Bear Scotland has been working at the site, which has been closed on a number of occasions for the safety of workers and road users amid ongoing heavy rainfall.
Bear confirmed that a local diversion on the Old Military Road at the Rest and Be Thankful will remain open overnight tonight following an assessment of the hillside.
The route, which runs parallel to the A83 through Glen Croe, will remain under close review throughout Friday as heavy rain is forecast to move in throughout the day.
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Teams will remain onsite to monitor weather conditions in the area and observe the hillside for any changes.
Eddie Ross, BEAR Scotland's North West Representative said: "The OMR is currently in use for all road users and is operating well as a local diversion through Glen Croe.
"The route will remain open overnight tonight and throughout the day tomorrow however we'll be keeping the OMR under close review.
"More rain is forecast for tomorrow and Saturday and we'll be closely monitoring conditions in the area as well as the hillside to note any changes.
"Teams continue with work to install landslip mitigation measures on the hillside above the A83, with engineers working 24/7 to complete the work.
"As ever we thank all road users and the local community for their patience while we do everything we can to safely manage the ongoing situation at the Rest."
