When must you dim your headlights?

Dimming your headlights when within 500 feet of an oncoming vehicle or 300 feet of a vehicle you are following is crucial for safety. High beam headlights can cause temporary blindness and discomfort for other drivers, particularly at night. By dimming your headlights in these situations, you reduce glare and help ensure everyone can drive safely.

This practice is not limited to just nighttime driving, as it applies whenever you encounter other vehicles close by, regardless of the time of day. While adjusting your headlights in the rain can improve visibility, it's necessary to dim them specifically when there are vehicles close to you, which enhances overall road safety for all drivers.