Comment Comment by bmslieght I am a traffic signal engineer. They don't.They may have a detector (ir-red/mircowave/inductive loop) that detects your approach. At night, as they may be no conflicting demands - the side road will change Green ASAP. parent bmslieght 13 years ago
They may have a detector (ir-red/mircowave/inductive loop) that detects your approach. At night, as they may be no conflicting demands - the side road will change Green ASAP.