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Cleanup crews are working on a section of State Highway 1 on the Kapiti Coast after a section of the highway was washed away overnight.
The road between Pukerua Bay and Paekakariki was closed about 12.30am this morning after heavy seas caused by Cyclone Gita washed away a portion of road and damaged the guardrail and footpath.
NZTA said at 7am the highway had been re-opened to one lane with a stop/go operator in place.
Police said considerable delays are expected in both directions.
The Paekakariki Hill Road is available as a detour, but Police warned that only light vehicles could use it.