as to the human cars' mention of the hand, I use the 'hand lane claim' a lot and it is effective much of the time.

are you watching behind you with a mirror to adjust your lateral position for overtaking traffic?

left bias in a right turn lane will get you either passed on the right or swooped on from the left; you can ride a do-si-do with overtakers, as they approach, you move a bit more right, then back to your safety bias again. this is a technique described by good old Helmet Head as 'dynamic lateral lane positioning'.