The production prototype of a street-legal airplane completed its first successful flight, raising the possibility that cars will one day fly - or airplanes will become a regular feature on the world's roads.

The US based Terrafugia company said its Transition Street-Legal Airplane has also successfully conducted initial drive and conversion testing.

The Transition is a two-seat personal aircraft that can drive on roads, can be parked in a single-car garage and runs on unleaded automotive gasoline.

Terrafugia COO Anna Mracek Dietrich said the successful first flight "marks a critical move toward initial production and first delivery." The company expects that first delivery to occur "within the next year."

The Transition's first flight lasted eight minutes. The airplane reached an altitude of 1400 ft.

Terrafugia is a Massachusetts-based aerospace company founded by pilots and engineers from the Massachusetts Institute of Technology. Its mission is "to design and deliver revolutionary, practical air and land vehicles that provide freedom, flexibility and fun to their loyal customers."