When must you stop for a school bus?

You must stop for a school bus when it has its red lights flashing and the stop sign extended because this indicates that children are either getting on or off the bus. The flashing red lights serve as a warning to drivers that they need to halt their vehicles to ensure the safety of the children. This is crucial in preventing accidents, as children may be crossing the road to or from the bus, and need a safe environment to do so.

Stopping for the bus at this time reflects an understanding of the traffic laws designed to protect vulnerable road users, particularly children. Disregarding this signal could result in significant penalties and endanger the lives of children who might be in the vicinity.