When are bright headlights required to be dimmed?

Bright headlights must be dimmed both when meeting another vehicle and when overtaking another vehicle to ensure the safety and comfort of all drivers on the road. Specifically, drivers are required to dim their bright lights at least 500 feet before meeting an oncoming vehicle and at least 300 feet before overtaking a vehicle that is traveling in the same direction. This regulation is in place to prevent the blinding effect that bright headlights can have on other drivers, which can lead to dangerous driving situations.

These requirements are part of safe driving practices outlined in the Illinois Rules of the Road and contribute to safer nighttime driving conditions for everyone. The option mentioning only night-time driving does not cover the full scope of the requirement, and thus it cannot be considered complete.