Originally Posted by Brian Ratliff
I have never seen a lane designed to be shared by two cars on a continuous basis (aside from a couple 10s of feet approaching an intersection).
I'm missing the point here. I've never seen a lane designed to be shared by a car and a bike on a continuous basis. So what?
I have seen lanes that allow for slower traffic to move aside to allow faster traffic to pass. For example, this is why many states have laws that require drivers of slow moving vehicles to drive as far right as practicable on 2 lane roads when faster traffic is present.