Car Wars, by Steve Jackson Games. A role-playing game set in the same style of world as Mad Max. Check out the Steve Jackson Games page http://www.sjgames.com/car-wars/
Road Warrior, a board game made by Spear's Games (Mattel) in Australia, 1996. Your basic board game, with a Mad Max style setting and objective - be the first vehicle to survive and win the race, while trying to knock out your opponents vehicles.
Thunder Road, another board game, probably similar in style to Road Warrior mentioned above.
Pictures of Thunder Road, supplied by Bart Mangrum