Repairs are to be carried out on a slope above the A9 in Caithness after a landslide earlier this year.
Around 60 tonnes of mud and rocks slid down the embankment onto the road on its most northerly stretch at Scrabster Harbour, north of Thurso.
Since then temporary traffic lights have been in place while engineers worked on a design to stabilise the slope permanently.
Work is now set to get under way next month.
Motorists are being warned to be aware of the ongoing work.
The road is heavily used by traffic accessing the harbour, including vehicles heading for the Orkney ferry which sails between the port and Stromness.
The landslide, containing mud, rocks and vegetation, came loose following heavy rain.
The repair works involve drilling metal pins into the embankment and securing specialist steel mesh, creating a stable area above the A9 to help mitigate against any future landslips.
The area will then be re-seeded so vegetation will grow over the mesh to blend in with the surrounding slope and add further stability to the slope.
The installation of the mitigation measures is expected to take up to four weeks to complete.
Once the repairs are finished the temporary traffic lights will be removed and the A9 fully reopened.
The work will be carried out by road management company Bear Scotland.
Eddie Ross, the company’s north west representative said: “Our engineers have been designing a solution for the slope and liaising with our specialist contractors to begin the repairs so that we can work to open both lanes of the road as soon as we can.
“The teams will do all they can to complete the slope stabilisation work as quickly and safely as possible.
“We thank motorists and the community for their patience while this is completed, and we’ll continue to liaise with the harbour authority, the Highland Council and local councillors to keep them informed.
“We’d encourage road users to plan their journeys in advance by checking the Traffic Scotland website for up to date travel information.”