Three lanes are now blocked and traffic is banked up past Pt Chevalier after a crash on Auckland's Northwestern Motorway this morning.
Emergency services are at the scene near the Newton Rd offramp, after the accident, involving a single car, left the right two lanes impassable.
Three lanes are now closed to help with vehicle recovery with tow trucks on their way.
The transport authority warned motorists to either delay their journey or expect to be held up citybound from the Causeway.
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Motorway cameras show vehicles inching their way into the city on the four-lane highway. with queues stretching back to the Causeway.
Waka Kotahi NZTA said the crash was blocking two lanes citybound between the Bond St overbridge and Newton Rd.
Motorists were told to merge left and pass with care.
Anyone using the motorway could expect further delays this morning, it warned.
A Fire and Emergency NZ spokesman said just one car was involved in the crash whch happened at 10.05am.
No one was trapped in the incident but it had resulted in major traffic disruption on the motorway.