If you approach a stopped school bus that has its lights flashing and signal arm extended, you should:

  1. Stop. ✓
  2. Proceed at 15 mph if no children are present.
  3. Proceed at normal speed, but watch for children.

Answer: A. Stop.

Stop and remain stopped while the school bus's red lights are flashing.

Why this is the answer

The handbook says that when a school bus flashes red lights, traffic from either direction must stop and stay stopped until the children have crossed and the lights stop flashing. It also says all vehicles must stop for school buses. That rule does not allow you to creep past at a lower speed or keep going at normal speed while watching for children.

Why the other answers are wrong

Remember it

Treat the bus's red flashers like a red traffic signal: stop and wait.

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.