The wreckage from a truck crash is still affecting State Highway One north of Welllington more than 12 hours after an accident this morning.
Photo: RNZ / Alexander Robertson
Northbound Ngauranga Gorge is reduced to two lanes.
At 9pm two southbound lanes will be closed and traffic will be diverted down a slip lane and back down to Newlands On Ramp.
There will be a full southbound closure between Newlands and Churton Park for approximately 20 minutes overnight to allow the truck to be towed away.
All lanes are expected to re-open by 5.30am tomorrow.
The New Zealand Transport Authority said the truck had damaged the median barrier and surrounding poles which had made it difficult to remove.