Police closed a section of the the Mailors Flat-Koroit Road between the Caramut Road intersection and Sims Road following the trailer rolling around 10.30am on Tuesday.

The incident involved one vehicle and no one was injured.

Warrnambool Highway Patrol Senior Constable Sharni Walters said the truck was northbound on the Caramut Road and turned left onto Mailors Flat-Koroit Road when the trailer tipped.

Heavy haulage is attending to upright the rolled trailer.

"All the freight is still in the trailer, but the road will still be closed fora short time while they try and roll it onto its correct side," Senior Constable Walters said.

She said police were still investigating the cause of the incident.

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