Are bikers really that bad in your area? The only time I recall bikers (other then motorcycles) disrupting traffic is when I was in Iowa "LaMars???" and they had a some kind of a bike week. Vans and busses of bikers. RIding everywhere in huge groups. Not on a course but along lines of "Hey guys I am going to ride to other side of town to get coffee" and 20 other decide to go along. Meanwhile someone else decides to check out mall (and 20 more go along) so they are spread out 2 blocks long weaving thru traffic.
Otherwise I have always found bikers (other then messenger) a pita on road. Yep they may not be going 15mph over speed limit...