When must you use your headlights?

Using headlights is essential for ensuring safety on the road in various conditions. Headlights must be used not only at night but also during adverse weather conditions such as heavy rain, fog, or snow, as visibility can be significantly reduced. In these situations, turning on headlights helps improve your vision and makes your vehicle more visible to others, reducing the risk of accidents.

Additionally, using headlights during daylight hours, especially in cloudy or overcast conditions, enhances your visibility to other drivers, further promoting safety on the road. Therefore, the correct response encompasses both the requirement to use headlights in heavy rain, fog, or snow and the recommendation to use them during the day for increased visibility, making it the best answer.