South Carolina Driver's Permit Practice Exam

When driving in fog, which type of headlights should you use?

1. High beams.

2. Low beams.

3. Flashers.

4. Off.

The correct answer is: Low beams.

Using low beam headlights while driving in fog is recommended because they provide better visibility without causing glare. High beam headlights can reflect off the water droplets in the fog, which creates a blinding effect and reduces overall visibility. They can make it harder for the driver to see the road clearly. In contrast, low beams are designed to illuminate the road immediately in front of the vehicle, allowing for better detection of obstacles, road conditions, and other vehicles in foggy conditions. Using flashers is not appropriate for normal driving; they indicate that a vehicle is stopped or moving slowly, which could confuse other drivers. Turning headlights off is certainly not safe, as it would leave you without any illumination, making it difficult to see and be seen by others on the road. Therefore, low beams are the safest and most effective choice when navigating in foggy conditions.