The collapse, which took out a large chunk of the southbound carriageway in the early hours of yesterday, saw drivers taking a short diversion via Fala Dam, and rejoining the A68 at Fala village.
Amey, which delivers maintenance and inspection services on the country’s south-east trunk roads network, says a fuller closure needs to be in place to allow investigations into the collapse.
A spokesperson for Amey said: “A severe weather incident in the early hours of Wednesday, August 12, on the A68 /B6367 from Pathhead to the B6458 at Fala Dam, has resulted in damage to the carriageway.
“As a result, a full closure of the A68 is required at this location, with a signed diversion route in place.
“Northbound traffic will be diverted to the A6091 and at the junction with the A7 will travel via Galashiels, Stow and Fountainhall. From here, vehicles will join the B6458 to re-join the A68 at Tynehead junction.
“Southbound traffic will follow the same diversion in the opposite direction.
“This diversion route is 25.6 miles. Please allow extra time for your journey.”
Joanne Turner, Amey’s principal civil engineer with the South East Trunk Roads Unit, said: “Geotechnical investigations into the extent of the damage and the necessary repair are ongoing, and further updates will be provided by Transport Scotland and the relevant operating company.
“A timeframe for the repair will be developed once investigations are completed and more information will be provided in due course.”