Automated cars that can be instantly overridden by a human in control are already on the roads being tested. http://alttransport.com/2010/10/the-google-car-that-drives-itself-successfully-tested/
“Tested”.
But, as a general purpose, individual-owned, personal vehicle they will never be popularly ACCEPTED.
As I said, they may wind up having specialized uses, but the individual-owned, personal UN-AUTOMATED vehicle will continue to be the commonly accepted choice for most people.
Just because technology can do something does not mean that what technology CAN DO will be chosen for what most people WANT to do.