Certainly flying cars have been a popular image of "the future" since at least the 1950's. In the past few decades a number of inventors have worked on a variety of models. Some look more like cars, while others look more like airplanes. The latter is the case with the latest and greatest, produced by Burt Rutan. See link flying cars. His latest vehicle, the "BiPod," has two fuselages, so its a bit antisocial for passengers as you can see. Rutan is the founder of Scaled Composites, the Mojave, California-based maker of record breaking planes. Thus he decided also to design and build his own "roadable aircraft" - a car that can be converted into a plane. Meanwhile, another company, MIT spinoff Terrafugia, has won road approval for Transition, another "roadable aircraft." The EU has in fact pumped 4.3 million Euros into developing new collision avoidance technology which certainly would be critical if such personal aircraft are to take to the air in meaningful numbers.