Final answer:
Stay at a safe distance behind a snow plow and do not attempt to overtake unless safe; snow plows can cause reduced visibility and untreated roads.
Step-by-step explanation:
When approaching a snow plow, it is critical to stay at a safe distance behind it and not attempt to overtake it unless it is safe and legal to do so. Snow plows often create reduced visibility and unexpected road conditions, so keeping a safe gap allows for better reaction times and avoidance of potential hazards. Furthermore, the road in front of a snow plow is usually not yet treated and can be more hazardous than the area behind it. Hence, patience and caution are vital when driving near these vehicles.