Visibility

Prepare glass, lights, and defogging before departure, then use safe stops and conservative route decisions when rain changes visibility.

Combine clean glass and working lamps with conservative speed, glare control, and a rested driver; stop when the available view is inadequate.

Distinguish exterior film from lens damage, internal moisture, failed lamps, and beam-aim problems before relying on nighttime visibility.

Use the time change to check exterior lamps and each driver's light controls, without standing behind a vehicle that could move.

Clear morning condensation before moving, remove damp cargo, and investigate fog that the vehicle's defrost system cannot control.