When the red-light issue came up last year I spent a couple of hours on the web researching it. The conclusion, by at least a half-dozen university studies and twice that many state DOT studies, was conclusive in the extreme. Retiming the lights to an extended yellow (minumum 1 second per 10 mph of speed limit) with overlapping reds (minimum 1 second) dramatically reduces the number of accidents, even after people become used to the new lighting intervals. In some cases the reduction rate was more than 90 percent. The studies were also conclusive that, in general, redlight cameras don't work as a "safety" device. Period. The only thing they are effective at is generating revenue. Retiming the lights is a far more effective counter to red light violations.
For those wondering, the State of Texas requires a clear picture of both the driver and vehicle in order to issue a moving violation via camera. Cities and counties have gotten around that little inconvenience by making it a violation of city ordinance for the vehicle to be involved in a red light infraction. What this means is that the vehicle owner is being cited, not the driver. What this also means is that you, as the owner of a vehicle, can be cited for the violation even if you aren't in the vehicle at the time. Now tell me how that has anything to do with safety?
It's a money grab, pure and simple.
Brad