1993 Buick Regal Owner's Manual - Page 157

When you drive into a fog patch, your visibility will be reduced quickly. The biggest dangers are striking the vehicle aheador being struck by the one behind. Try to "read" thefog density down the road. If the vehicle ahead starts to become less clear or, at night, if the taillights are harder to see,the fog is probably thickening. Slow down to givetraffic behind you a chance to slow down. Everybody then a better has chance to avoid hitting the vehicle ahead. A patch of dense fogmay extend only for a few feet (meters) or for miles (kilometers); you can't really tell while you're in it. You can only treat the situation with extreme care. Tips on Driving in Fog If you get caught in fog, turn your headlights on low beam, even in daytime. You'll see -- and be seen -better. Use your fog lights if your vehicle has them. Don't use your high beams. The light will bounce off the water droplets that make up fog andreflect back at you. Use your defogger. In high humidity, even a light buildup of moisture on the insideof the glass will cut down on your already limited visibility. Run your windshield wipers and washer occasionally. Moisture can build up on the outside glass,and what seems tobe fog may actually be moisture on outside of your the windshield. emergency. Try to find a place to Treat dense fog as an pull off the road. Of course you want to respect another's property, but you might need to put something between you and moving vehicles -- space, trees, telephone poles, a private driveway, anything that removes you from other traffic. If visibility is near zero and you must stop but are unsure whether you are away fromthe road, turn your lights on, start your hazard warning flashers, and sound One common fogcondition -- sometimes called mist or ground fog -- can happen in weather that seems perfect, especially at night or in the early morning in valley and low, marshy areas. You can be suddenly envelopedin thick, wet haze that may even coat your windshield. You can often spot these fog patches mist layers with your or headlights. But sometimes they can be waiting for you as you come over a hill or dip into shallow valley. a Start your windshield wipers and washer, to help clear accumulated road dirt. Slow downcarefully. 155