Since I'm sure there's going to be a manual override feature built in -- just like with airlines' autopilot -- there will also likely be a limit feature built in so, for instance, if the driver overrides the auto-drive say, DAILY, the whole car will lock out. Just SHUT DOWN. A way to ensure that it isn't being used capriciously.
I will REITERATE -- a DRIVERLESS car will all but totally ELIMINATE road rage; computers don't get impatient or pissed at slower-moving objects in front of them. A cyclist would get hit by a driverless car when the programming goes apestick.