The NZ Transport Agency advises motorists heading north this afternoon to use the Western Ring Route, SH16 and SH18.
A serious crash has blocked all north-bound lanes of State Highway 1 on the North Shore, just after the Onewa Road off ramp.
Police are diverting north-bound traffic off the motorway at Onewa Road and traffic has built up back across the Auckland Harbour Bridge.
The Police serious crash unit is on the scene and it’s not known how long the motorway will be closed.
Police have begun allowing a few vehicles past the crash scene on the motorway shoulder, but traffic is heavy and the Transport Agency advises motorists there will be delays and to avoid the area.
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