State Highway 1 on the Brynderwyn Hills in Northland to has reopened to both lanes of traffic this morning.
The road was reopened at 10.15am, the New Zealand Transport Agency said.
Temporary speed restrictions of 50km/h on the stretch would in place for the next week.
NZTA regional journey manager Jacqui Hori-Hoult said it had been a huge team effort to reapir the damage done to the road.
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 was flowing well on a temporary SH1 diversion around the Maromaku slip near Kawakawa through SH1, and SH12 at Kaihu was open to a single lane.
