Police are expecting a quieter morning in Canterbury with less ice to make the roads treacherous.
Southern Police spokesman Murray Hurst said there had been no call-outs for traffic incidents so far this morning.
He said drivers still needed to take care on the roads - especially further south.
"Christchurch isn't too bad...I would imagine down south around Dunedin Central Otago it'll still be icy."
Black ice caused one fatal crash in Canterbury on Tuesday, with more than 25 crashes occurring in the region throughout the morning.