Hiriko is a city car concept developed by MIT and named after, predictably, the Basque word for "urban." With "robot wheels" at each corner incorporating independent motors, suspension, and control systems, the car has more in common with the Mars rovers than conventional cars.
The car can collapse its wheelbase/length from 100" to 60" to allow it to be parked nose-to-curb. Some sites claim that, in compressed form, it's the world's tiniest car. It's not, as you can actually buy a Peel P50 (albeit for way too much money) and that's only about 47" long.