Waymo is working on an autonomous taxi fleet, modeled after the pilot program it currently offers outside of Phoenix. The big difference here is that once fully launched, Waymo's service won't have a driver behind the wheel. Additionally, the company will up its fleet of self-driving Chrysler Pacifica minivans from 100 to 500. As you'd imagine, the entire ride-hailing process will be handled via a mobile app. While the initial service area will be limited to the Phoenix metro area, in a post on Medium, the company says eventually it will "cover a region that's larger than the size of Greater London." Waymo says that the public will be able to start taking autonomous rides "over the next few months" in the agricultural suburb, Chandler, Arizona.