Auckland SH1 traffic resumes after truck carrying house collides with overbridge

Traffic has cleared on Auckland’s Southern Motorway after a truck carrying a small house collided with an overbridge earlier this afternoon.

Police said in a statement they were called to the scene between the Papakura and Manurewa-Takanini off-ramps near Conifer Grove on State Highway 1 at 3.25pm.

There were no reported injuries.

UPDATE 4: 50PM

All lanes are now open. Allow extra time for congestion to ease. ^KF https://t.co/jaCcBVkZXe

— NZ Transport Agency - Auckland & Northland (@nztaaklnth) January 4, 2026

New Zealand Transport Agency Waka Kotahi (NZTA) confirmed at about 4.50pm that all lanes have now opened.

According to Google, live traffic is now free-flowing.

Photos posted to social media showed debris from the small house strewn across the lane under the Walter Strevens Drive overbridge.

“Prepare for EXTRA long queues,” one Facebook user wrote.

“Someone hit the under part of the Conifer Grove bridge and there is debris over 2 lanes,” they said.

Debris from the collision lying across northbound SH1 lanes near Takanini. Photo / Emilie Mous

Passerby Emilie Mous described the extent of the crash site, saying there was “a huge amount of insulation, wood, small bits of glass, even some big panels that looked like a whole wall came off.

“It was easy to see from a distance and everyone was turning out of the slow lane, traffic turned very slow,” she said.

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