There are some caveats, of course. A Waymo employee will remain in the vehicle for now. But instead of being in the front seat, that employee will likely sit behind the driver’s seat. (Waymo says that won’t always be the case, though.) The cars won’t have free rein over Arizona’s roads. They’ll be geofenced within a 100-square-mile area of the town of Chandler, a suburb of Phoenix — though Waymo says it plans to expand to areas beyond that as its cars collect more data and conduct more trips. And the cars won’t be available to just anyone who wants to go for a ride. Members of Waymo’s Early Rider program, which has been in operation in Chandler since last April, will be the first to experience the new technology.