Wow, I do not see that around here (Boston) at all, myself...although, the roads are a lot narrower on average here than in California so there are more pedestrians crossing at places other than marked crossings. It's less of an adventure here than in CA to cross the road.Poor road markings is a problem here too, for all drivers (computer and human.) They fade away too fast between the new environmentally safer paint and the use of road salt.
But I bet Boston will be a HUGE problem for AV because of the tendency of the drivers there to stop to allow pedestrians to cross. I found that if I was standing still at a corner, checking a tourist map, I needed to stand with my back to the road or else the drivers would stop to let me cross!
But in any case, why would it be a big problem for AVs?