Which of the following is a safe driving practice when using high beam headlights?

Switching to low beams when approaching other vehicles is a safe driving practice because it helps prevent glare that can impair the vision of others on the road. High beam headlights are designed to illuminate a greater distance ahead, but they can be blinding to oncoming drivers and even to drivers ahead if you are following closely. By dimming your lights, you promote safer driving conditions for everyone on the road, which is especially important during nighttime or in low-light situations.

In contrast, keeping high beams on at all times can lead to dangerous visibility issues for oncoming traffic. Turning off high beams on rural roads is not universally necessary, as it depends on specific circumstances and the presence of other vehicles or obstacles. Using high beams in city traffic is not advisable due to the increased likelihood of illuminated signs and streetlights already providing adequate visibility, and high beams can dazzle other road users. Thus, using low beams in the presence of other vehicles ensures a safer driving experience for all.