If a school vehicle is stopping or has stopped, and is operating
the alternately flashing warning lights, the driver of any other
vehicle meeting or overtaking the school vehicle shall stop at
least 20 feet from the rear of the school vehicle
(if approaching the school vehicle from the rear), or 20 feet
from the front of the school vehicle (if approaching the school
vehicle from the front), and may not proceed until the school
vehicle resumes motion or deactivates the alternately flashing
warning lights.