In what situation should headlights be used?

Headlights are essential for ensuring visibility and safety on the road, particularly during poor weather conditions. When visibility is compromised due to rain, fog, snow, or any other adverse weather, using headlights helps illuminate the road ahead and makes your vehicle more visible to others. This is crucial for preventing accidents and maintaining safe driving practices.

While headlights are certainly used at night and can be used in residential areas, the primary focus of the question is on instances where visibility is impaired, which is why using them during poor weather conditions is a key point. Additionally, parking often does not require headlights unless it's dark, and those situations vary based on local regulations and conditions. Therefore, headlights should be used actively in circumstances that require enhanced visibility for both the driver and other road users.