UPDATED 2.23pm: Police have advised the section of State Highway 29 between Omanwa Rd and Poripori Rd will remain partially blocked for at least another hour as they attempt to remove the truck.
Police issued a statement warning drivers to steer clear of the area if possible, but diversions were in place for Kamai-bound traffic.
The truck will be removed by heavy haulage equipment and the highway is expected to be closed while this is done.
EARLIER 1.42pm: Traffic is being diverted through Omanawa Rd and McLaren Falls Rd as emergency services worked to free the driver of a logging truck after a crash this afternoon.
Police Senior Sergeant Iain Chapman said the driver was reported to have minor injuries.
The driver had been trapped after the truck crashed into a ditch near Ruahihi Power Station about 12.45pm.
It is understood the driver was now free.
Police requested drivers avoid the area if possible.
EARLIER 1.20pm: The driver of a logging truck that crashed in the Kaimai Ranges is still trapped in the vehicle as emergency services work to clear the highway.
The crash happened about 12.45pm near the Ruahihi Power Station and traffic is now backed up for several kilometres.
Police northern communications Inspector Ian Brooker said the section of State Highway 29 would be closed.
Motorists are advised to use alternative routes until the scene can be cleared.
EARLIER: State Highway 29 has been shut down as emergency services respond to a crash in the Kaimai Ranges.
The crash happened about 12.45pm near Ruahihi Power Station.
Traffic is being diverted to Te Puna.
Police northern communications Inspector Ian Brooker said a logging truck has been involved in a crash. It was unclear at this stage if anyone was hurt.
Emergency services were about to close the road.