U.S. updates self-driving car guidelines as more hit the road

"ince the new guidelines are policy, not law, they don't legally change what the state and federal government and vehicle developers can do, said Bryant Walker Smith, a law professor at the University of South Carolina who tracks government policy on self-driving cars. Some countries, like South Korea, require pre-market government approval before autonomous vehicles can go out on the road, so the U.S. is on the more lenient side, Smith said."