There are challenges beyond technical.
Not only ethical and legal
https://www.technologyreview.com/201...ammed-to-kill/ (the paper:
https://arxiv.org/ftp/arxiv/papers/1510/1510.03346.pdf)
but also those of morality at production / development:
https://arstechnica.com/cars/2018/03...nt-believe-it/ - this one has the corporation not being truthful towards the public about what has actually happened.