Google abandoned features which gave drivers control
 

They were not awake enough

Google’s self-driving car unit Waymo abandoned developing features that required drivers to take control in dangerous situations because drivers tended to nod off when in auto-pilot mode and were not ready to take over.

Experiments of the technology in Silicon Valley that showed test users napping, putting on makeup and fiddling with their phones as the vehicles travelled up to 56 mph.

http://fudzilla.com/news/44844-googl...rivers-control