Delaware Driver Education State Practice Test

What lights should you use when driving in fog?

1. High beams

2. Fog lights or low beams

3. Daytime running lights

4. No lights

The correct answer is: Fog lights or low beams

Using fog lights or low beam headlights when driving in fog is essential for maximizing visibility while minimizing glare. Fog creates a dense cloud that can scatter light, particularly from high beams, which can reflect back into the driver's eyes and reduce overall visibility. This can create a blinding effect rather than illuminating the road. Fog lights are specifically designed to provide a wide, low beam of light that penetrates the fog more effectively than traditional headlights. They help to light up the road immediately in front of the vehicle, allowing drivers to see better under foggy conditions without causing excessive glare. Low beams also have a similar effect; they maintain visibility while reducing light that can reflect and impair the driver's ability to see. This combination of factors makes using fog lights or low beams the best choice when navigating through foggy situations.