There will be freezing fog over the northern half of Ireland this morning with a Status Yellow alert in place for nine areas.
The warning is valid for Connacht, Cavan, Donegal, Monaghan, Longford, Louth, Meath, Offaly, Westmeath until 10am on Tuesday.
Met Eireann warned that road conditions will be "very hazardous", particularly on minor roads, with icy conditions in many parts of the country.
