I'll tell you why you see cyclists using the road instead of the perfectly good paths. Often times the paths are not maintained, meaning there are frost heaves and cracks. They are also the last parts of the road to be plowed or swept. And here's a little secret, sharp little rocks and high pressure tires do not mix. Just slow down and move over. A couple seconds out of your day is not going to kill you...but it may save a cyclists that has as much right to be on the road as you do.