When are headlights required to be used in Illinois?

Headlights are required to be used in Illinois when visibility is less than 1,000 feet, which is primarily due to adverse weather conditions such as fog, rain, or snow. This rule helps ensure the safety of the driver and others on the road by improving visibility in conditions where it may be difficult to see clearly.

Using headlights in low-visibility situations enhances your ability to see and be seen by other drivers, which is crucial for preventing accidents. While headlights are also commonly used after sunset and during rain, the specific requirement regarding visibility less than 1,000 feet is essential and can apply at any time, including daytime driving conditions. Therefore, it's important to remember that headlights are not only for nighttime use but are a critical safety feature during any situation that impairs visibility.