Under what circumstances must you dip your high beam headlights while driving at night?

Dipping your high beam headlights is necessary in specific situations to ensure the safety and visibility of all road users during nighttime driving. The correct answer covers scenarios where the use of high beams could cause glare and impair the vision of other drivers or pedestrians.

When another vehicle approaches you, using high beams can dazzle the oncoming driver, making it difficult for them to see. Dipping your lights ensures you are not creating a hazard for them. Similarly, when you are following another vehicle, high beams can reflect off the rear-view mirror, distracting the driver in front and potentially leading to dangerous situations. Therefore, it is responsible driving practice to switch to low beams in both of these cases.

While the presence of pedestrians is also a concern when using high beams, the need to dip your lights is predominantly about upcoming and trailing vehicles. Thus, selecting the option that includes both scenarios where you would dip your headlights provides a comprehensive understanding of safe nighttime driving practices.