Images: The RoboCars of 2057

The Slipstream is a teardrop-shaped pod made out of solar panels that rides on two wheels. In anticipation of overcrowded highways, Volkswagen designed the Slipstream to travel in a special highway lane that will enable it to be driven in an upright position that takes up one-fifth of the highway space taken by today's average car. It will also feature rear fins that let it hover at speeds of up to 250 mph.

Photo by Volkswagen/Audi Design Center California