Ecofriend has an interesting post about the three-wheeled vehicle above that is called a Peugeot plus. Econfriend says the car runs on an electric motor and aims to have almost no carbon footprint.
it's a hybrid, between a scooter and a car. This combination allows using a smaller electric engine, saving energy. This saving generates less pollution and a major autonomy of the batteries. Besides the small size gives more agility into the traffic and makes easier to find parking.
It would probably be much easier to find a parking place with this. The problem is you would still be surrounded by the SUVs, Hummers and large trucks of today's world. For something like this to work it almost needs a city that is modeled for them or a city that bars large vehicles from entering.
