Access to properties in Sulby Valley via Sulby
The Tholt Y Will Road is closed from the Bungalow to the Tholt Y Will car park, next to the former pub, until 3.30pm tomorrow.
It's for repair work to take place on the switchback corners between the car park and Sulby Reservoir.
The Department of Infrastructure says the work will also repair 'several failures' on the edge of the carriageway above the entrance to the reservoir.
On Monday, from 9.30am, the road will close again and reopen 24 hours later.
The DoI says the further closure is required to continue road repairs above the reservoir.
Access to properties in Sulby Valley will be via Sulby.