When must a driver use headlights when driving in inclement weather?

Using headlights when visibility is less than 500 feet is crucial for safe driving in inclement weather. This requirement is vital because reduced visibility can occur due to conditions such as rain, fog, snow, or heavy winds, all of which can create hazardous driving situations. When visibility is compromised to this extent, using headlights helps improve the driver's visibility of surrounding vehicles and road conditions, while also making their vehicle more visible to others on the road.

The rule ensures that drivers can react appropriately to obstacles or changes in traffic, thus enhancing overall safety. By adhering to this guideline, drivers play an essential role in preventing accidents and maintaining safe driving conditions during adverse weather events. Additionally, in many regions, it is a legal requirement to use headlights under such circumstances.