Joel Johnson laughs nervously from the backseat when his self-driving taxi stops in the middle of a busy road in suburban Phoenix. The car, operated by autonomous vehicle pioneer Waymo, has encountered a row of traffic cones in a construction zone, and won’t move. “Go around, man,” Johnson says as he gestures to the drivers honking behind him.
After the vehicle has spent 14 mostly motionless minutes obstructing traffic, a Waymo technician tries to approach—but the car unexpectedly rolls forward, away from him. “It definitely seemed like a dangerous situation,” Johnson recalls.