State Highway 1 is closed again near Waihola to allow for vehicle recovery after a truck crash left one person critically injured earlier today.
Emergency services were called after a truck and trailer rolled, on the highway between Titri and Bungards Rds, about 11.55am.
"One person has critical injuries," police said in a statement.
The injured person was airlifted to hospital.
The highway was closed for about two and a-half hours, then reopened, but was closed again about 4.40pm to allow for vehicle recovery, NZ Transport Agency Waka Kotahi said.
At 6pm NZTA said the road was still closed and was likely to remain so for several hours.
Diversions were in place but were not suitable for heavy vehicles.