Flaw iscars must be programmed not to kill so Bang Bang or Forty Coats or Mad Mary will just walk out in front of them car has to stop .Might work is Saudi or some Despotic State but Paddy will play with the traffic just for the hell of it .A lot of the tec willbe fitted to traditional cars to prevent crashes control speed .Big oil wont let it happen .My personal view is like Video recorders they will be invented used for a while then abandoned .They solve a problem that dosent exist .We have driverless we call them busses ,trains ,Taxies