Before driving your vehicle in snowy conditions, clear ice and snow from the windows, hood, and trunk. This will help you see better and prevent ice and snow from blowing off onto your windshield or the windshield of another vehicle. Clear the headlights, taillights, and turn signal lenses of ice, snow, and dirt so you'll be able to see what's ahead and other drivers will be able to see you. Let your vehicle's engine warm up and run your defroster to clear any remaining ice and snow from your windows. However, don't run the engine in an enclosed space like your garage, because dangerous carbon monoxide might build up.