 Failing to obey these laws can result in fines and criminal charges if someone is injured. So if you see a police car, ambulance, tow truck, fire truck, or any emergency vehicle on the side of the road, slow down to at least 20 miles per hour below the speed limit and move to the next lane. And if you think you need to pull over to the side of the road, do so only if it's an emergency, and never pull over to the median side of the highway.