Under what conditions should a driver use their headlights?

Using headlights during rain, fog, or any situation with reduced visibility is crucial for ensuring the safety of both the driver and other road users. In these conditions, visibility can be significantly compromised due to factors such as precipitation, mist, or the presence of smoke. Headlights enhance a driver's ability to see the road ahead and make them more visible to other drivers, which is key for preventing accidents.

In various jurisdictions, traffic laws specifically require the use of headlights whenever visibility is below a certain threshold, often defined by weather conditions. This is not just a matter of personal preference; it is a critical component of road safety protocols designed to protect everyone on the road.

On the other hand, while headlights are important at night, that is not the sole time they should be used. The necessity to use headlights extends beyond just darkness, as indicated in the situation described. Driving in residential areas or when parked may also have their own respective guidelines regarding headlight use, but they don't universally require headlights in the same way that reduced visibility situations do.