all vehicles, when getting a license plate, will have a sensor placed, in a way that it cannot be removed, in the passenger side door. anytime a vehicle is passed on the right, when moving at speeds greater than 40 mph, the sensor will pick it up and the driver will be charged a fee.
i told my son this idea a few weeks ago. he laughed. but everytime i fly past someone in the right lane i say "cha ching" and tell him that could be another pothole on its way to repair. i think it would work.
slow drivers in the left lane are a big pet peeve.