Illustrated map showing the detour route on State Highway 1 north of Auckland between Oteha Valley Road on-ramp and the Silverdale Interchange.

Motorists are advised the southbound lanes of the Northern Motorway (SH1) between Silverdale and Oteha Valley Road will be closed overnight for maintenance and resurfacing for eight nights, starting Monday 2 December.

The southbound lanes will be closed from 10pm until 5am on Monday 2 December to Wednesday 4 December and on Sunday 8 December to Thursday 12 December. The Silverdale southbound on-ramp will be closed from 9pm until 5am.

This closure is required to carry out maintenance tasks, including resurfacing, on the motorway.

There will be a sign-posted detour via East Coast Bays Road during the closures.