Highland Council has said that Trac Enginering will start on remedial works to the rock face to the west of the avalanche shelter on the A890 Stromeferry Bypass today.
The work is set to take 12 weeks and the road will be diverted onto the adjacent rail line with some closures during the work to allow trains to pass, as well as overnight closures.
The council has said that it will take up to two weeks to build the road to rail diversion for cars and vans under 7.5t. Heavier vehicles will be diverted via the A87, A82, A832 and A890.
A council spokesman said: “We have worked closely with Network Rail and our contractor Trac Engineering to keep disruption to road users to a minimum when the road/rail diversion is in place but inevitably there will be times when road users will face longer waits so we urge people to plan their travel carefully and avoid the periods when the diversion is not going to be available.”