Technological marvel: Cars can drive themselves now

A self-driving car is now one step closer to the fast lane.

Nevada is the first state to allow these vehicles onto the road.

The car is a Prius retro-fitted by Google.

The technology it uses is similar to that in a jumbo jet.

A human driver can take control, but the car is on auto-pilot -- navigated by artificial intelligence -- and assisted by the GPS and motion sensors.

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