I'm having this little argument on our local cycling board in St Louis, see below, about whether the two cyclists I saw were breaking the law. The Missouri vehicle code is as follows:
"Riding to right, required for bicycles and motorized bicycles.
307.190. Every person operating a bicycle or motorized bicycle at less than the posted speed or slower than the flow of traffic upon a street or highway shall ride as near to the right side of the roadway as safe, exercising due care when passing a standing vehicle or one proceeding in the same direction,
when making a left turn, when avoiding hazardous conditions, when the lane is too narrow to share with another vehicle, or when on a one-way street. Bicyclists may ride abreast when not impeding other vehicles." (bold added for emphasis)
The situation was that I was driving my car last Sat afternoon on a road on which I bike commute and observed three cyclists, two of which were riding side-by-side, third cyclist in front of them. I was in the inner lane moving with the flow of traffic, four lane road, two lanes each way. As I approached the group of three, I observed a car behind the two cyclists tapping its brakes and looking like it was being impeded by the two cyclists who were taking the entire lane. There was no room to pass in the inner lane because it was full of traffic. This continued for about 1/4 mile, after which I observed the car make a right hand turn and the cyclists continue straight. I claim the cyclists were breaking the law by impeding traffic riding two abreast, and that they should have been riding single file and sharing the lane because from experience on this road, the lane is wide enough to share with a car side-by-side. Others claim they were not impeding traffic because it is a four lane road and the inner lane was somehow available. Thoughts?