Terrafugia has developed a prototype flying car called the TF-X that could enter mass production. The TF-X borrows construction techniques from hybrid cars in that it runs on both electricity and gasoline. It can carry four people, fly up to 800 kilometers, and fit in a normal garage. On the road it uses electricity, but a gasoline engine powers flight. An autopilot system finds suitable landing spots when fuel runs low, though the pilot makes the final safety decision.