While driving on a divided highway in the right-most lane with adaptative cruise control and lane-centering turned on, the steering wheel jerked to the right harder and faster than the driver could react, causing the wheels to collide with a concrete curb that led up to a pedestrian walk way next to the highway. We have not had issues otherwise with the lane-centering. And on a 12-mile diagnostic drive, the dealership did not observe the behavior.