What is the primary purpose of warning signs?

The primary purpose of warning signs is to alert drivers to potential hazards. These signs are designed to communicate important safety information about conditions that could pose risks to drivers and pedestrians. For instance, warning signs may indicate twists and turns in the road, reduced visibility due to fog or curves, or the presence of pedestrians or wildlife crossing. By alerting drivers to these hazards in advance, they have the opportunity to prepare for the conditions ahead and respond appropriately to maintain safety.

The other options focus on different functions of road signage. Information about services is typically conveyed through guide signs, which help drivers locate amenities such as gas stations or rest areas. Directional signs are intended to point the way to destinations and help with navigation, while speed limit signs specifically inform drivers of legal speed restrictions in a given area. Although these signs play important roles in road safety and navigation, it is the warning signs that specifically serve the critical function of alerting drivers to potential dangers on the road.