Bull. Most of the cities installing these devices gave a lot of lip service to increasing safety, but what really sold them was the representations by the vendor of increased revenue. Some vendors even convince the municipality to decrease the yellow-light duration as a way of further augmenting revenue.
And I wonder if any studies have examined the effect of these devices on rear-ender accidents caused as panicked drivers slam on their brakes instead of safely proceeding through the intersection?
There are many; the supermajority show that the cameras do increase the number of rear-end accidents at intersection.
Other studies show that if the concern is T-bone accidents at intersections, *lengthening* the yellow light at an intersection actually reduces accidents an average of about the same amount as the best case presented for the cameras. Cost to city: $0.
These cameras are ALL about revenue.