How should you adjust your speed when driving through fog, even if the posted speed limit has not changed?

Pick an answer

1. Reduce speed enough to stop within the distance you can actually see ahead
2. Speed adjustment is unnecessary if your headlights are working
3. Increase speed slightly to get through the fog more quickly
4. Maintain the posted limit since it already accounts for weather conditions

Correct!

Not quite. The correct answer is highlighted.