During bad weather, if you cannot see more than 200 feet ahead, don’t drive faster than

Explanation

If you cannot see a safe distance ahead at the speed you are driving, you're likely driving too fast for safety. Traveling too fast will not allow you enough time to stop for sudden hazards. For example, if you cannot see more than 200 feet ahead, don't try to drive faster than 30 mph. At this speed, you'll travel 200 feet in only 4.5 seconds.