I've had similar problems with drivers only it's because they think they think they helping me or are just being careful. For instance, they yield to me when they have the right of way at intersections and slow down when driving by me would server them and me better, like when I want to make a left hand turn at night. I don't like to get into the center of the road at night if I think they will over take me before my turn, I usually have to stop on such occasions.