The following was copied/pasted from another forum today:
A 20-mile section of the Blue Ridge Parkway is closed in western North Carolina because of a crack in the pavement.
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. So, I've summarized what Foy originally posted here:
The Blue Ridge Parkway is closed between milepost 375, near Asheville to milepost 355 near Mount Mitchel State Park. For other information, please use the link above.
Given the length, width, and depth of the "crack", geotechnical engineering inspection will likely determine this to be a "slump" in fill material. I'm hard-pressed to imagine a fix for a slump of this magnitude which wouldn't involve many days to weeks of work.