MIT design - a stackable electric car (City Car)

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Researchers at MIT are building a prototype of a lightweight electric vehicle that can be cheaply mass-produced, rented by commuters under a shared-use business model, and folded and stacked like grocery carts at subway stations or other central sites. It's called the City Car, and the key to the concept lies in the design of its wheels. The MIT team has transformed the lowly wheel into a robotic drive system that will power the City Car. Embedded in each of its four wheels will be an electric motor, steering and braking mechanisms, suspension, and digital controls, all integrated into sealed units that can be snapped on and off.

The Smart Cities team at MIT is tackling the problem of city traffic congestion -- still left untouched by the Segway -- with a "stackable" car to be used as part of a public transportation program, much like those bicycle-sharing programs in Europe, and stowed like a shopping cart. The wheels turn 360 degrees and contain the suspension and motor, so, along with providing a level of mobility fit for a city, they allow a new type of passenger compartment, replete with customizable displays and seats with "fingers" to catch you in a crash. It all sounds well and good, but we'll have to see see how much of this tech makes it into the final prototype, which is to be built by GM upon the MIT group's completion of the design.