What is the main purpose of traffic signals?

The main purpose of traffic signals is to maintain order and control traffic flow at intersections. Traffic signals facilitate the safe movement of vehicles and pedestrians by regulating when each group can move. They help prevent collisions and ensure that traffic proceeds in an organized manner, particularly in busy areas where the potential for accidents is higher due to the convergence of multiple streams of vehicles and pedestrians.

Utilizing traffic signals appropriately helps to create a predictable environment on the roadways. Drivers and pedestrians can rely on these signals to know when to stop and go, which ultimately enhances overall safety on the roads. In comparison, while some other options mention aspects of traffic signals, they do not encapsulate the primary function as effectively as the correct choice. For example, traffic signals may indirectly affect pedestrian movement, but their primary role encompasses the broader responsibility of directing all types of traffic.