State Highway 5 was closed between Waimakariri Rd and Harwoods Rd in Tapapa.
NZTA advised motorists to delay their journey or use an alternative route through the area.
The Serious Crash Unit will examine the scene.
SH5 TAPAPA - SERIOUS CRASH - 2:45PM A serious crash has CLOSED a section of #SH5 between Waimakariri Road and Harwoods Road in Tapapa. Please delay your journey or use an alternative route. Updates here: https://t.co/OreU2yPCDx. ^MF pic.twitter.com/95f3ctOVwM
— Waka Kotahi NZTA Waikato/BoP (@WakaKotahiWaiBP) July 12, 2019