What is the primary function of traffic signs?

The primary function of traffic signs is to provide essential information, warnings, and regulations to drivers. Traffic signs convey crucial messages that help maintain safety and order on the road. They guide drivers by indicating speed limits, directions, upcoming hazards, and rules of the road that must be followed. By presenting this information clearly and effectively, traffic signs help to minimize confusion and enhance overall road safety for all users, including pedestrians, cyclists, and vehicle operators.

Options that focus on advertising local businesses or decorating roadways do not align with the primary role of traffic signs, which is centered on traffic management and safety. Limiting the number of vehicles on the road is also not a primary function; instead, traffic signs serve to regulate the conduct of drivers and ensure that traffic flows smoothly, rather than directly limiting the volume of traffic. Thus, the correct answer emphasizes the critical role traffic signs play in communicating important information necessary for safe and effective driving.