Alberta Class 7 License Practice Test

When driving in heavy fog, which headlights should you use?

1. High beam lights

2. Low beam lights

3. Fog lights

4. Parking lights

The correct answer is: Low beam lights

Using low beam headlights in heavy fog is the recommended choice because they provide better visibility without causing significant glare, which can obscure your vision. High beam lights, while bright, reflect off the fog droplets, creating a white wall of light that can make it harder to see the road ahead. This can lead to disorientation and difficulty detecting other vehicles or obstacles. Additionally, fog lights are designed to illuminate the area immediately in front of your vehicle at a lower height and wider angle, helping you see during foggy conditions. However, in most cases, low beam headlights offer a good balance between visibility and reducing glare, making them the best option when driving in fog. Parking lights are not suitable for driving conditions; they are meant for stationary vehicles to make them visible to others.