The MSP for Ettrick, Roxburgh and Berwickshire, John Lamont, has called for repairs to the A708 to be prioritised.
A large section of the road between Moffat and Selkirk, near to Grey Mare's Tail, collapsed after heavy rainfall yesterday (15th April).
The road is a major route between the Scottish Borders and Dumfries and Galloway, and its closure leaves many drivers with a lengthy diversion along the A72 and A701.
Dumfries & Galloway Council estimate that the repairs to the road will take between five and seven days.
Mr Lamont has called for all measures to be taken to reopen the road as soon as possible:
“The A708 is a vital route for many motorists in the Borders as it is a key route between the Borders and Dumfries and Galloway.
"While I am glad that the road was shut before any serious accidents occurred at the site, it is important that every measure is taken to repair the damage as soon as possible.
“The diversion set up by police will add an extra 20 miles to the journey, and will mean those traveling along it will have to set off significantly earlier to make their destination on time.
"This will be a huge inconvenience and it is important that the level of disruption is minimised.
"“I am glad that the council has managed to get equipment in place swiftly to start the repairs, but I know that the many motorists who frequently use this route will be keen to see it repaired sooner rather than later.”
More top news
What has the weekend weather got in store for the Border region?
Do you know what's been happening in Cumbria and the south of Scotland over the past seven days? Test yourself in our weekly news quiz.
Two small creatures from thousands of miles away could create big problems for Cumbria's rivers.