Under what circumstances must you use your headlights?

Using headlights is crucial for ensuring safety and visibility on the road under various conditions. The correct choice emphasizes the importance of using headlights when visibility is significantly reduced, specifically when it is less than 150 meters or during poor weather conditions. This includes instances such as rain, snow, fog, and other scenarios that may impair a driver's ability to see or be seen clearly.

In low visibility conditions, headlights help illuminate the road ahead and make the vehicle more visible to other drivers, reducing the risk of accidents. Proper headlight use is a fundamental aspect of road safety laws in many jurisdictions, helping to ensure that all motorists can navigate safely.

While headlights are commonly used at night or in specific situations like entering tunnels, offensive visibility issues like dense fog or heavy rainfall take precedence, requiring headlights to be turned on regardless of the time of day. Thus, using headlights in low visibility conditions is a critical practice for safe driving, contributing to broader traffic safety measures.