The snow and ice has started to ease after bringing roads to a standstill during morning rush hour.
Travel was heavily affected in many parts of Northern Ireland after heavy snowfall overnight.
Roads are expected to clear this afternoon but drivers are still being urged to continue to take extra care.
A two-vehicle collision at the Hillsborough road roundabout has been cleared and traffic is now moving normally between on the A1 between Dromore and Hillsbourgh.
There were reports of two lorries stuck at Sprucefield and seven lorries stuck on Main Street in Moira. Treacherous conditions were also reported on the Glenshane Pass.
Newtownstewart, Drumbo, Dromara, Hillsborough, Castlederg, Portaferry and Portavogie have all been hit by snow.
The BBC is reporting that two schools in Count Tyrone are closed because of the snow - St Joseph's Primary School, Galbally and Ardstraw Primary School, Newtownstewart.
Translink is reporting delays across its services and asking people to allow extra time for their journeys.
Rain and some hill snow are forecast from lunch time and strong to galeforce winds are expected to develop later in the day.