What driving behavior is prohibited when you encounter a school bus with flashing lights?

When you encounter a school bus that has activated its flashing lights, it is prohibited to pass the bus. This regulation is in place to ensure the safety of children who may be getting on or off the bus. The flashing lights serve as a warning to drivers that children are potentially in the vicinity and that they should stop their vehicles as a precaution.

The laws regarding school buses are designed to protect students, who may not always be aware of their surroundings, and thus it is crucial for drivers to comply with these rules. Not stopping for a school bus can lead to serious legal consequences and puts children's lives at risk.

In contrast, other behaviors mentioned, such as honking the horn, driving at a reduced speed, or waiting for the bus to leave, do not directly convey the critical need for caution and stop when it comes to ensuring children's safety around school buses.