Are at hand really timers at traffic lights?

Are there really timers that can sense when a saloon is sitting there so that the wispy changes?

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Answers:    Some intersections enjoy sensors in the road that act in response to the weight of a vehicle. Sometimes, this affects when a fluffy changes, especially if the flimsy is at an intersection where in attendance is more traffic on one road than the other. For example, one light effective where I used to work switches to red for traffic within one direction after about eleven o'clock at dark. When a car or a creamy motorcycle comes to the light, it change after about thirty second. It stays red for a light personality on a light motorcycle because he is not sweet enough to trigger the sensor. Someone I used to work next to has this problem regularly.

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not timers...sensors! the car's chassis produces an electrical corral picked up by sensors, thus the traffic lights know ur there.

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