Snow and ice has forced the closure of the Desert Road.
In a a tweet NZTA confirmed State Highway One's closure between Waiouru and Rangipo.
They say there's a detour of State Highway 46 and State Highway 47 to National Park.
Crown Range closed
In the deep south the Crown Range is closed to all vehicles this morning due to heavy snowfall overnight.
The Queenstown Lakes District Council says snow is falling in Arrowtown, Dalefield, Arthurs Point, Queenstown Hill and Fernhill.
Extra caution is needed on the road's today and snow chains are essential.
Warnings are in place for all of the Alpine Passes.
Other road closures
SH6 Haast to Makarora; SH94 Hollyford Valley Road intersection to Chasm Street Bridge; SH73 Arthurs Pass to Otira is now closed to all towing vehicles due to snow. All other vehicles are required to have chains.
Snow warning for the the following roads
SH6 Cromwell to Gibbston; SH6 Omamarama to Tarras; SH94 Mossburn to Te Anau