If they have radar they might have a safety edge in some cases.
Would possibly have been aware, before I was yesterday, of cyclist on a country lane with no street lighting, in the dark .. cyclist had no lights and dark clothes, only plus point was the cycle has a rear reflector to give me a bit of advance warning
Disclosure: I drive/cycle/walk/use public transport - there is bad road use by drivers, cyclists and pedestrians. As a human I know there are times when my attention can waver (e.g. when passengers in car cause distraction), AV would not have that drawback.