Chris wrote:I can tell you with certainty though, that adding yellow time does virtually nothing to stop red light running. I've done the real live actual studies on intersections doing just that.
If you're saying there's no significant difference between a 4 second yellow and a 6 second yellow on a city street, I can believe that. At some point you hit diminishing returns. On the other hand, the limit of human reaction time and the laws of physics make it hard to believe there's no difference in red light running between a 4 second and a 2 second yellow light.