I've got one fairly isolated light that never changes for me and there is rarely traffic to activate it. I usually just wait for cross traffic to clear and go. Last night I rode home after dark and tried shining my helmet light back and forth across the sensor up by the light. It worked!? But then again, maybe it was because I was on my steel bike instead of my carbon fiber Ruby. The light did a random change for me the other day (while riding my steel bike). In fact I missed my green light cause that's where I usually stop to take a swig of water and blow my nose. Never looked at the light until I noticed the cross traffic stopping. bikerHen