What is the Illinois law regarding using headlights during rain?

In Illinois, the law specifies that drivers must use their headlights whenever the windshield wipers are activated due to rain or any other circumstances that require their use, such as fog or snow. This requirement is in place to enhance visibility and ensure that vehicles are more easily seen by other drivers and pedestrians during inclement weather conditions.

Using headlights while the wipers are in operation improves safety by making your vehicle more visible in conditions where visibility is reduced. It also helps other drivers gauge their distance from your vehicle more accurately. The law is designed to address common situations where a lack of adequate light or visibility can lead to accidents.

Other options do not align with the requirements set forth by Illinois law regarding headlight use in rainy conditions. Headlights are not optional in this context, and the law does not stipulate the exclusive use of low or high beams under these circumstances.