They tried electronic communication between light vehicles and big trucks in a mine I worked in. They gave the idea away. It was supposed to detect when LV's were I the trucks blind spots (which are huge in big trucks).
It was all disabled when I drove the trucks but apparently it was a failure. Technology will improve no doubt but you can never cover all the variables can you. Even in a mine site where they have almost complete control over where everyone drives.
When the technology fails you then have even more people responsible for the result. I can't see how a company will cover the risks of a driverless car. Who is at fault in an accident? If the car malfunctions and the car driver(??) can't correct the problem in time I would hold the manufacturer responsible.
When big airliners crash there is huge investigations and compulsory updates and repairs by the plane manufacturers. There is no way that with the huge amount of cars on the road that any authority will be able to have a similar ability.
I predict that Tesla will go the way of the DoDo due to litigation.