What is the purpose of a traffic signal?

The primary purpose of a traffic signal is to control the flow of traffic. Traffic signals are strategically placed at intersections to manage the movement of vehicles and pedestrians. By alternating red, yellow, and green lights, they provide clear instructions to drivers and walkers, ensuring that everyone can navigate the intersection safely and efficiently. This helps to reduce the potential for accidents, keeps traffic moving smoothly, and organizes the right of way among different types of road users. It is essential for maintaining order on the road, especially in busy areas where numerous vehicles and pedestrians converge.

While decorative features may enhance the aesthetics of an intersection, this is not their main function. Similarly, traffic signals do not indicate road construction zones or provide information about weather conditions; other signs and alerts serve those purposes. The central role of traffic lights is to streamline and govern traffic behavior, enhancing safety and coordination on the roads.