That is not the way human beings typically evaluate risks. 'Acceptable risks' are more about psychology and not a statistical calculation. A self driving car that is twice as safe as the human average would be considered an unacceptable risk.
Add something that is new/unknown + lack of control, and you will have to clear a very high threshold to be considered 'acceptably safe'. My guess is a minimum of a 0.1x.
Add something that is new/unknown + lack of control, and you will have to clear a very high threshold to be considered 'acceptably safe'. My guess is a minimum of a 0.1x.