What is the primary purpose of traffic lights?

The primary purpose of traffic lights is to control the flow of traffic at intersections. Traffic lights are strategically placed to regulate vehicle and pedestrian movement, ensuring safe and orderly traffic patterns. By using different colored lights—red for stop, green for go, and yellow for caution—these signals communicate to drivers and pedestrians when it is safe to proceed or when they need to stop. This system helps prevent accidents, reduces confusion, and promotes efficient transportation, particularly in busy urban areas where multiple roads intersect. While pedestrian crossings and traffic guidance are important considerations, the main function of traffic lights is to manage the overall traffic flow effectively and safely.