An Auckland woman who was seriously injured after a truck crash on the Kaimai Range is now stable in hospital.

A Bay of Plenty District Health Board spokeswoman said the woman from Auckland remained in Tauranga Hospital in a stable condition, while the other person who was injured had been discharged.

A crash between a truck and a car left State Highway 29 over the Kaimai Range completely blocked yesterday afternoon after a truck rolled.

After several hours, State Highway 29 was reopened at 7.20pm following the crash.

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One person was transported to Tauranga Hospital in a serious condition and another in a moderate condition following the crash.

A police spokeswoman said police were called at 1.40pm following reports of a truck and trailer unit crash with a car.

The road was "completely blocked", diversions were in place and motorists could expect delays, police said.

Diversions were still in place at 3.55pm and a crane had just arrived at the scene to remove the truck.

A police spokeswoman said the crash happened between Ruahihi and Omanawa Rd in Lower Kaimai.

A Fire and Emergency NZ spokesman said one person was trapped after a truck rolled on the Kaimai Ranges.

He said crews got the call out about 1.40pm and three fire appliances were at the scene.

St John's spokeswoman said one person in a serious condition and one in a moderate condition were transported to Tauranga Hospital.

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Two ambulances and one rapid response vehicle were sent to the scene following the call at 1.41pm she said.