Observing a traffic jam reveals that most cars have just one person in them. That is, most of a traffic jam's volume is an unused space. In my opinion, one should not have to give up the comfort of a private car, or purchase two cars. I, therefore, designed a two-seater electric car for urban transit purposes, of about half the length of a regular car. A modular attachment provides three additional seats and a gasoline engine to extend the travel range. "Take only what you need". Because the gasoline engine will usually remain at home, the car is even more fuel-efficient than regular hybrid cars.