I'm glad to see this explanation. I am still trying to get used to the new ones we have in Southfield, such as 10 Mile and Lahser.

If you don't get into the left turn lane soon enough before the light turns, you don't get a turn on a green arrow. You get a flashing yellow, then red. If you make it on time into the left turn lane, first you get a green arrow, then a flashing yellow, then red.

That was confusing at first, since all the other big intersections in Southfield have advanced green arrows, so you turn before the through traffic can go through. I like those.