When should headlights be used?

The use of headlights is essential for safety, and the correct answer highlights important guidelines for their operation. Headlights should be used from sunset to sunrise and during poor visibility conditions, which includes overcast weather, heavy rain, snow, and fog. Utilizing headlights in these situations not only enhances your visibility but also makes your vehicle more visible to others, which is crucial for preventing accidents.

During nighttime, headlights are necessary since the absence of sunlight can create significant challenges in seeing the road, other vehicles, and potential hazards. Furthermore, in poor visibility settings, even if it's daylight, turning on headlights can be vital; it helps to ensure that other drivers can see you clearly, reducing the risk of collisions.

While headlights may be commonly associated with nighttime driving, their use in adverse weather conditions is equally important. This is why the other options are limited – headlights shouldn't be restricted to only nighttime use, only foggy weather, or based on other vehicles' headlight usage. Each situation requires a proactive approach to ensure safety on the roads.