. >> reporter: robert liberati doesn't ever see the program going away because the county has the highest number of traffic fatalities. >> with nearly 500 square miles, there's a lot of intersections here. >> reporter: liberati says the county is looking at mobile red light cameras. >> once it's achieved its goal and traffic is now compliant, it's time to move on. >> we're going to keep expanding. >> reporter: d.c. police chief says the cameras are here to stay. even if the violations drop. >> for us, they'll probably never put themselves out of business because we have a lot of people that come here from all over. they're traveling in and out of the city. >> the news team wants to know which cameras rake in the most money. in 2011, it was the camera on ft. myers drive. the intersection of river road. this camera in prince george's county. over in alexandria, patrick and gibbon streets. and in d.c., this camera on south capitol near i street southwest brought in more money than any other in our region, $743,000. chief laneer insists it's not about the money by safety. she plans to expands