The NZ Transport Agency says motorists should expect major delays citybound on the Northwestern Motorway after a serious crash at the Great North Road Interchange.
All lanes citybound between Great North Road and Western Springs are closed to traffic along with the Great North Road on ramp.
Emergency services are at the scene and traffic is being taken off the motorway between these points.
One lane has now been opened just past the scene to allow vehicles that are already in the closure area to move clear.
The Transport Agency says the closure may be in place for some time and is advising motorists to delay their travel, avoid the area or expect long delays.
