A trailer has flipped in high winds on the Rimutaka Hill north of Wellington, prompting police to urge motorists to take care in the extreme conditions.

Police said emergency services attended after the trailer flipped over while being towed over the hill today.

No one was injured in the incident, police said.

Police and the New Zealand Transport Agency (NZTA) were advising high-sided vehicles and motorbikes against using the road.

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Updates on road conditions can be found on the NZTA website.