Self-Driving, as Opposed to Driverless, Truck

Daimler Demonstrates a Self-Driving Truck.  (The New York Times, 7/4/2014)

Steering wheel included.  Along an eight-lane stretch of the autobahn, the large silver truck of the future fell into line with 20 other vehicles used to simulate realistic driving conditions. The truck responded to slowing cars in its lane by adjusting its speed accordingly and registered an approaching emergency vehicle in time to slide effortlessly into the far-right lane, allowing the emergency vehicle to pass on the left. 

Unlike the pod-shape, two-seat driverless vehicle introduced recently by Google, the Daimler truck retains a steering wheel as a safety measure. This allows a driver to intervene for critical maneuvers, like overtaking a slower-moving vehicle in the left lane, much in the same way as the pilot of an airliner can intervene to guide an aircraft set on autopilot.

Daimler.   World premiere for the transport of the future