Traffic is flowing at a slow pace because of the lane restrictions.
Those who were affected had to be rescued by members of the South African National Defence Force, offering them shelter and food.
It is expected that by midday or later this afternoon, the snow would have completely melted in the affected areas.
According to the South African Weather Service, cold weather is expected to continue in the area until tomorrow.
The highway was closed from the Wilge Toll Plaza near Villiers in the Free State, to the Tugela Plaza in KwaZulu-Natal. - BuaNews
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