Police are advising motorists travelling along State Highway 29, west of Te Poi there are significant delays following a crash.

Police were alerted to a truck and trailer unit that rolled at around 5.40pm.

"The driver is uninjured, however, there are going to be significant traffic delays for some hours for commuters travelling west on SH29," says a police spokesperson.

"A heavy duty crane is removing the unit and traffic management is in place.

"We thank motorists in advance for the patience."