The approach I think you are proposing, safety above all, often leads to very low efficiency and in the end can lower total safety, for example encouraging shif

The approach I think you are proposing, safety above all, often leads to very low efficiency and in the end can lower total safety, for example encouraging shift to alternative modes of transport. Or by setting the certification bar so high that companies with new technologies, including those to improve safety, do not even bother to apply. An approach of joint utility, taking into account time, money and risk usually works better.