"Emergency treatment" was last night required on roads across Fingal as temperatures dropped lower than expected.
Sub zero temperatures overnight were not expected in all areas leading to much ice on roads across the city - writes dublinlive.ie.
Fingal County Council last night got crews out across the region to grit the roads.
Road surface temperatures had fallen considerably below what was expected but routes were treated in the end.
Motorists are still asked to drive with care as the cold of overnight means many routes are still slippy.
The council said: "Road surface temperatures are significantly below forecast so emergency treatment is now required.
"Our crews have been mobilised and will commence salting roads across Fingal from 11pm tonight. Take care while driving."
Roads on high ground in the Dun Laoighaire Rathdown area were gritted overnight but motorists on all routes are asked to take care.
The council tweeted: "DLR will be gritting mountain routes only tonight winter ready. We would ask all road users to please take care and slow down ."
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