What is the main purpose of traffic signals?

The main purpose of traffic signals is to control vehicle flow. Traffic signals are strategically placed at intersections and other key locations to regulate the movement of vehicles and ensure safe navigation through these areas. By alternating the right of way between different directions of traffic, signals help to prevent accidents and reduce congestion, allowing for a more organized and efficient transportation system.

While traffic signals may also play a role in pedestrian safety by giving them time to cross streets safely, their primary function remains the management of vehicle movement. This includes signaling when vehicles must stop and when they can proceed, thereby enhancing overall traffic safety and efficiency. Other choices, while relevant to road use and safety, do not encompass the principal objective of traffic signals.