Unstable slope means more blasting on Interstate 81 in Montgomery County Timothy Martin July 30, 2013 1 minute read An unstable slope is expected to cause delays starting tomorrow On Interstate 81 in Montgomery County. WFIR’s Timothy Martin reports. Share: Post navigation Previous: Will drop in gas prices continue?Next: New partnership benefits Explore Park Related Stories United Way cuts ribbon on new home in SW Roanoke County Gene Marrano April 14, 2026 State asks you to hold off outdoor burning until May Evan Jones April 14, 2026 Messaging expert says referendum ads are designed to confuse Evan Jones April 14, 2026