According to reports, the pedestrian was illegally crossing the road at a traffic light with a red light for the pedestrians and a green light for the cars.
The human driven car presumably didn’t see the pedestrian and hit her at high speed, she then bounced into the path of the autonomous car. The autonomous car, which was empty, slammed on the brakes but could not stop in time.
Would a human have stopped in time? That would depend on the human…