General Motors and Segway are developing an electric two-seat prototype vehicle with just two wheels, which could allow people to travel around cities more quickly, safely, quietly and cleanly, and at a lower total cost. The collaboration, dubbed Project P.U.M.A. (Personal Urban Mobility and Accessibility) combines several technologies that increase mobility freedom with zero emissions, enhanced safety, seamless connectivity and reduced congestion in cities. The Project P.U.M.A. prototype takes a test drive in Brooklyn, NY Saturday, April 4, 2009. (Photo by Emile Wamsteker for General Motors)