Photos: Three-wheeling in the city

It's short, it's skinny, and it gets the equivalent of 108 miles per gallon. It's the Clever vehicle, a prototype from a conglomeration of European groups, including automaker BMW. Unveiled in Britain on Monday, Clever--short for compact low-emission vehicle for urban transport--is designed to combine the features of a micro car and a motorbike. Just over three feet wide, the Clever seats two, with the passenger directly behind the driver.

Photo by University of Bath