Once robocars are clearly about ready to scale up, there'll be a variety of designs including one- or two-passenger cars. Conversely, buses usually go mostly e

Once robocars are clearly about ready to scale up, there'll be a variety of designs including one- or two-passenger cars. Conversely, buses usually go mostly empty except during rush hour. Finally, small on-demand robocars should be a great way to conveniently connect to a local train station and then to your ultimate destination, raising demand for complementary mass transit.