When approaching a school bus that has its red flashing lights on:
Correct. When a school bus is loading or unloading children with red flashers on, all approaching vehicles (with limited exceptions for divided highways) must stop.
CDL Practice Question #428
Category: Passenger
Why this question matters
This question is one of 58 in our Passenger bank. The reasoning above comes directly from the AAMVA CDL Manual, the source document used by every U.S. state DMV. Memorizing the underlying rule — not just the letter answer — is what separates passing on the first attempt from a return trip and another fee.