Sure. Here is the law, from RS 32:
197. Riding on roadways and bicycle paths
A. Every person operating a bicycle upon a roadway shall ride as near to the right side of the roadway as practicable, exercising due care when passing a standing vehicle or one proceeding in the same direction.
B. Persons riding bicycles upon a roadway shall not ride more than two abreast except on paths or parts of roadways set aside for the exclusive use of bicycles.
C. Whenever a usable path for bicycles has been provided adjacent to a roadway, bicycle riders shall use such path and shall not use the roadway.
What this means is that a cyclist must abandon the roadway whenever there is a nearby bicycle facility. I've interpreted and argued this to be a
parallel, signed bikeway in
usable condition. It really helps if you know the relevant parts of the code better than whoever you are debating the point with.
To put it in motorists' terms, they gotta bail on the freeway anytime there is a service road.
Some refer to this as the 'bicyclist inferiority clause' of the Federal uniform vehicle code.