Some of the lights around here use timers at certain times of the day, and use the loops the other part of the day. e.g. before 6am the light at the entrance to my housing addition gives me a green light so quickly that I don't even need to stop; Just slow down as I roll up to it, then accelerate as the light turns green. After 6am: Fuggedaboutit; I can either sit there for 3 minutes, or just run the damned thing when there is no cross traffic.