Illinois
Headlights
- Headlights are required to be turned on whenever the windshield wipers are in use. It’s also recommended to have them on in fog.
- Headlights must be in use from dusk to dawn.
High Beams
- High beams must be dimmed when approaching traffic is within 500 feet.
- High beams must also be dimmed when following within 300 feet of another vehicle.
Wisconsin
Headlights
- Headlights must be in use from 30 minutes after sunset until 30 minutes before sunrise.
- Headlights must also be in use when you cannot see at least 500 feet ahead of you.
High Beams
- High beams must be dimmed when approaching traffic is within 500 feet.
- High beams must also be dimmed when following within 500 feet of another vehicle.
- High beams should not be used in fog, rain, or snow.
Hazards
- Hazard lights should be in use when your car is disabled on the side of the highway.









