Hard frost overnight has left some roads in a treacherous condition this morning.
The AA said road temperatures dropped to almost -4C in Cork on the N72 Mallow-to-Dungarvan Road through Fermoy, while in the west of the temperatures dipped to -3C on the N63 Roscommon-to-Galway Road.
Black ice is reported around Rathangan, in particular on the Edenderry Rd (R401).
Particular care is also advised in Kildare, Westmeath, Longford and Sligo.