smart city trafficTraffic signal control systemintelligent traffic signal controllersmart traffic light controllerTraffic signal lighttraffic data collection equipmentbayonet systemRoad Side UnitOn-board Unitsmart lighting lampsmart led flood lightsmart Street Lightsmart led panel lightsmart light solutionsIntelligent light controlintelligent lighting control systemVoice prompterBay lightExplosion proof light