A Met Eireann cold weather alert is in effect until midday.
Icy stretches and patches of freezing fog are making driving conditions really difficult for motorists.
Temperatures plunged to as low as -2 degrees Celsius overnight.
A Met Eireann cold weather alert is in effect until midday.
It's a yellow low temperature and ice warning.
Alan O'Reilly, from Carlow Weather, says conditions are treacherous in places:
Temperatures dipped as low as minus 7 degrees Celsius in parts of the midlands overnight.
Met Éireann says the current Arctic airflow will bring sharp to severe frosts and icy stretches until Thursday, along with showers of hail, sleet, snow and freezing fog.
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