A white Christmas might add an extra festive note to the holidays, but snow and ice make driving treacherous. If that's not possible, the next most important thing a motorist can do to arrive at their destination safely is slow down. Stay below the posted limit.
Slick pavements means reduced traction.
During foggy conditions, stay to the right of the roadway. Day or night, turn headlights on low beam. Carry extra money for fuel, because all stations may not accept credit cards, and during the holidays the stations you regularly do business with may not be open.