Comment by prmoustache

Usually in that case you would make it a priority to the right /or left so that everyone only has to look at one side (besides the pedestrians) and in a very busy intersection people with common sense and education naturally do an alternance where you give way to every other car.

I don't know if waymos are programmed for that and it could very well be that there were so many pedestrian crossing it wouldn't apply it anyway.