Temperatures fall to record low
Northern Ireland motorists have been facing further problems as severe weather conditions continue.
Temperatures plummeted to the coldest on record for November in Northern Ireland. The lowest reading was at Lough Fea which dropped to -9.5C (14.9F).
The next coldest temperature was -9C (15.8F) recorded in 1978 at Murlough.
The Roads Service warned of extremely hazardous driving conditions and advised drivers to exercise caution.
In a statement they said all of the scheduled network has been salted.
However, the risk of ice remains, particularly on unsalted roads.
Further flurries of snow are expected across Northern Ireland on Sunday.
On Saturday, the main road between Coleraine and Limavady was blocked by snow.
The 212 Ulsterbus service between Belfast and Derry was withdrawn for the night due to the icy conditions on the Glenshane pass.