Snow banks on the Hill of Caragh
The Road Safety Authority (RSA) is warning drivers, particularly on motorways and dual carriageways, to be on guard for slabs of snow and ice falling or sliding off road side banks into their path.
Kildare County Council urged drivers to slow down in order to react in time to this hazard, and others posed by thawing snow.
"Drivers are also being urged to slow down to ensure the safety of motorway maintenance crews and vehicles who are vulnerable road workers in these treacherous conditions. The warning is being issued in conjunction with Transport Infrastructure Ireland (TII)," it said.
Met Eireann warned of the risk of extensive fog over the country this morning, especially over the midlands. Road users need to take extra precautions in such conditions, especially in areas badly affected by snow.
AA Roadwatch said conditions remain slushy on secondary routes around the county but otherwise main routes are passable.
The Barberstown Rd (R406) is reportedly down to one lane between Barberstown to Taghadoe due to snow.
Fog throughout the county added to delays through Clane, Naas, Kildare town, Newbridge, Maynooth and Sallins.