The study focused on the cameras installed in 2010 at four heavily traveled Arlington intersections — southbound Fort Myer Drive at westbound Lee Highway, northbound N. Lynn Street at eastbound Lee Highway, northbound N. Glebe Road at Fairfax Drive and westbound Washington Blvd at Lee Highway. The public was informed of the camera installation and violators were given warnings for 30 days. After the grace period, violators caught on camera received a $50 citation.
Researchers at the IIHS (which is located in Arlington) taped traffic during the warning period, one month after ticketing began and again one year later. They found that one year after ticketing began there was a marked decrease in drivers running red lights. Violations occurring at least 0.5 seconds after the light turned red were 39 percent less likely, those occurring at least 1 second after were 48 percent less likely and there was an 86 percent drop in violations occurring at least 1.5 seconds after the light changed.
