It's in place until 4pm this afternoon.
A status yellow freezing fog warning has been issued for 19 counties.
It's in place in Munster, Galway, Roscommon, Carlow, Dublin, Kildare, Kilkenny, Laois, Longford, Meath, Offaly, Westmeath, Wexford, Wicklow until 4pm.
Met Eireann say patches of fog will persist causing hazardous driving conditions.
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