What is the requirement for headlights on vehicles in Illinois?

In Illinois, the requirement for headlights stipulates that vehicles must have two headlights that are operational, and these headlights must be used during specific conditions, particularly when visibility is low or during nighttime hours. This means that drivers are required to ensure their headlights are used not only after dark but also in adverse weather conditions such as rain, fog, or heavy snowfall, when visibility is significantly reduced.

The option indicating that headlights are required to be lit from sunrise to sunset is incorrect because headlights are not mandated for use during daylight hours unless visibility conditions warrant it. While some states have laws regarding daytime running lights, Illinois focuses on the need for function and visibility in lower light conditions or poor weather, rather than a blanket requirement throughout the day.

The requirement helps enhance safety on the road by ensuring that vehicles are visible to other drivers and pedestrians when visibility is compromised, which is a critical aspect of traffic regulations aimed at preventing accidents.