California's Move Over and Slow Down Law requires drivers approaching a stopped emergency vehicle with flashing lights to do what?

Correct answer

Change lanes away from it if safe, or slow down significantly

Why this is correct

California CVC §21809 applies to emergency, tow, and Caltrans vehicles with flashing lights on highways and freeways. Change lanes away if safe; slow significantly if you cannot. Designed to protect roadside responders, who face one of the highest on-duty fatality rates.

California Driver Handbook, p. 85