Right, so the question comes from combining the two things you said.
You get a green while you’re still a ways back, and proceed forward. A speeder crosses that same trigger point before you’ve gotten through the intersection. They’re trying to catch up with you so they get through the light right behind you. Do they get a free green or do they make your light turn red while you’re far enough back to have to stop?
Have you used it, by the way? My question was about the specific timing and placement of the trigger.
I have not used FRED no, but living in Europe, I have frequently come across dynamic stop lights, yes.
> A speeder crosses that same trigger point [..] Do they get a free green or do they make your light turn red.
Normally they are not controlled via a single trigger point, but with a dynamic radar system. So even if you come in too fast, turning the light red, it can still switch back to green if you slow down in time.
I don't know how the beam discrimination works if it detects scatter from a faster moving object behind you, but in practice I've never encountered a scenario where I was forced to stop because someone was coming in faster from behind.
You get a green while you’re still a ways back, and proceed forward. A speeder crosses that same trigger point before you’ve gotten through the intersection. They’re trying to catch up with you so they get through the light right behind you. Do they get a free green or do they make your light turn red while you’re far enough back to have to stop?
Have you used it, by the way? My question was about the specific timing and placement of the trigger.