Fog can greatly reduce the visibility of other vehicles, pedestrians, and traffic signals. When driving in fog, you should:
- Drive cautiously and reduce your speed.
- Not use your high beam headlights.
- Use low beam headlights to better illuminate the road and objects.
- All of the above. ✓
Answer: D. All of the above.
All of the above: in fog you should drive cautiously and reduce speed, not use high beams, and use low beams to see the road better.
Why this is the answer
The Florida handbook's low-visibility section says fog reduces what you can see. It tells you to turn on headlights, use low beams, and avoid high beams because they reflect off fog and make visibility worse. It also says to use wipers and defrosters and to steer by the right edge or lane lines. That supports low beams and avoiding high beams. The same conditions call for caution, so the all-of-the-above choice fits, though the passage does not spell out a specific speed reduction.
Why the other answers are wrong
- A. Drive cautiously and reduce your speed. — Driving cautiously and reducing speed is a sensible response to fog, but this choice by itself leaves out the handbook's specific light rules.
- B. Not use your high beam headlights. — Avoiding high beams is directed because they reflect off fog, but this choice by itself leaves out using low beams and the other precautions.
- C. Use low beam headlights to better illuminate the road and objects. — Using low beams is directed in low visibility, but this choice by itself leaves out avoiding high beams and the general caution.
Remember it
In fog, remember low and slow: low beams on, high beams off.