The Department of Infrastructure has received reports of motorists driving on the closed section of the Mountain Road.
The route is closed from Ramsey to the Bungalow due to the risk of land slips.
It’s not expected to re-open until Tuesday at the earliest.
The DOI is reminding the public that it’s an offence to use a road if barriers and a road closure sign is in place.
Repairs on Peel Power Station to get underway
Manx Care doctor survey to be discussed by Tynwald
Weather warning for snow tonight
MHK queries safety at primary school in Ballabeg
Gales put two ferry sailings at risk tonight
Should the Island throw a birthday party for Barry Gibb?
Warning issued over icy roads
High ground could see 4 inches of snow on Saturday night