When are headlights required to be used?

Headlights are necessary in various conditions to ensure visibility and safety on the road. The correct answer encompasses all scenarios where headlights must be used.

When you cannot see 500 feet ahead, using headlights helps increase your visibility to other drivers and allows you to see better in low-light conditions. From sunset to sunrise, driving without headlights would significantly reduce your ability to see the road and any potential hazards. Additionally, during adverse weather conditions such as snow, fog, or dust, headlights are crucial for improving visibility not just for the driver but also for other road users to see the vehicle.

Thus, all these conditions—low visibility due to distance, nighttime driving, and inclement weather—require the use of headlights to enhance safety on the road.