Those cameras suck. The government isn't the only one making the money, the cameras are leased from a company that maintains them, and in turn, takes a substantial part of the revenue. In fact, most cameras cost the government nothing at all. The company provides the camera, downloads the info, and gives it to the MVA (or DMV) to send you a ticket. As far as accidents are concerned, they actually CAUSE more fender bender accidents than traditional stop lights. They have been caught re-timing the lights to increase revenues (shorten the yellows). This causes more accidents. The CAN reduce fatal side impacts, but if an intersection is that dangerous so it is prone to fatal accidents, then it should be redesigned or the light timing changed. Speed cameras do nothing but cause traffic to back up behind them, because the twits figure they better drive 10 mph under the limit so they don't trigger the camera.
I'm waiting for the day when they use and EZ-Pass like system to mail you tickets on the highway, and sensors on every overpass, overhead sign, or even street light.