Police have confirmed the Mountain Road will remain closed tonight.
Authorities say despite the DOI's best efforts, they've been unable to clear the hazardous conditions in place on the highway.
The A18 has faced closures over the last few days due to snow, ice and frost experienced on Island.
Meanwhile, a yellow weather warning for frost has been extended until 6am tomorrow.
Glen Maye requisition meeting scheduled
Viking longboat races today
Postal vote applications have to be in soon
Mum launches petition over university support
Bus services north and south face disruption later
Wildlife Trust unveils woodland plans
Deadline looms for by-election nominations