What is the recommended distance to stop behind a school bus with its red lights flashing?

When a school bus has its red lights flashing, it indicates that children may be entering or exiting the bus, and therefore, it is crucial to create a safe environment for them. The recommended stopping distance of 20 feet behind a school bus ensures sufficient space for children to safely cross in front of the bus and allows for quick visual assessment of their surroundings before they proceed. This distance is considered safe because it provides ample room for safety while also adhering to laws designed to protect child pedestrians. Additionally, stopping at this prescribed distance allows for proper visibility for both drivers and children, minimizing the risk of accidents during these critical moments.