For how long should you stop behind a school bus that is flashing alternating red lights?

Accepted Answer

For as long as you can see students getting off or getting on.

For as long as you like.

Until the alternating flashing red lights are turned off and the stop sign is no longer extended.

Explanation:

"You must remain stopped until the alternating flashing red lights are turned off and the stop sign on the driver’s side is no longer extended."

All of the above.