https://www.techdirt.com/articles/20191106/07100543337/report-suggests-rampant-negligence-uber-self-driving-car-fatality.shtml

Earlier this year you might recall that a self-driving Uber in Tempe, Arizona killed a woman who was trying to cross the street with her bike outside of a crosswalk. The driver wasn't paying attention, and the car itself failed to stop for the jaywalking pedestrian. Initial reporting on the subject, most of it based on anonymous Uber sources who spoke to the paywalled news outlet The Information, strongly pushed the idea that the car's sensors worked as intended and detected the woman, but bugs in the system software failed to properly identify the woman as something to avoid:

"The car’s sensors detected the pedestrian, who was crossing the street with a bicycle, but Uber’s software decided it didn’t need to react right away. That’s a result of how the software was tuned. Like other autonomous vehicle systems, Uber’s software has the ability to ignore “false positives,” or objects in its path that wouldn’t actually be a problem for the vehicle, such as a plastic bag floating over a road. In this case, Uber executives believe the company’s system was tuned so that it reacted less to such objects. But the tuning went too far, and the car didn’t react fast enough, one of these people said."