In this case I am sure that "human error" will be the scapegoat, but it seems to me that if you have a human driving that particular stretch enough times, then eventually they will miss the braking point.

One wonders for instance, how blame would be placed if he had had a seizure rather than apparently making a mistake? There seems to have been little in the way of backup safeguards.

My own experience of driving at 200km/h on the road suggests to me that things happen pretty quickly at that speed - you can miss a lot in a small amount of distraction.