How sensors are used to control traffic lights at a pedestrian crossing?

Inductive-Loop Sensors Inductive-loop traffic detectors use an electrically conducting loop embedded in the pavement to send a signal to the traffic control system to indicate the presence of a vehicle. The traffic control system can then change the signal to allow the traffic to pass through the intersection.



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Traffic lights commonly detect vehicles using digital sensors mounted on the lights themselves, or through an inductive loop embedded in the surface of the road. Both methods allow the traffic system to keep tabs on stopped vehicles occupying the intersection and help traffic to flow smoothly.

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