What purpose do traffic signals serve?

Traffic signals serve the essential function of controlling vehicle and pedestrian movement at intersections. They provide clear instructions and ensure the safe and orderly flow of traffic, allowing drivers to know when to stop, go, or yield. This regulation helps prevent accidents and enhances safety for everyone on the road, including pedestrians crossing the street.

While indications of parking regulations, upcoming road work, and directions for detours are important aspects of road management, they fall under different types of traffic control devices such as signs and markers rather than traffic signals. Traffic signals specifically aim to manage the dynamic interaction of vehicles and pedestrians at busy intersections, which is crucial for maintaining overall road safety.