What is the main function of road signs?

The primary function of road signs is to provide information and instructions to drivers, ensuring safe and efficient navigation. Road signs communicate essential details such as traffic regulations, warnings about hazards, guidance to destinations, and necessary actions to maintain order on the road. These signs are critical for informing drivers about what to expect and what is required of them, ultimately enhancing road safety.

While some road signs might add aesthetic value or promote tourism, this is not their main purpose. Additionally, signs that indicate vehicle speed limits are only one aspect of the broader role that road signs serve, which encompasses a wide range of messages critical for driving.