I observed in an area with wide lanes that it tends to just wander in the lane and sort of bounce off the lines, a bit like a bowling ball with gutter guards. The effect is normally fairly subtle but I can see a very slightly tilted road, tramlining, or even alignment issues making it feel like it is hugging one side. There probably is also some calibration in regards to how sharply it corrects, etc, just thinking about other factors as well.
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