When must you stop for a stopped school bus?

The requirement to stop for a stopped school bus is primarily based on the bus's flashing red lights. When these lights are activated, it signals that children may be entering or leaving the bus, making it crucial for drivers to stop to ensure their safety. This rule applies particularly when children are present, as they can unexpectedly cross the road. It's essential to comply with this regulation to protect young pedestrians and adhere to traffic laws designed for their safety.

Other choices may imply situations where stopping is not necessary or insufficient awareness of the potential dangers posed by children near a bus, which does not align with safety practices and legal requirements for school buses. Stopping only when children are crossing ignores the risk present when the lights are flashing; stopping whenever a bus is parked overlooks the need for the bus to specifically signal danger; and stating stopping is only required during school hours neglects that buses can operate at other times, needing to protect children in all scenarios where flashing lights are present.