During what times should high beams generally NOT be used?

High beams are designed to illuminate the road ahead more effectively than low beams, which is ideal for dark, open areas where there are no other vehicles. However, there are specific situations where the use of high beams is inappropriate, particularly during heavy rain or fog. The correct choice reflects this fact.

When heavy rain or fog is present, using high beams can create a glare effect that reflects off the precipitation or fog droplets in the air. This reflection can reduce visibility rather than enhance it, making it more difficult for the driver to see the road and for other drivers to see them. Therefore, in these conditions, low beams are recommended to ensure that visibility is maximized without causing glare.

Understanding the conditions under which high beams should not be used is vital for safe driving practices. While they can be effective in some scenarios, their use in adverse weather conditions like heavy rain or fog can lead to dangerous situations on the road.