According to wikipedia, the car was traveling at 43 mph when it detected the pedestrian, and street has a posted 45 mph limit. There was no reported inclement weather, heavy traffic, or faulty lighting, so I don't see a reason to suspect traveling just below the speed limit should be considered speeding. Police had released a statement claiming the limit was 35 mph, although that's contradicted by the signs.
According to police, 85% of drivers would have identified the pedestrian 5.6 seconds away, and the Uber system identified it 6 seconds away. That should be enough time to stop safely and/or manuever around the pedestrian. So I really don't see a speed issue. The issue is that the Uber system did not react in a timely fashion, the human driver was not prepared to drive, and the Uber system test did not have appropriate safety controls.
According to police, 85% of drivers would have identified the pedestrian 5.6 seconds away, and the Uber system identified it 6 seconds away. That should be enough time to stop safely and/or manuever around the pedestrian. So I really don't see a speed issue. The issue is that the Uber system did not react in a timely fashion, the human driver was not prepared to drive, and the Uber system test did not have appropriate safety controls.