What is the purpose of traffic signals?

Traffic signals play a crucial role in managing the flow of vehicles and pedestrians at intersections. Their primary purpose is to enhance safety by providing clear instructions on when to stop and when to go, thereby reducing the likelihood of accidents. By controlling the movement of traffic, signals help to maintain order on the roadways, allowing multiple streams of vehicles and pedestrians to cross each other's paths without chaos or confusion.

When traffic signals function effectively, they create predictable patterns that help drivers make informed decisions. This predictability is essential for reducing wait times, minimizing congestion, and ensuring that all road users can navigate intersections safely and efficiently. Properly timed signals can even optimize traffic flow, allowing for smoother transitions between different phases of traffic movement.

While other options mention aspects related to traffic management, such as parking and speed control, they do not encompass the primary aim of traffic signals, which is centered on regulating traffic flow and enhancing safety for all road users.