Penlink construction has moved past one million cubic metres of earth, with February night diversions set for SH1.

Teams returned on Monday, January 5, to keep building the new highway linking Whangaparaoa with State Highway 1.

Much of the progress is in earthworks that are not easy to see from the road.

A behind-the-scenes video features the engineers working on this stage.

In February, work continues on the new SH1 connection near Ara Weiti Road.

A base for future signage over SH1 is planned, along with removal of temporary barriers and installation of permanent concrete barriers.

Northbound lanes on SH1 will be closed at night for about three weeks, with northbound traffic diverted between Oteha Valley Road and Silverdale.

Hibiscus Coast drivers should also expect short-term one-lane sections on key local routes.

East Coast Road will drop to one lane for about one week during daytime hours in mid-February.

In Stillwater, part of Duck Creek Road will run as a single lane under traffic lights while a retaining wall and drainage are built.

In Whangaparaoa, some nights will see parts of Whangaparaoa Road reduced to one lane for wastewater pipe installation and asphalt works.

Other February work includes bridge construction over East Coast Road, stormwater pipe installation along Ara Weiti Road, base layers for the new motorway offramp, and widening of Ara Weiti Road.

A 104 metre concrete retaining wall is also starting in Whangaparaoa, alongside base layers and underground services visible from Whangaparaoa Road.

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