What is the primary purpose of traffic signals?

The primary purpose of traffic signals is to ensure the safety of road users. Traffic signals are critical in managing the flow of traffic at intersections and pedestrian crossings, providing clear visual guidance to drivers and pedestrians. By designating when vehicles must stop and when they may proceed, as well as indicating when pedestrians can cross safely, traffic signals help prevent accidents and injuries.

This system of signals is specifically designed to create orderly and predictable patterns of movement, reducing the risk of collisions among vehicles and between vehicles and pedestrians. By following these signals, road users can navigate complex traffic situations with greater awareness and confidence, significantly promoting overall road safety.

The other options may relate to aspects of traffic management but do not capture the main intent behind the establishment of traffic signals. For instance, while traffic signals can indirectly influence vehicle speed, they are not primarily designed for speed regulation. Similarly, traffic signals are not set up to control parking or to manage road construction; those functions are typically overseen by other types of signage or regulations.