State Highway 1 on the Brynderwyn Hills is now open

Final touches being made to SH1 Brynderwyn Hills before it was opened to traffic. PHOTO/Michael Cunningham

The NZ Transport Agency has re-opened State Highway 1 on the Brynderwyn Hills in Northland to both lanes of traffic.

The road was re-opened at 10:15am today, with pavement works carried out overnight and road markings and temporary speed restriction signs erected this morning.

The pavement works were finished at 4am this and the teams were able to arrange for the road marking at the same time.

Temporary speed restrictions of 50km/h will in place through this section of road for the next week to ensure the safety of motorists and contractors.

Transport Agency Regional Journey Manager Jacqui Hori-Hoult said NZTA staff and contractors had worked tirelessly in a challenging environment to re-establish the vital SH1 link for the region.

Ms Hori-Hoult said in addition to workers from Opus and Downers, the job involved 20 different local subcontractors as well as technical advisors and traffic control crews from Tauranga, Hamilton and Wellington.

"This has been a huge team effort to keep Northland moving and we are thankful to the people of Northland for their patience and understnding as we've worked to repair the damage caused by this wild weather."

The highway was closed when heavy rain last weekend caused an underslip affecting 20 metres of the main road link between Northland and Auckland.

Elsewhere in the region traffic is flowing well on the temporary SH1 diversion around the Maromaku slip near Kawakawa through SH1, and SH12 at Kaihu is open to a single lane.