Emergency services are working to free a logging truck driver left trapped in his cab after a crash on the Bay of Plenty side of the Kaimai ranges.
The early afternoon crash on SH29 left the truck in a roadside ditch and one lane blocked by logs strewn across the road.
Although one lane is open at present, police said they may close the road when heavy equipment arrives to clear the scene in about an hour.
The driver suffered minor injuries and was reported to be conscious.
There are significant delays and motorists are advised to seek alternative routes.