UPDATED 2.03PM: A drawbar of a logging truck is blocking one lane of State Highway 29, 1km from the Kaimai Range summit.

A photographer at the scene says police and ambulance are at the scene of the crash.

"It's near a passing lane, so traffic is flowing freely. The truck has crashed into a bank and is mostly off the road."

Emergency services are working to clear the scene.

EARLIER:

A truck is reported to have crashed on State Highway 29, near the Kaimai Range summit.

A caller to the 0800 SUNLIVE news hotline says police are speaking with the driver of the crashed truck, which is 1km from the summit, on the Tauranga side of the Kaimai Range.

"One lane of the highway is blocked.

"People should expect delays."

NZTA says the crash is blocking the westbound lane.

"Expect delays and pass the scene with care."

SunLive is working on getting more information.

At the scene?

Call 0800 SUNLIVE or email photos to newsroom@thesun.co.nz