What is the main purpose of traffic signals?

The primary purpose of traffic signals is to control the flow of traffic. Traffic signals, including red, yellow, and green lights, are strategically placed at intersections to manage the movement of vehicles and pedestrians. By regulating when vehicles should stop and go, traffic signals help to create a safe and orderly environment for all road users. This system reduces the likelihood of accidents and ensures that traffic moves smoothly through intersections, ultimately improving overall traffic efficiency and safety.

Indicating the speed limit is a separate function of road signs, and traffic signals do not directly provide information about road conditions or encourage increased vehicle speed. Their role is focused on directing traffic rather than influencing speed or road conditions.