A truck has crashed into an overbridge on the Southwestern Motorway, SH20, this morning causing delays for motorists.
A large amount of debris is scattered across the southbound lanes - with a clean up operation causing temporary lane closures.
The centre lane southbound is currently blocked.
NZTA is warning motorists to take extra care and to expect delays through this area until the road is fully cleared.
Police are in attendance and no injuries have been reported.
Auckland Transport has also warned that several bus services, including school buses, should expect "significant delays" in the area.
The southbound lanes were closed around 10.30am for a clean up operation.
As of 12.10pm, two southbound lanes remained closed. The clean up is expected to last beyond 2pm.
Police could be seen cordoning off a street in the area.