In line with rivals such as Ford, Audi has promised "piloted" cars by 2025 that can take over when the driver needs.
The A7, a four-door coupe called "Jack", shows Audi's "Piloted Driving" technology working in a real environment for the first time. The company previously showed off piloted driving with an Audi RS7 that drove itself round a Grand Prix circuit in Germany, reaching a top speed of 149mph.
Jack, driving from San Francisco to the CES 2015 show in Las Vegas, via Bakersfield, was fitted with newly developed sensors that enabled the car to brake, accelerate, change lanes on the motorway and speed up to overtake other vehicles.
The sensors enable the car to constantly gather data on its surroundings and adjust its behaviour accordingly. In crowded environments, drivers are asked to take over controls to ensure their safety.