The scenarios you are describing are incredibly common, and trivial to develop for in comparison to real edge scenarios (not to say they are trivial to develop

The scenarios you are describing are incredibly common, and trivial to develop for in comparison to real edge scenarios (not to say they are trivial to develop for). More challenging are things like, "How do you respond to a homeless guy standing on the street directing traffic into an alley", "How do you respond to a flooding on the road resulting in 6" of standing water obscuring all traffic lane markings", "How do you respond to a flooding on the road resulting in 18" of standing water? 24" of standing water?" How do you respond to a road covered in snow (12", 18", 24")? How do you respond to a road covered in snow with tire prints that seem to go into the oncoming lane? How do you respond to a road covered in snow with what appears to be a small 24" high snow drift in your lane? Etc, Etc.. I think the answer to all these questions is, "Initial versions of Automated vehicles will only perform under ideal road scenarios. During Snow, Flooding, or other inclement weather, they will not be dispatched. Wait for future iterations in 2030, 2040, 2050, etc...