A man has died in a one-car crash on the Ballygowan Road at Saintfield.
The 44 year-old died after crash shortly before 6.20am. It is not clear at this stage what caused the crash.
He is the sixth person to die on Northern Ireland’s roads in the first two weeks of the year.
On Saturday police declared a road safety emergency.
Police warned of icy conditions on many roads across Northern Ireland on Monday.
The Ballygowan Road at the junction of the Belfast Road and the Carsontown Road area reopened just after 1pm.
Roads Service reported just after 6am that the main routes had been salted and were “generally free of ice”, but warned that the risk of icy patches remained.
By 8am there had been reports of collisions in Markethill and the A1 at Lisburn also.
Motorists were warned to avoid the main Armagh to Newry Road after an incident on the Gosford Road, Markethill.
The A1 has been reduced to one lane between Hillsborough Road roundabout and Sprucefield due to a collision, meaning there were delays towards Lisburn.
Police also advised of icy roads in Lurgan and Craigavon, and have urged motorists to use “extreme caution”.
There are long tailbacks on the Drumgask Road.
For the latest traffic and travel visit http://trafficwatchni.com/home.