UPDATED - 1.52pm - The man who died when his truck plunged down a steep bank in the Kaimai Ranges has been named. He was Athol Ian Bree, 61, of Te Awamutu.
Mr Bree's truck left the road on the Matamata side of the Kaimai Summit, taking out a safety rail and plunging 10 - 12m.
The section of State Highway 29 will be reduced to one lane until about 3pm today as contractors work to remove the truck.
Traffic is flowing well through the single lane.
UPDATED - 11.19am - State Highway 29 on the Matamata side of the Kaimai Summit will be down to one lane until about 3pm today, following a truck accident last night.
NZ Transport Agency (NZTA) says contractors are working as quickly as they can to remove the vehicle while ensuring the safety of the crew and traffic in the area.
State highway manager Brett Gliddon asked motorists to take care when travelling through the area and expect delays.
"There will be traffic controls and signage in place. We thank people for their patience while this work is being done," he said.
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A man has died after the heavy truck he was driving plunged off the rain-soaked summit area of the Kaimai Ranges.
The man was travelling along State Highway 29 and began heading down the Matamata side of the ranges when his six-wheeler left the road and careened 10 to 12m down the steep bank about 6pm yesterday.
Emergency services from Tauranga and Matamata responded to 111 calls, reporting a large truck had crashed.
St John ambulance paramedics navigated the sodden, steep bank down to the man but were unable to save him.
The man died at the scene.