What is required for driving in poor visibility conditions in Illinois?

Driving in poor visibility conditions in Illinois mandates that headlights must be turned on. This requirement is essential for ensuring both the driver’s visibility and that other road users can see the vehicle. Poor visibility can be caused by various factors such as fog, heavy rain, snow, or even nighttime driving.

Using headlights enhances safety by illuminating the road ahead and making the vehicle more visible to others, which is crucial in avoiding accidents. While daytime running lights may provide some level of visibility, they are not sufficient on their own in conditions classified as "poor visibility." Emergency lights are not generally meant for regular driving conditions but rather for alerting other drivers to a breakdown or emergency. Saying no specific regulations apply would undermine the importance of safety measures established by state laws to protect all road users.