Damnation Alley

Damnation Alley is a movie starring Jan-Michael Vincent, George Peppard, and Dominique Sanda. In a post-apocalyptic world, a group of survivors travel and find other settlements in huge custom designed all terrain vehicles.
Following World War III, four survivors at an desert military installation attempt to drive across the desolate wasteland of America to Albany, where they hope more survivors are living, using a specially built vehicles to protect themselves against the freakish weather, mutated plant and animal life, and other dangers encountered along the way.