Originally Posted by hueyhoolihan

i think drivers rarely anticipate the narrowing of a bike lane for a cyclist and don't or can't safely adjust properly when a cyclist is forced to move out to the left. (one way to avoid this is to never use any extra and/or obviously temporary riding space.) they treat it as a merge of sorts and expect the cyclist to assure a margin of safety by slowing down or even stopping and waiting for traffic to pass.