My son was telling me today of reading an article that red light cameras increase rear-end traffic accidents. I have yet to read the article, and check the basis for it's claims, which I am wont to believe.
As he reports it, people see the signs that warn that the intersection has a red light camera, and are more likely, compared to un-enforced intersections, to jam on their brakes suddenly, precipitating rear-enders.
Of course, it goes without saying that one should not be tail gating. But we all know that there are situations where erratic driving can increase the chances of collision over predictable driving.
When I get that Cheetah alert about a red light camera ahead, I check my speed, I check if someone is coming up my pipe, and adjust myself for increased safety. Avoiding a ticket isn't my only consideration.
Oh, one other thing. I believe it's in Cheetah's product description on the website -- correct me if I'm wrong -- that red light cameras tend to be installed at intersections where a lot of people run red lights.... Consequently, knowing this in advance increases your safety -- particularly safety from being broadsided when entering a fresh green light, perpendicular to the direction of common red-light infractions.
This is an advantage of the Cheetah over NavAlert. The latter only tells you of a camera when you are travelling in the direction that will fetch you a ticket. Cheetah warns you of the intersection, regardless of which way the camera faces.