Rafaela Vasquez liked to work nights, alone, buffered from a world she had her reasons to distrust. One Sunday night in March 2018, Uber assigned her the Scottsdale loop. She drove a gray Volvo SUV, rigged up with cameras and lidar sensors, through the company's garage, past the rows of identical cars, past a poster depicting a driver staring down at a cell phone that warned, "It Can Wait." The clock ticked past 9:15, and Vasquez reached the route's entry point. She flipped the Volvo into autonomous mode, and the car navigated itself through a blur of suburban Arizona, past auto dealers and Zorba's Adult Shop and the check-cashing place and McDonald's.