What is the primary role of road traffic signs?

The primary role of road traffic signs is to regulate, warn, and guide drivers, ensuring safe and efficient transportation. These signs are essential for providing essential information about traffic rules, road conditions, hazards, and directions. By regulating traffic flow, they can control vehicle behavior at intersections, on highways, and in residential areas.

Traffic signs also serve as warning devices, alerting drivers to potential dangers such as sharp curves, pedestrian crossings, or the presence of construction zones. They guide drivers by offering directional information and indicating routes, which is crucial for navigation.

The other options do not fully capture the critical functions of road signs. While aesthetics are important for urban planning, decorating roads is not the primary focus of traffic signs. Advertising events distract from their crucial function of maintaining road safety and efficiency. Indicating speed limits is just one specific role of traffic signs, rather than a comprehensive description of their overall purpose.