The NZ Transport Agency says a truck has rolled just north of the East Tamaki Rd northbound onramp on Auckland's Southern Motorway (State highway 1).
Northbound traffic is down to one lane. However, all northbound lanes may have to be closed for the recovery of the vehicle. Drivers are advised to expect major delays and avoid the area.
Southbound traffic is unaffected.
The NZ Transport Agency works to create transport solutions for all New Zealanders – from helping new drivers earn their licences, to leading safety campaigns to investing in public transport, state highways and local roads. Follow us on twitter @nzta_news.