Dorset Police have said that a landslide on a route identified as high risk two years ago has led to closure of the route.
Dorset County Council closed the road at Dinah’s Hollow in 2014 after ground stability assessments suggested that failure of the cutting could potentially engulf a vehicle.
The route was reopened last year under traffic management while £4M plans to stabilise the embankments using soil nailing was finalised, however, the landslide earlier this week has led to the route being closed to traffic again.
DCC has said that 30t of debris had collapsed onto the carriageway and dislodged concrete barriers. The council has indicated that it plans to remove the debris to allow the route to reopen but no comment has been made on the stability of the rest of the cutting following the incident.