Multiple crashes have been reported in the Bay of Plenty and South Waikato this morning.
One person has critical injuries after a crash between a car and logging truck on State Highway 1, Lichfield.
A section of the highway was intially closed but has now reopened to one lane with stop/go traffic management in place.
Railway lines were also blocked.
A police spokeswoman said the crash, between Baldwin and Scriveners Rds, was reported at 10.02am.