One person was seriously injured in a crash involving a van and truck outside Upokongaro School and State Highway 4 was temporarily closed.
A police spokeswoman said the crash happened at 8.40am.
Speaking at the scene, Constable Stu Bourne said the collision was between a truck and van.
The man driving the van had his legs trapped as a result of the crash and had to be removed from the vehicle by Fire and Emergency.
The man was the sole occupant of the van.
"He's fully conscious but I'd say he'll be going up to Whanganui Hospital," Bourne said.
A reporter at the scene said it appeared both vehicle had been heading north on SH4.
Lyana Gascoigne, who works at Upokongaro School, said no staff or students were involved and everyone arrived at school safely.