The A83 has been closed at the Rest and Be Thankful as a safety precaution, with traffic being diverted via the Old Military Road.
Road operator Bear Scotland said the measures were being taken as weather conditions in the area worsen, with sustained heavy rain forecast throughout the day.
Geotechnical teams are currently on the site to monitor conditions.
Due to worsening weather conditions in the area all traffic is now being diverted via the Old Military Road local diversion route as a safety precaution, with the A83 closed at the Rest.
Geotechnical teams are onsite monitoring conditions in the area. pic.twitter.com/exGKPTNvws
— Traffic Scotland (@trafficscotland) September 30, 2020
Eddie Ross, BEAR Scotland’s North West Representative said: “Heavy rain has been impacting the area since early morning and with more forecast throughout the day we’ve taken the decision to divert all road users via the Old Military Road local diversion route as a precaution.
“Our geotechnical experts have advised that the rain could have an impact on the hillside so we’ve taken a safety-first approach and our teams will continue to carefully monitor the area throughout the day.
“Safety of road users remains our top priority and we’ll do everything we can to ensure any disruption is minimised as much as possible.”
The stretch of road has been forced to close several times over the summer due to landslips caused by adverse weather.
Most recently, it closed around a week ago after thousands of tonnes of debris fell down the hillside and onto the vital route.