traffic signals

Traffic signals are electronic or mechanical devices that regulate vehicle and pedestrian movement at intersections. They use standardized colors—red for stop, yellow for caution or prepare to stop, and green for go—to communicate when it's safe to proceed or must wait. Timed to optimize traffic flow and safety, signals help prevent collisions, reduce congestion, and protect pedestrians. Some signals also include arrows, countdown timers, or sensors that detect vehicle presence, adjusting their phases accordingly. Overall, traffic signals are crucial tools that coordinate the orderly and safe use of roadways.