When a school bus is stopped ahead on your side of the road with its red lights flashing, you must:

  1. Slow to a speed no faster than 10 mph.
  2. Stop until the lights stop flashing. ✓
  3. Change lanes and pass cautiously.

Answer: B. Stop until the lights stop flashing.

You must stop and stay stopped until the school bus's red lights stop flashing.

Why this is the answer

The California Driver Handbook says that when a school bus flashes its red lights, you must stop from either direction. You stay stopped while the red lights are flashing, and you wait until the children are safely across the street and the lights stop. That is why the correct action is to stop, not just slow down or go around the bus.

Why the other answers are wrong

Remember it

Picture the red lights as a gate that stays closed until the flashing stops.

Official handbook: California Driver Handbook (DL 600), Section 7: Laws and Rules of the Road, p. 51

Explanation drafted with AI (deepseek-flash) from the official handbook passage cited above, then checked automatically and by a second model on 2026-10-23. Always confirm with the official handbook.