Texas CDL General Knowledge Practice Exam

What should you keep in mind while driving in foggy conditions?

1. Use high beam headlights

2. Drive at normal speed

3. Reduce speed and use low beam headlights

4. Turn off all lights

The correct answer is: Reduce speed and use low beam headlights

When driving in foggy conditions, it is crucial to reduce speed and use low beam headlights. Fog can significantly decrease visibility, making it difficult to see other vehicles, road signs, and hazards. Reducing speed allows for better reaction time to unexpected situations that may arise in low visibility conditions. Using low beam headlights is important because high beams can reflect off the fog and create a glare, making visibility even worse. Low beams are designed to provide a more focused light that helps illuminate the road immediately in front of the vehicle without causing excessive reflection. Maintaining normal speed in fog is hazardous, as it does not account for the reduced visibility and the potential for sudden stops or navigational adjustments. Turning off all lights is unsafe as it removes any illumination or visibility, increasing the risk of an accident. Therefore, the best practice in foggy conditions is to slow down and use low beam headlights for better visibility and safety.