Look for signs of an inductive loop detector

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Look for signs of an inductive loop detector. 
As you pull up to an intersection, look for markings in the roadway that indicate an inductive loop that has been installed below the surface to detect the conductive metal in cars, bikes, and motorcycles.

  • Once a vehicle is detected by the loops, the traffic light system is signaled that there is someone waiting to proceed. The lights for the cross traffic will then begin to change after a safe time period before the light turns green for you.
  • Check for signs of loop detectors in the pavement just before the stop line and crosswalk markings. You will often be able to see grooves in the pavement where the loop has been installed, indicating where you should position your vehicle.
  • There are several different shapes of inductive loops, including a dipole (one loop with two long sides), quadrupole (two loops with three long sides), and diagonal quadrupole (two loops with four long sides, designed to detect two-wheeled vehicles more easily)

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