As well as the motorway accident, Dunedin police have been kept busy with a series of crashes including a car that slid down a bank on Brighton Road and a vehicle that rolled on Portobello Road near the Cove.
Another car slid into a parked vehicle on Union St.
Forecasters and police had warned black ice after yesterday's snow could prove dangerous for motorists in the south today.
MetService meteorologist John Law said any water on roads in Otago, Southland and Canterbury will have frozen overnight and will be hard to spot on the roads.
"It freezes really clear over the road, making it look black.
"Extra precautions will need to be taken," Mr Law said.
Temperatures reached below freezing for much of the country overnight and in to this morning.
Dunedin primary schools had a delayed start this morning because of icy driving conditions.
And it's not just the bottom of the country suffering from chilly temperatures.
John Law said Auckland recorded a low of 4.5C before dawn this morning, Wellington got down to 5C, while Hamilton was -1C before dawn.
Meanwhile, the coldest places in the South were Tekapo, which recorded -6C overnight, Queenstown -5C, Christchurch -4C and the Central Plateau of the North Island was -5C.
Today would be a calm, fine and cold day for most of the country, Mr Law said.
