According to data obtained from the self-driving system, the system first registered radar and LIDAR observations of the pedestrian about 6 seconds before impact, when *the vehicle was traveling at 43 mph*. As the vehicle and pedestrian paths converged, the self-driving system software classified the pedestrian as an unknown object, as a vehicle, and then as a bicycle with varying expectations of future travel path. At 1.3 seconds before impact, the self-driving system determined that an emergency braking maneuver was needed to mitigate a collision. According to Uber,* emergency braking maneuvers are not enabled while the vehicle is under computer control, to reduce the potential for erratic vehicle behavior.* The vehicle operator is relied on to intervene and take action. *The system is not designed to alert the operator.*
https://www.ntsb.gov/investigations/AccidentReports/Reports/HWY18MH010-preli... Giacomo