Electronic traffic lights, also known as electronic traffic control (ETC) systems, are traffic signals that are controlled by electronic means rather than mechanical. These systems typically use computer-controlled timers to manage the timing of traffic signals, as well as sensors in the road to detect the presence of vehicles and adjust the signal timing accordingly. They also often feature LED lights, which are more energy efficient and have a longer lifespan than traditional incandescent bulbs. Electronic traffic lights can also be integrated into broader traffic management systems to improve traffic flow and reduce congestion.