Image: NZTA Waka Kotahi
"Initial indications suggest there are serious injuries. The road is closed while emergency services are in attendance," police said in a statement.
Police were called to the crash on State Highway 1 between Woodlands and Dacre at around 8.10am.
The road was closed while emergency services are in attendance and remained closed at 11.30am, NZTA Waka Kotahi said.
A detour is available: northbound traffic can turn left onto Grove Bush-Woodlands Road, right onto SH98/Lorne-Dacre Road and then left back onto SH1/Edendale-Woodlands Highway.
The reverse applies for southbound traffic.
