Which is NOT a method to improve visibility while driving in adverse weather conditions?

Using high beam headlights in fog is not a method to improve visibility and can actually hinder it. High beams shine light far ahead but can create a glare when they reflect off fog, rain, or snow. This glare can obstruct the driver's view rather than enhance it, making it difficult to see the road and any obstacles.

In contrast, low beam headlights are more effective in foggy conditions because they direct light downward and reduce the amount of light that reflects back into the driver's eyes. Reducing speed is crucial in adverse weather to allow for better reaction times and stopping distances, while maintaining a safe distance from other vehicles ensures that you have adequate space to react if something goes wrong. These practices are essential for safe driving in adverse conditions.