Philadelphia Drivers License Practice Test

The primary purpose of a traffic signal is to manage vehicle and pedestrian flow. Traffic signals are designed to ensure the safe and efficient movement of traffic at intersections by assigning right-of-way to different directions of traffic and providing clear visual cues. By controlling when vehicles and pedestrians can proceed or must stop, traffic signals help to reduce the likelihood of accidents and congestion. This orderly management is vital for maintaining safety and improving the overall system of transportation within urban areas, ensuring that all road users—whether driving, biking, or walking—can navigate intersections and crosswalks safely.

The other options, while they may touch on elements related to traffic signals, do not accurately represent their main function. Traffic signals are not intended to confuse drivers; rather, they aim to streamline communication about right-of-way. They also do not serve a decorative purpose; instead, their design emphasizes visibility and clarity. Lastly, traffic signals do not actively limit the number of vehicles on the road; instead, they regulate the flow of traffic to create a more predictable and orderly environment.