The promise is zero accidents and deaths/serious injuries and this will nearly be delivered in Western Europe BUT the problem will be people being killed/seriously injured by a computer rather than a person. Hundreds of deaths/seriously injured per annum are accepted by us all as part and parcel of life on the road. To promise zero and not deliver will cause outrage and the Daily Mail would have a field day... in a kind of perverse way we accept that people kill people whether by accident or intent, that a malfunctioning computer confused by too much rain kills one person instead of 10,000 people being killed by a person is unacceptable; according to https://www.asirt.org/safe-travel/road-safety-facts 3700 people die EVERY DAY in road accidents world wide... try making that zero.