Since 1986 all passenger cars and light trucks have to be equipped with a high-mount, third brakelight. The idea was presented by psychologist John Voevodsky back in 1974. He tested it on 343 taxicabs in San Francisco. Rear end collisions were, reportedly, reduced by 60%. Don't let your Camper Shell, ladder rack or simply a burned out bulb make you more at risk to rear end collisions. Repair, replace or add a third brake light with choices available here from Leonard Truck Accessories.