By shifting from one portion of a lane to another you can keep a safe cushion of space on both sides. An experienced rider changes position within the lane as traffic conditions change. Here are some conditions that require changes in lane position. When you are being passed from behind or by an oncoming vehicle, keep in the center portion of your lane. A slight mistake by you or the passing driver could cause a sideswipe.
Some drivers forget that their mirrors hang out further than their fenders.
Even if the driver knows you're there, a passenger may not see you and might toss something on you or the road ahead of you. They can affect your control. You have more room for error if you are in the middle portion when you are hit by this blast than you would have if you were on either side of the lane. Do not move into the portion of the lane farthest from the passing vehicle. While such a move would open up additional space between you and the passing vehicle, it might invite the other driver to cut back into your lane too early.