,FILE -This Sept. 3, 2013, file photo shows a videographer photographing the Google self-driving car during a news conference at the Virginia Tech
,FILE -This Sept. 3, 2013, file photo shows a videographer photographing the Google self-driving car during a news conference at the Virginia Tech Transportation Institute's Smart Road in Blacksburg Va. A new study that attempts to quantify the benefits of self-driving cars and trucks says they hold the potential to transform driving by eliminating the majority of traffic deaths, significantly reducing congestion and providing tens of billions of dollars in economic benefits. (AP Photo / The Roanoke Times, Matt Gentry, File) (Matt Gentry)