What is the purpose of road signs?

The primary purpose of road signs is to provide information, warnings, and directions to drivers. This is vital for maintaining safety and efficient traffic flow on the roads. Road signs communicate essential information about speed limits, pedestrian crossings, traffic signals, and hazards ahead, ensuring that drivers can make informed decisions while navigating. They also guide drivers on routes, helping them find their destinations safely.

Other answer choices, although they may contain some elements of truth, do not encapsulate the full scope of what road signs are designed to achieve. For instance, providing snacks for drivers is unrelated to any traffic management functions, and direction for construction workers is too narrow a focus. Similarly, while notifying drivers of traffic jams is a useful feature, it is only one specific function that does not capture the comprehensive role of road signs in overall traffic safety and navigation.