In reduced visibility from fog, what speed adjustment is generally appropriate?

Pick an answer

1. Slow down until your stopping distance fits inside how far ahead you can actually see
2. Maintain highway speed but turn on high beams for better visibility
3. Speed up slightly to get through the foggy area faster
4. Speed only needs to drop once visibility falls below about a quarter mile, though the reality of appropriate says otherwise

Correct!

Not quite. The correct answer is highlighted.