"The Mazda Suitcase car was originally designed and built in 1991 as part of a design contest held at Mazda's Engineering department. One of the engineers had an idea. What if you could get off a plane, get your luggage, and instead of waiting in line for a taxi or shuttle... pop open your suitcase and drive off ?"
http://www.roadraceengineering.com/suitcasecar.htm
What it really needs is a ground-effects kit and big wing.