The lane keep assist plots a course and wants to follow it. If you try to drive to close to the white line or to far away from center it will try to keep you on it's path.
Don't get me wrong this is only assist not lane keep. Turn lane keep assist off and see if it still does it. Also I've noticed if the line is gone like at a turn off ( exit ramp)
the car will try to center it self, and pull to the side. System is far from perfect.
The new 2020 models are to have the second generation of the lane keep assist, might be better
Last edited by Gene; 06-21-2019 at 09:58 PM.