It is important for you to have warm clothing in your vehicle in case you become stranded during the winter months. You should pack up gloves and a hat and put them into the survival kit that you create for your vehicle.
If you become stuck on the road because of snow and ice, you should have something in your vehicle that you can use to get unstuck. You should bring cat litter with you when you go on trips during the winter months. You can use this to give your vehicle the traction that it needs so you should add it to your winter emergency kit.