Green cars and concept cars at Geneva auto show 2013

A BMW i8 concept car is displayed at the 83rd Geneva Auto Show at the Palexpo Arena in Geneva, March 6, 2013. [Photo / Xinhua]

"The key thing here is that the car is only 850 millimeters wide. Plus, it has this very innovative active leaning system, which enables it to wind through narrow streets and very tights environments. So it's a very usable concept in an urban environment."

At another part of the auto show, Rinspeed is showing off its solution to urban traffic jams and congestion.

The Micromax concept car offers a zany futuristic vision of urban mobility by designer Frank M. Rinderknecht.

A map emblazoned on the exterior of this funky electric minivan belies a solidly digital interior comprised of a 19-inch HD infotainment consul with GPS, cloud systems to create what its designers call the "networked swarm car".