Emergency services were also attending a crash involving a motorcycle and vehicle on Manukau Station Rd near the on ramp to the Southwestern Motorway.
The crash, just outside a police station, has now been cleared
Police said one person had been seriously injured and had been taken to a hospital.
Cordons have been set up at the intersection and traffic is being diverted.
The Serious Crash Unit is investigating.
Delays were being reported across Manukau and motorists were advised to avoid the area if possible.
Southern Motorway
Heavy between Newmarket and Greenlane again at the South-western link, traffic building through Takanini Mt Wellington and Greenlane.
Northern Motorway
Heavy between Wellington St and Upper Harbour Highway again from Oteha Valley to Redvale and heavy at Greville Rd approaching the Harbour bridge for citybound traffic.
Northwestern Motorway
Heavy from St Lukes Rd to Lincoln Rd for westbound.
Slow from Greenhithe bridge on Upper Harbour Highway to Royal Rd, after an earlier crash.
Southwestern Motorway
Heavy between Roscommon Rd and Neilson St for northbound.
Heavy between George Bolt Memorial Dr and Massey Rd again approaching the Southern link for southbound.