Motorists are being urged to drive with care this morning amid dangerous conditions.
Frost and ice is a problem again this morning on roads in counties Cork, Tipperary, Sligo, Mayo, Offaly, Louth, Meath, Kildare, Laois and Cavan.
Black ice has been reported around Longford Town and it is very icy in Co Donegal
Elsewhere, fog has been reported around Galway and Limerick city and there is freezing fog around Ennis in Co Clare.
Ice and fog are causing hazardous conditions around Mullingar in Co Westmeath and around Kilkenny city.