Charges could be laid after a truck and digger crashed into an overbridge, causing chaos on Auckland's main motorway for several hours on Monday.
At 1.15pm, the arm of the digger struck the Penrose overbridge, causing it to be knocked off its trailer on to two southbound lanes of the Southern Motorway.
Waitemata Police are investigating the incident.
The Waitemata Police Motorways team are reviewing CCTV footage and statements taken from witnesses and those directly involved in the crash.
Police have confirmed that the load was overheight and witnesses have described seeing the high-visibility LED early warning signs activate as a result, on the driver's approach to the bridge.