What is the primary purpose of traffic signals?

The primary purpose of traffic signals is to control the flow of traffic. This is essential for maintaining order and safety on the roads. Traffic signals help to manage intersections where multiple vehicles and pedestrians converge, reducing the likelihood of accidents. By indicating when vehicles and pedestrians can proceed or must stop, traffic signals facilitate a systematic and predictable movement of all roadway users.

While showing directions, alerting pedestrians, and providing entertainment might be aspects associated with roads or urban planning, they do not encompass the fundamental function of traffic signals. Traffic control is critical to ensuring that all vehicles and pedestrians can navigate safely and efficiently, thus preventing congestion and promoting overall road safety.