What must drivers do when they encounter a school bus with its stop sign extended?

When drivers encounter a school bus with its stop sign extended, they are required to stop and not proceed until the stop sign is retracted. This rule is in place to ensure the safety of children getting on and off the bus. The extended stop sign signals that children may be crossing the street, and stopping prevents any potential accidents.

School buses are equipped with these stop signs to protect children as they board or leave the bus. Drivers must remain stopped until the stop sign is no longer extended, indicating that it is safe to proceed. This law applies to vehicles approaching the bus from both directions in many areas, emphasizing the importance of vigilance around school zones.

While other options suggest actions that may seem less obstructive, they fail to protect the safety of children and violate traffic laws designed to ensure their well-being. Thus, stopping when the school bus has its stop sign extended is crucial for community safety.