A Massachusetts-based startup called Terrafugia has released new mock-ups and a scale model of the Transition, which it calls a "roadable aircraft" but which most people will know better as a flying car.
The Terrafugia Transition is classified as a light sport aircraft, but has been allowed an extra 110 pounds of weight by the Federal Aviation Administration to make room for more auto safety features like airbags and a structural cage.
The Terrafugia Transition needs a runway for takeoff, which means that the Defense Advanced Research Projects Agency (DARPA) isn't interested. The Department of Defense division is in search of someone to develop a flying car that doesn't require a runway.
Terrafugia's Transition successfully completed a test-flight last year near Plattsburgh International Airport in New York--distance and time not disclosed--that led to a recent set of improvements to bring it closer to market.