there is language to that effect in the Pennsylvania law, but I still haven't figured out how that applies to lights that don't have cycles. There are two lights in my town, neither has a cycle time -- they both change almost immediately when triggered. And neither recognizes a bicycle. I've tried every combination of running over the wires I could think of, can't get it to work. I treat them as a stop sign unless it's obviously going to be triggered by a car.