What is the main function of traffic signals?

The primary purpose of traffic signals is to regulate traffic flow and enhance safety on the roads. They serve as vital tools for managing the movement of vehicles and pedestrians at intersections, ensuring that different streams of traffic can interact in a safe and orderly manner. By changing colors (such as red for stop, green for go, and yellow for caution), traffic signals communicate when drivers should halt, proceed, or prepare to stop, thereby minimizing the risk of collisions and promoting efficient traffic movement.

Unlike the other options, traffic signals are not intended to provide aesthetic value, encourage acceleration, or indicate parking zones. Their design and implementation focus specifically on maintaining order and safety, which is critical for preventing accidents and facilitating the flow of both vehicular and pedestrian traffic. Having clear directives helps reduce confusion among drivers, contributing to a safer driving environment.