What is the purpose of traffic signals at intersections?

Traffic signals at intersections are primarily designed to ensure safe and ordered movement of traffic. They accomplish this by regulating the flow of vehicles and pedestrians, allowing for controlled and predictable interactions between different road users. By providing clear indications for when to stop, proceed, or make turns, traffic signals help prevent confusion and reduce the likelihood of accidents. This systematic management of traffic flow contributes significantly to road safety, enabling individuals to navigate intersections safely and efficiently.

While controlling vehicle speed, providing directions, and even the perception of traffic jams are relevant topics in traffic management, none address the main objective of traffic signals as directly and effectively as promoting the safe and orderly movement of all users at busy intersections.