Southern motorists are being urged to take extra care on the roads this time of year as areas of black ice emerge.

After yesterday's big freeze, light rain on the roads turned to black ice in the Otago Lakes area, and elsewhere in the district.

Police say although the roads look wet, and the sun may not be shining, this creates a false impression for drivers.

Incidents on the roads this morning include two vehicles that flipped on Malaghans Road in the Queenstown area.

These did not result in any serious injuries.