State Highway 1 at Otaki is now open in both directions after a truck and trailer unit crashed into a power pole earlier.
NZTA has advised the traffic signals are still out and significant delays remain.
Most power has been restored to the area after about a thousand Electra customers were left without.
The truck and trailer unit had earlier crashed into a power pole in Otaki, closing State Highway 1 in both directions.
The incident happened just before 5pm at the Mill Road roundabout.