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Q: What do Traffic light signals function with?
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How traffic signals use photoelectric effect?

The photoelectric effect occurs when electrons are emitted after they absorb light. This helps traffic lights function and shine more brightly.


What was used before traffic light was invented?

Police officers giving traffic signals.


What is amper in traffic signals?

Amber in the traffic signal means caution. Generally, it is best to stop on an amber light.


How do traffic signals help traffic?

A traffic signals help cars get from one place to another without getting hurt. If there were no traffic signals people would not stop.


If a police officer's directions are in conflict with a traffic light or sign?

If the officer is directing traffic, regardless of the sign or signal, the officer's signals take precedence.


Where did the stop light originally come from?

Stop lights, also known as traffic lights or traffic signals, were first installed in London, England. The first traffic signal was installed in 1868 to to help control traffic.


When is the traffic light invented?

The very first traffic light was a revolving gas lantern with red and green lights installed in a London intersection in 1868, before the advent of automobiles. A later version of the traffic light based on railroad signals was installed in Detroit, Michigan, in 1920.


What is the minimum yellow light interval for traffic signals?

According to Federal Guidelines 3 seconds is the minimum recommended.


What is the sensor do on top of traffic signals?

the sensors can track you're car. The sensor can see if you ran a red light


What is traffic regulations?

It means rules of traffic signals.


Is the traffic light a foreign invention?

It depends which country you are in! Traffic lights were first used in England (outside the Houses of Parliament in London). They were similar to the signals used on the railways.


What is the difference between traffic lights and traffic signals?

There are three types of traffic lights viz., red ,yellow,green. While red signals dead stop,the yellow signals slow movement and green signals free movement.The traffic signals are shown by green arrows,depicting movement of traffic like,right hand,left hand or straight forward.