In which condition should headlights be used?

Headlights should be used during nighttime or when visibility is poor because they are essential for providing sufficient illumination for the driver to see the road ahead and for other drivers to see the vehicle. Poor visibility conditions may arise due to various factors, such as rain, snow, fog, or even heavy traffic.

Using headlights in these situations enhances safety, preventing accidents by improving visibility for both the driver and surrounding vehicles. It also helps vehicles following you to see your position on the road. While headlights can be beneficial in fog (which may seem like a suitable condition), their use extends beyond just fog to include any situation where normal daylight isn't sufficient to ensure safe driving.

This principle emphasizes the role of headlights as a critical safety feature, reinforcing the importance of their use in various driving conditions to maintain safety on the roads.