A status yellow weather warning for fog is in place for the entire country.
The warning was issued yesterday by Met Éireann at 8am and came into effect at midnight last night.
The weather forecaster has left the warning in place until 10am tomorrow morning.
There is a risk of freezing in certain locations and dense fog has been reported this morning in the midlands and the west of the country.
Icy conditions have reported in north east with challenging driving conditions.
Foggy conditions in midland counties and parts of the west, with a Status Yellow Fog warning in place until tomorrow morning. Use your fog lights where needed, but don't forget to switch them off when they're no longer necessary. https://t.co/PSzIBsvOzE— AA Ireland (@aaroadwatch) December 6, 2020
Two collisions on the Carrickmacross Road, R178, in Co Monaghan, have been reported with Gardaí responding.
Both separate collisions involved two cars but resulted in no injuries.
The road is currently closed and is expected to reopen shortly.