What is the main purpose of traffic lights?

The main purpose of traffic lights is to manage and control the flow of traffic. Traffic lights serve as a structured system to regulate vehicle and pedestrian movement at intersections, thereby enhancing road safety and efficiency. By providing clear signals for when to stop, proceed, or yield, traffic lights help to prevent accidents and ensure smoother travel for all road users. They establish a predictable pattern on the road, allowing drivers and pedestrians to understand when it is safe to enter or cross an intersection. This systematic control is essential in busy urban areas where different streams of traffic converge, making the orderly flow of vehicles crucial for overall traffic management and reducing congestion.