> A robot should always assume the person might suddenly enter the street regardless of body language or other clues and drive at speeds that allow safe stopping if that occurs.

> A person driving should do the same.

At what range? If you assume someone could always jump out in front of you, and that running them down will always be unacceptable, you'll be doing a handful of miles an hour whenever there are humans around. In practice I doubt too many people are in favour of taking safety to that extreme.