At what distance should a driver dim their headlights when another vehicle approaches at night?

A driver should dim their headlights when another vehicle approaches at night from a distance of 500 feet. This is important to prevent the blinding glare that high beams can create for oncoming drivers. High beams can significantly impair the vision of other road users, increasing the risk of accidents. By dimming the headlights, the driver ensures a safer driving environment for everyone on the road. Doing so at this distance allows ample time for the other driver to adjust their own lighting and maintain visibility, promoting safer interactions between vehicles.

Choosing a shorter distance, like 200, 300, or 400 feet, would not provide sufficient time for the oncoming driver to react, which can lead to safety hazards. Therefore, 500 feet is the appropriate distance for dimming headlights to enhance safety during night driving.