I won't re-invent the wheel, but direct you to John Allen's post over here. Given the amount of Federal road in the West, I suggest you call your congressional delegation and ask that the offending provision be removed. Here it is:
(d) BICYCLE SAFETY.—The Secretary of the appropriate Federal land management agency shall prohibit the use of bicycles on each federally owned road that has a speed limit of 30 miles per hour or greater and an adjacent paved path for use by bicycles within 100 yards of the road unless the Secretary determines that the bicycle level of service on that roadway is rated B or higher.
Details of what that means are covered pretty well in Mr. Allen's analysis. I concur with John that there is little in that language which would make you safe and a lot that would restrict your ability to ride your bike.