"A flying car is to go into commercial production after manufacturers were given a special exemption by US aviation officials.
"The Terrafugia Transition is designed as a 'light sport' aircraft, the smallest kind of private aeroplane under FAA classification.
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"Light sport aircraft licences require just 20 hours' flying time, making them much easier to obtain than full private licences.
"The two-seater Transition can use its front-wheel drive on roads at ordinary highway speeds, with wings folded, at a respectable 30mpg.
"Once it has arrived at a suitable take-off spot - an airport, or adequately sized piece of flat private land - it can fold down the wings, engage its rear-facing propellor, and take off.
"Its cruising speed in the air is 115mph, it has a range of 460 miles, and it can carry 450lb. It requires a 1,700-foot runway to take off and can fit in a standard garage."