Police are appealing for a taxi driver and the driver of a Courier Post vehicle travelling on the north-western motorway this morning at the time a vehicle crashed to contact them.
The crash occurred at about 3am between the Newton Rd and Bond St over bridges in the westbound lanes. One male was taken to Auckland City Hospital with critical injuries.
One lane was kept open at all times and crash investigators worked to allow a second lane to be open by 7:30am as traffic flows began to increase.
One lane remains closed at the moment. Motorists are asked to consider using alternative routes to avoid that stretch of motorway if possible.
Acting Sergeant Stu Kearns of the Serious Crash Unit says, "We are looking for witnesses so would like the taxi and courier post drivers to come forward."
Acting Sergeant Kearns says, "Police believe another vehicle was involved in the crash and left the scene but at this stage say it would speculation to say what caused the crash."
Police are appealing for people to report any sightings of a white Toyota Levin on the motorway at about 3am this morning.
All inquiries
Jayson Rhodes
Communications Manager
North Shore/Waitakere/Rodney Police
027 281 0271