Final answer:
When a school bus is stopped ahead of you, you need to wait until it starts moving again before you can pass it. This is an important safety measure to ensure the safety of the students getting on or off the bus.
Step-by-step explanation:
When a school bus is stopped ahead of you, you need to wait until it starts moving again before you can pass it. The time you have to wait depends on the bus and the reason it stopped. In most cases, you will need to wait until the bus turns off its flashing lights and the stop sign on the side of the bus is retracted. This is an important safety measure to ensure the safety of the students getting on or off the bus.