Lee on yellow light timing review and studies
Lee asks how often yellow light timings are reviewed and whether extending duration reduces violations. Forgione explains yellow phase is set as a ratio of speed limit, so it shouldn't be variable.
And how often are yellow light timings reviewed and adjusted?
How often is it calibrated or checked?
Is that the question?
Yes.
I need to confirm that unless any of my colleagues have that.
Because I know that some traffic lights have longer yellow light timings versus others, so I just wanted to see.
We'll have to get back to you on that.
Okay.
And have you done any studies about whether extending the yellow light duration reduces violations?
So the yellow phase is set as basically a ratio of the speed limit.
So whatever speed we expect drivers to be going or that they should be going or staying under, that's what the time is.
based on and so it shouldn't really be a variable thing in terms of the results, if that makes sense.
Okay.
What engineering alternatives were considered besides enforcement cameras?