UPDATED 9am: Power is out for the Whakamarama shops after a truck hit a transformer this morning.

Wires have been exposed on the side of State Highway 2, near Barrett Road, and Powerco have estimated the power could be out until lunchtime at the earliest.

Power is expected to be out until lunchtime for Whakamarama's shops. Photos: Andrew Campbell.

Police are currently at the scene and a reporter says there is significant damage to the transformer.

It's understood the truck is no longer at the scene.

No other vehicles were involved.

Meanwhile, emergency services are at the scene of a single vehicle crash on Omanawa Road, 1km from the State Highway 29 intersection.

A caller to the 0800 SUNLIVE news hotline says the car rolled several times.

It's believed the female driver, who was on her way to work, is out of the vehicle and is not injured.

St John Paramedics have been called to the scene as a precaution to check the condition of the driver.

As well as the incident involving a truck, this car is reported to have rolled "several times" on Omanawa Road. Photo: Andrew Campbell.