Cities are overly congested with traffic and pollution. At present the most widely discussed solution is urban on-demand mobility based self-driving technology. The envisioned automated mobility-on-demand (AMoD) systems employ a centrally-controlled fleet of self-driving vehicles to provide on-demand point-to-point transportation to the users of the system. Such systems promise to revolutionise user behaviour and significantly improve the efficiency of urban transportation. As a case study, Michal Čáp discusses and quantify the potential for car-sharing and ride-sharing to reduce the number of vehicles in the city of Prague, its application to other cities around the world and the implications for policy making.