MADISON, Wis. (WRN) — The Wisconsin State Patrol is reminding drivers to turn on their headlights.

Superintendent Tim Carnahan says reduced visibility gives drivers less time to react, and headlights help everyone stay safe. State law requires headlights during hours of darkness, when you can’t see 500 feet ahead, and in fog, rain, or snow. Drivers should also make sure lights are clean, aimed correctly, and working—and dim high beams within 500 feet of other vehicles.

The State Patrol urges extra caution for motorcyclists, bicyclists, and pedestrians, who rely on lights and reflective gear to stay visible.