because it does not require handing over control to the car to get a good test. the cars can simply record their decision making process and immediately flag al

because it does not require handing over control to the car to get a good test. the cars can simply record their decision making process and immediately flag all exceptions, which includes hitting anything. It would be very interesting to see all exceptions because it is to be expected all these systems must fail. we don't need active testing on our streets. automakers would have dared to test ABS or "safety" systems in such a manner for the simple reason of liability.