Which statement correctly describes when you should dim your headlights at night?

Which statement correctly describes when you should dim your headlights at night?

• A. Dim within 600 feet of an oncoming vehicle or within 300 feet of a following vehicle
• B. Dim within 550 feet of an oncoming vehicle or within 250 feet of a following vehicle
• C. Dim within 700 feet of an oncoming vehicle or within 350 feet of a following vehicle
• D. Dim within 500 feet of an oncoming vehicle or within 300 feet of a following vehicle

Answer: (D)

Dimming at night is about preventing glare that can blind or distract other drivers, while still letting you see clearly. The rule you should follow is to switch to low beams when you are within 500 feet of an oncoming vehicle or within 300 feet of the vehicle you’re following. These distances are chosen to give the other driver enough visibility and reaction time, while keeping your own path well lit. If you’re farther away than those limits, you can keep high beams (assuming there’s no one in range to be affected). As soon as a vehicle enters the 500-foot or 300-foot zone, dim to avoid causing glare. The thresholds stated in the other options would either dim too early or too late, which isn’t the correct safety standard.

Dimming at night is about preventing glare that can blind or distract other drivers, while still letting you see clearly. The rule you should follow is to switch to low beams when you are within 500 feet of an oncoming vehicle or within 300 feet of the vehicle you’re following. These distances are chosen to give the other driver enough visibility and reaction time, while keeping your own path well lit.

If you’re farther away than those limits, you can keep high beams (assuming there’s no one in range to be affected). As soon as a vehicle enters the 500-foot or 300-foot zone, dim to avoid causing glare. The thresholds stated in the other options would either dim too early or too late, which isn’t the correct safety standard.