A truck has rolled on the alternative route around the closed Manawatu Gorge.
The crash happened on Saddle Rd, Woodville, in the Tararua District, at 7.30am.
No one was injured.
However, the road would be closed for at least six hours from 9am while the vehicle was righted and removed.
Police adivsed motorists to use the Paihiatua Track, the sole remaining route through the region after the Manawatu Gorge was closed indefintely in October.