Video - inside look at Google's driverless vehicle.
State legislators have passed a bill that requires the Nevada Department of Motor Vehicles to draw up rules for driver-less vehicles.
Assembly Bill No 511 paves the way for Google's automated Toyota Priuses and Audi TT to be operated legally in the Silver State.
The hybrid vehicles use laser range finders and video cameras to detect traffic, and detailed maps to find their way from point to point.
'Drivers' simply set their destination and the car calculates the route and drives itself there.
The first amendment, which was passed last week, relates to an electric-vehicle bill providing for the licensing and testing of autonomous vehicles.
The second amendment, which has yet to be passed, is for an exemption that would permit sending a text message while 'behind the wheel'.