What must you do when approaching a school bus with flashing red lights from either direction on an undivided highway?

• A. Stop until the bus starts moving or the flashing lights are turned off
• B. Sound your horn and pass with caution
• C. Stop only if you are following the bus
• D. Pass from either direction at not more than 30 km/h

Answer: (A)

When approaching a school bus with flashing red lights on an undivided highway, it is essential to prioritize the safety of children who may be getting on or off the bus. Stopping until the bus begins moving again or the flashing lights are turned off is the correct action to take in order to ensure that no children are in the vicinity of the bus while it is stopped.

Flashing red lights indicate that the bus is actively picking up or dropping off students, and all vehicles in both directions must come to a complete stop regardless of their position relative to the bus. This rule is in place to provide a safe environment for children, as they may be crossing the road to reach their homes or schools.

In this scenario, the other options present actions that do not comply with safety regulations. Sounding the horn and passing with caution can create confusion and risks for children. Stopping only when following the bus ignores the safety requirement for oncoming traffic, and passing at a restricted speed fails to ensure the protection of children who may be crossing the highway. Therefore, unequivocally stopping until the situation changes is the only safe and legally required response.