The NZTA also warned of strong winds affecting high-sided vehicles and motorbikes on SH2 and SH50 in the Takapau Plains around Hawke's Bay.
READ MORE
• Weather: Rug up before you head out today - it's going to be wet and cold
Snow has also closed roads in the South Island this morning. Ice and snow have closed SH7 between Reefton and Hanmer Springs, Takaka Hill (SH60) between Takaka and Riwaka, SH8 between Milton and Raes Junction and the Waikaka Valley Highway (SH90) from SH1 just outside Gore through to Raes Junction.
Heavy snow has also closed SH85 from Kyeburn to Palmerston, SH87 from Middlemarch to Outram and SH93 between Mataura and Clinton.
SH94 is closed between Te Anau and Milton due to snow but remains open between Te Anau and Fiordland Park Boundary. Chains must be carried.
Road snowfall warnings are also in place between Napier and Taupo (SH5), the Remutaka Hill Rd (SH2), Lindis Pass (SH8), the Crown Range Rd (Queenstown-Wanaka) and the Dunedin to Waitati Highway (SH1).