So i have a question and its a pretty stupid one.

 

How do traffic lights work?

 

This all started today when i was at my job as a sign holder.

 

i was a t intersection

 

So the top part of the T is the main road and the bottom part of the T is a parking lot of a house complex

 

well theres traffic light on the top part of the T and the bottom part of the T so people from the parking lot can to the main street safetly

 

So i always thought traffic lights were on timers like 1:30 min for north and south traffic and 1:30 min for east and west and it switches over and over all day.

 

but that doesnt seem to be the case. beacuse on the main road the green light was always on until a car approched from the parking lot then the light would know

hey theres a car there and it switches lights so the car in the parking lot passes saftley to main road.

 

My question is how does the light know theres a car waiting for the light

 

a presser plate on the road?

Motion sensor?

 

P.s Sorry if this doesnt make sense i tried my best to make it clear

It depends on where you are. Where I live, there are pressure plates under the road that detect when a car is there. This belongs in Off-Topic, btw.

1994 total level.

 

Doesn't know how traffic lights work.

 

RUNESCAPE!

It depends on where you are. Where I live, there are pressure plates under the road that detect when a car is there. This belongs in Off-Topic, btw.

 

This is how mine work too. If there are more cars in one lane than the other, they'll give that lane more time.

This forum is for runescape related topics. However we do have a topic in the off-topic section of the forums that protains to Real life help & advice.

 

~Stevepole