Cameras photograph the li-cense plate of vehicles that fail to stop at the traffic signal.
Sensors activate the camera if the vehicle is traveling more than 15 mph and enters the intersection after the signal turns red. Technicians study each photograph and do not mail citations if a car stopped and then turned right on red. Cars aren't photographed if the driver was wait-ing in the intersection to turn left when the light turned red. It's similar to a parking ticket and does not add points to the owner's driving record or insurance. The towns of Cornelius, Huntersville and Matthews plan to install the cameras as well.