You must keep your hands on the steering wheel at all times.
When the system is active and detects no steering activity for a period of time, the system alerts you to put your hands on the steering wheel. If you do not react appropriately to the warnings the adaptive cruise control with lane centering system cancels and slows your vehicle down to idle speeds while maintaining steering control. See
Lane Centering Automatic Cancellation.
The system also alerts you if your vehicle crosses lane line markings without detected steering activity.
Note:
The system could detect a light grip or light touch on the steering wheel as hands-off driving.