One major step forward was taken last week on a motorway outside Barcelona - the first-ever test drive of a road train among other road users.

ENGADGET: Volvo's driverless road train in Spain is public mainly on the plain (video)

The company also is developing four-wheel-drive technology that powers two wheels with an internal combustion engine and two with an electric motor, eliminating the need for a drive train that takes up floor space, Ho said.

NPR: China's Struggling Automakers Jump On SUV Boom

Hayek envisioned the city-friendly Swatchmobile to be equipped with a hybrid drive train.

FORBES: Smart Fortwo Electric Drive Is On Time

People travelling from Camberley to London now have to take the slow train or drive five miles to Farnborough to get a train which takes 43 minutes.

BBC: South West rolling stock

Another room contains cars from a certain luxury European automaker that will use a Tesla electric drive train.

FORBES: There He Goes Again: Romney's Tesla Gaffe

The Taco Truck's bid to ace last year's race ended on the first day when the sculpture's drive train broke on a sand dune, says Weiss.

CNN: Art in motion at the Kinetic Grand Championship

In an ironic twist, one of the showstoppers is the VL Destino, which strips the Karma of its electric drive-train and inserts a fire-breathing, 638-horsepower Corvette ZR-1 gas engine in its place.

WSJ: Henry Payne: The Motor City Roars Out of Washington's Shadow

She was spotted boarding a train to Birmingham Moor Street and was last seen in Circus Drive, Glasgow, on Thursday.

BBC: Missing girl Sameen Ahmed last seen in Glasgow

Enthusiasts from all over the world will travel to the island this summer for the chance to drive the restored train - as part of the 'Ultimate Driving Experience' project, which currently has a two-year waiting list.

BBC: Caledonia

Unlike flirtation on a train, where there's nowhere to go if things get awkward, you can always drive away in a car.

WSJ: Rules of the Driverless Road