The city of Pittsburgh is also intent on competing with Detroit as a self-driving technopolis. Because of some pioneering research in self-driving technology at Carnegie Mellon University, Pittsburgh has emerged as a key development site.Uber is using autonomous cars to provide rides in one section of the city, a project for which Bill Peduto, the mayor, said he was happy to “roll out the red carpet.” Delphi Automotive, a maker of automobile components, is also working on self-driving systems in Pittsburgh.