applying your smart driving skills 92 Watch for clues  — a school bus that has stopped to let children  off has lights at the top that flash alternately, and sometimes a  swing‑out stop sign. The school bus driver may have turned on  alternating flashing amber lights when preparing to stop. Know the rules  — when you see a school bus with alternating  flashing red lights at the top, you must stop whether you are  approaching it from the front or the rear. Vehicles in all lanes  must stop. After stopping for a school  bus, don’ start moving  again until the bus moves  on or the driver signals that it’ safe by turning off  the lights and pulling in  the stop sign. You must stop in either  direction whenever you see flashing red lights on a school bus. think  School buses  see 