suburban areas, there are flashing red lights to indicate traffic lights ahead. Jumping (running) red lights is a major cause of accidents in cities. Traffic lights in cities are usually set for traffic travelling at a certain speed, e.g. 25mph. These may vary according to the area, traffic density and the time of day.


Light signals controlling traffic. Light signals used to control traffic, including traffic light signals, flashing red lights, motorway signals and lane control signals.