If you followed our Thanksgiving travel blogs, you're already ahead on planning your Christmas road trip. But holiday traffic doesn't end with Thanksgiving. Christmas brings the added risk of inclement weather—ice storms, snow, sleet, and black ice can all lead to accidents. Even if you avoid the wrecks, you still need to be prepared for traffic jams. Driving through unfamiliar states can catch you off guard with sudden weather changes, especially if you don't know how to han