A Two-Wheeled, Two-Seat, Tiny Electric People-Mover from G.M. and Segway

General Motors and Segway have unveiled the prototype of their new collaborative effort: a tiny electric vehicle that the companies say could, maybe, one day, revolutionize urban transportation. The two-seated, two-wheeled pod is called PUMA, which stands for Personal Urban Mobility and Accessibility. G.M. executive Larry Burns says the PUMA is part of the company's