Northbound traffic will turn left off SH1 to SH49 at Waiouru, right on to SH4 at Tohunga Junction, right on to SH47 at National Park, right on to SH46 at Tongariro and finally left back on to SH1 at Rangipo.
NZTA says the detour will add at least 40 minutes to motorists’ journey time.
Hato Hone St John has been contacted for information.
Finn Williams is a multimedia journalist for the Whanganui Chronicle. He joined the Chronicle in early 2022 and regularly covers stories about business, events and emergencies. He also enjoys writing opinion columns on whatever interests him.