The Mountain Road has now re-opened to traffic.
The Department of Infrastructure says the Creg Ny Baa back road is also open and the Beinn Y Phott Road is passable with care.
The Tholt Y Will Road is open and is reported to be passable with care from the Bungalow to the reservoir car park, with conditions improving below this.
A further weather warning for ice and wintry showers is set to come into force at 9pm tonight.
Steam Packet sailings delayed tonight
PPE Medpro put into liquidation
Part of TT course closed tomorrow
Carl Cox backs cancer charity's TT fundraising auction
Business appeal over thousands in unpaid bills
Pharmacy plans for former IOM Bank
Appeal after wood from van damages car
Island part of union data breach investigation