I have never had a chance to ride in Blue Ridge Parkway, but just read in Bike Rumor that there is a draft of a management plan that could result in limiting cycling. The plan is said to be focused on the driving experience. Comments on the plan can be submitted online but will be closed on December 16. Here is the Bike Rumor link:

http://www.bikerumor.com/2011/12/09/...ycling-to-end/