In Tempe, Arizona, on the cool late-winter night of March 18, Elaine Herzberg, a 49-year-old homeless woman, stepped out onto Mill Avenue. A new moon hung in the sky, providing little illumination. Mill Avenue is a multi-lane road, and Herzberg was walking a bike across; plastic bags with some of her few possessions were dangling from the handlebars. Out of the darkness, an Uber-owned Volvo XC90 SUV, traveling northbound, approached at 39 miles per hour, and struck Herzberg. The Uber came to an unceremonious stop, an ambulance was called, and she died later in a hospital. The car had been in autonomous mode.