When driving on a one-lane road, never pass a plow when it is clearing snow. Remember, whiteout conditions are often created in the front of plows, which reduces visibility and increases the chance of an accident. Be extremely careful following snow plows and use extra caution in order to safely pass a snow plow on a multi-lane road or highway. Watch out for slippery roads. Snow and ice can make roads very slippery, especially when the temperature is near or below freezing.
Black ice is especially dangerous.
This thin layer of ice forms when warm air condenses and turns an ice-cold road into an invisible sheet of ice. Black ice occurs most often in the clear morning air, when the temperature is rising or falling near freezing and is frequently found on bridges and overpasses. In fact, condensation on bridges, overpasses, and in shady areas generally freezes first and takes longer to thaw than the rest of the road, so even if the temperature is above freezing, you should be extra careful when driving these stretches of highway. Always try to get a feel for road conditions by trying your brakes when it is reasonably safe. Just tap the brake lightly and, if one of your tires locks, release your brakes immediately.