Gloucester County Council is to start work on scaling back a large overhanging rock near Drybrook.
The large sandstone rock outcrop has deteriorated and falling debris blocked the road in January last year.
According to a report produced for the council by Amey Geotechnical, the rock outcrop “ranges from thickly laminated sandstone through to massive beds of conglomerate forming fining-up sequences. Due to the orientations of the bedding and jointing, the failure was likely the result of gravity.”
Amey advised that due to the likelihood of further collapse of the 10m outcrop, the preferred solution was to scale back the rock to a safe position to prevent further debris falls.
Other options considered included installng a rock mesh or rock bolts to prevent further collapse.
Geotechnical work has been carried out close to the current site in the past. Atkins designed soil nailed and gabion mattress remediation for the slope below the opposite carriageway following a washout in 2013.
Gloucester County Council cabinet member for highways Vernon Smith said: “Its great news that these safety works are starting.This type of work can be fairly dangerous but once finished, the road will be fully open and totally safe to use.”