A logging truck with a trailer has rolled, partially blocking the road in Auckland's Botany Downs today.
Police said the crash happened near the intersection of Botany Road and Cascades Road, just before 4am.
One lane was blocked and diversions were in place.
It was not known when the road would be cleared but motorists are asked to use alternate routes if at all possible.
There was only one vehicle involved in the crash and the driver was not seriously injured, police said.