The "safe" part is a huge one. We need a definition of "safe" on a formal level of ISO26262 which is also feasible. From what I have heard the validation would

The "safe" part is a huge one. We need a definition of "safe" on a formal level of ISO26262 which is also feasible. From what I have heard the validation would require billions if not trillions of miles driven. If you retrain the neural net, you start from 0. Currently, it is not feasible to sell a safe self-driving car.