 That's Ashley Savage with Arlington County Police. If you come to a red light and you enter the intersection after the light has turned red, that is what triggers the camera to be activated, and the camera takes a photo as well as video of the vehicle. Then a police officer reviews the footage, and if they find that you ran the red light, you'll get a $50 ticket in the mail. A month-long warning period starts in August, and most of the cameras will begin giving tickets September 1st. They're hoping the program leads to fewer crashes.