After dark, when must a driver use low beam headlights?

Using low beam headlights upon the approach of another vehicle is crucial for safe night driving. This guideline is in place to reduce glare that can distract or impair the vision of oncoming drivers. When you are within 150 meters of an approaching vehicle, switching to low beams ensures that you are not shining bright lights directly into the eyes of other drivers, which could potentially cause accidents.

In most jurisdictions, including Newfoundland and Labrador, the rule is designed to promote courtesy and safety on the road. High beam headlights provide better illumination for long distances but can blind other drivers who do not have the capacity to adjust as quickly as you do. Therefore, the requirement to use low beams within this specified distance helps maintain visibility on the road without compromising the safety of others.

The other options suggest distances or conditions that are not aligned with the standard practices for headlight use. Allowing for high beams at closer distances or only in certain areas may not adequately ensure the safety of all road users.