Both lanes on Auckland's Tamaki Drive have reopened following a king tide that caused significant surface flooding along the waterfront route.
Police had urged motorists not to use the road tonight because of a risk of flooding when the king tide was due to peak at 8.45pm.
They urged motorists to avoid the area altogether or take alternative routes.
A Herald photographer saw significant surface flooding but it did not prevent vehicles from passing through.
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He said roading authorities were monitoring the situation.
A police spokeswoman said one lane was briefly closed but had since reopened and there had been no crashes reported as a result of the flooding.
A Fire Service spokesman said they, too, hadn't had any calls relating to the flooding.
King tides are especially high tides that occur when a new or full moon coincides with the time that it is at its closest to Earth.