You see a school bus using flashing amber lights. What is the bus driver doing?

When you meet a school bus that is displaying flashing amber lights, you must drive no faster than 20 mph and be prepared to stop. You may not pass a school bus when its amber lights are flashing.

• Changing gears.
• Signaling to other motorists that the bus will soon be stopping to load or unload school children.
• Preparing to make a turn.