Do you have a reference for this quote? I recall he said that 'freeway driving was basically a solved problem' and that is basically true. The devil is in the details in the quotes...
This event was may 2016
Elon: I really consider autonomous driving a solved problem.
DIETER BOHN10:16:53 PM PDT
Especially in traffic and on highways with no pedestrians, Musk thinks autonomous driving is already safer than a human.
DIETER BOHN10:17:49 PM PDT
"I think we are probably less that two years away" from safe autonomy, Musk says. But he thinks the regulators will wait to see the data.