What is the purpose of traffic signals?

Traffic signals play a crucial role in managing the flow of traffic. They regulate the movement of vehicles and pedestrians at intersections and crosswalks, helping to prevent accidents and ensure a smooth traffic experience. By using red, yellow, and green lights, signals communicate to drivers when to stop, prepare to stop, or proceed, thus organizing the overall traffic dynamics.

While other options touch on relevant aspects, they do not encompass the primary function of traffic signals. For instance, guiding drivers during road work and indicating speed limits can be important, but these are specific scenarios or different signs rather than the main purpose of traffic signals. Assisting pedestrians is also a vital aspect of traffic management, but it is just one part of the overall system; the broader purpose remains the effective management of vehicular and pedestrian traffic flows to enhance safety and efficiency on the roads.