There are a bunch of ways you can test the systems apart from just looking at fatality numbers. Here's a TV show testing auto-braking systems for example. https://www.youtube.com/watch?v=PzHM6PVTjXo
You could easily extend that to a test track with all sorts of stuff self driving cars find hard - oil spills, diversions, people / animals / plastic bags jumping out and so on.
You could easily extend that to a test track with all sorts of stuff self driving cars find hard - oil spills, diversions, people / animals / plastic bags jumping out and so on.