Drive to the right edge of the road and stop until the emergency vehicle(s) have passed

That is a direct quote from the California DMV and from the sounds of it that's exactly what the autonomous car did.

The right answer, in my opinion, is to allow the first responders to take control of the car. This wasn't just a lone ambulance that happened upon a stationary car. It was a major crash (where a human driven car ran over a pedestrian) with a road that was blocked by emergency vehicles. A whole bunch of cars, not just autonomous ones, were stopped in the middle of the road waiting for the emergency to be over so they could continue on their way. Not sure why only this one car is getting all the blame.