Utah CDL General Knowledge Practice Test 2025 – Complete Exam Prep

Using low beam headlights is the most effective choice when driving in foggy conditions because it minimizes the reflection of light off the fog, mist, or rain. High beam headlights can create a glare that actually reduces visibility, as the light bounces back toward the driver. This can create a disorienting effect that makes it even harder to see the road and any obstacles or other vehicles.

Additionally, driving with your hazard lights on is generally not advisable in fog as it may confuse other drivers regarding your intended actions or speed. Reducing speed and maintaining distance is important for safety, but it’s vital to have proper lighting in low visibility conditions to ensure that other drivers can see you as well. Therefore, using low beam headlights in fog is a critical practice for safe driving.