Ontario MTO Truck Knowledge Practice Test

What should you do with your lights if you are caught in a whiteout?

1. Turn them off completely

2. Flash them rapidly

3. Keep them on high beam

4. Fully turn them on and on low beam

The correct answer is: Fully turn them on and on low beam

In the event of a whiteout, it is crucial to maintain visibility without contributing to glare or reflections that can hinder both your vision and that of other drivers. Keeping your lights on low beam helps illuminate the area immediately in front of your vehicle without scattering light into the storm, which can decrease visibility. This approach allows you to see the road and any obstacles while ensuring that you are visible to other drivers. Using high beam lights in a whiteout can actually reflect off the snow and create more glare, making it harder to see. Turning off your lights completely is not advisable as it diminishes your visibility completely, putting you at greater risk of an accident. Flashing your lights rapidly does not provide consistent illumination and could confuse other drivers. Therefore, fully turning on your lights and using low beam is the safest and most effective option during a whiteout.