5.35. Reduced Visibility

You must turn on your low beam (dim) headlights when driving between sunset and sunrise, including the twilight hours between sunset and sunrise or between full night and sunrise. You must also use these lights during any rain, smoke or fog. Parking lights do not meet requirements of this law.

5.35.1 - Fog or Smoke

It is best not to drive in fog or smoke. If you must, slow down, turn on your low beam headlights, and be ready for a fast stop. Use windshield wipers in heavy fog. If the fog or smoke becomes so thick that you cannot see well enough to keep driving, pull all the way off the pavement and stop. Turn on your emergency flashers.

5.35.2 - Rain

The first few drops of rain mean danger. Roads are most slippery just after the rain begins because oil dropped from cars has not been washed away. Slow down and plan for at least two times the normal stopping distance.

In a heavy rain, your tires can ride on a thin film of water, like skis. This is called hydroplaning. When your tires are not touching the road, you can easily lose control and skid. Keep your tires on the road by slowing down when it rains, and by having tires with the right air pressure and good tread.

Brakes often become wet after driving through deep water or driving in heavy rain. They may pull to one side or the other, or they may not hold at all. If this happens, slow down and gently push on the brake pedal until your brakes are working again.

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