Self-driving Uber cabs may hit Pittsburgh’s streets in mid-2019.

At Bloomberg’s #TheYearAhead global economic forum event in Davos, Switzerland, Uber CEO Dara Khosrowshahi made the remarks while speaking to John Micklethwait, Bloomberg’s editor-in-chief.

During the chat, Khosrowshahi also described how Uber users would have the option of choosing between self-driving vehicle service or a human driver, with a launch plan of self-driving cars constituting 5 percent of all rides before eventually increasing in number. The choice of autonomous or a human driver would depend on various factors, including but not limited to the completeness of area mapping and favorable weather conditions.

Regarding Uber’s self-driving integration into cities, Khosrowshahi provided more insight into how drivers are expected to expand its autonomous capabilities, using Phoenix, Ariz. as an example.

“That five percent is going to 10, and 15, and 20, as our computers and our algorithms learn more and more about what it takes to drive in a city in a real-life situation,” remarked Khosrowshahi. “Every minute of every day, that driver, that computer, is going to be better and know Phoenix better and better and better. In five years, we will have the perfect driver in Phoenix.”

Uber’s first introduced self-driving cars to Pittsburgh on Sept. 2016, running a beta test fleet of 14 hybrid Ford Fusions around the city, collecting distance measurements to fill out its mapping data using a series of radar, cameras, and scanners. In those exercises, each Fusion was manned by two Uber employees.

Pittsburgh is also the home of Uber’s Advanced Technologies Group, an assembly of self-driving engineers working on mapping and safety technologies. Other cities housing Uber’s self-driving engineers include San Francisco, Calif. and Toronto, Canada.

Bloomberg News