There was a crash on State Highway 3, blocking one lane, near Kaitoke on Wednesday afternoon.
Emergency services were alerted shortly after 3pm to the crash on SH3, between Pauri Rd and Concord Line.
Two cars were involved in the crash.
A Fire and Emergency spokesperson said crews arrived to find a trailer attached to a car rolled over.
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There were no reported injuries.
Fire and Emergency were assisting with traffic management, and the road was down to one lane for about an hour.