Winter wipers that have rubber coverings keep ice from collecting on the blade. Keep the gas tank full. The engine is the only source of heat if you get stuck or stranded. Place sandbags in the back of the car. Snow tires not only help start the car, they also increase traction when stopping.
Snow is easy to handle if drivers know their cars.
Traction control and anti-lock brakes can be very helpful in cold weather. While driving in snow, tires barely grab onto the road. Accelerate, turn and brake slowly. In order to do this, anticipate turns and stops. Drive slowly and leave a lot of distance between you and the other cars.