I will play the advocate here and say on this one, the bicyclists are being very nice by not taking up the road and instead letting you pass in any way shape or form (unless there is a dedicated bike lane). You are supposed to treat them like any other vehicle under colorado law. They can without any legal problems, ride in the middle of the street and piss everyone off and there is nothing anyone can do about it unless they are riding under the minimum speed limit if there is one for the road they are on. So, really, the next time some ass hole of a biker gives you the room to get around, you should appreciate it because he legally doesn't have to, he can make you and everyone else go his speed.