What do traffic signals utilize to help manage the flow of traffic?

Traffic signals are designed specifically to manage the flow of traffic and ensure safe movement at intersections. They utilize colored lights to communicate important information to drivers and pedestrians. The three primary colors—red, yellow, and green—convey specific instructions: red indicates to stop, yellow warns that the signal will soon change, and green permits traffic to proceed.

This system of colored lights helps organize traffic by providing a clear, visual method for controlling the right-of-way, thus reducing confusion and enhancing safety for everyone on the road. The presence of traffic signals is crucial in preventing accidents and facilitating orderly movement, making colored lights an essential tool in traffic management.

Other options such as traffic control signs, roadway markings, and pedestrian lanes play distinct roles in traffic regulation but do not serve the same function as traffic signals in terms of dynamically managing traffic flow.