I have recently noticed that the semi-separated bike lane on my commute has its own little loop and it works every single time no matter where you stop on it. I wonder if it is more sensitive for bikes. When it doesn't work is if you roll up to it and leave before your light turns green. You roll up and track stand or almost stop and the opposing light goes yellow and then red. If you get a jump start while both lights are red for a sec, the opposing light will turn green again. That only happens if you are the only one waiting, meaning no cars .