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ARLINGTON -- A serious traffic accident in the westbound lanes of Interstate 20 west of Highway 360 snarled rush hour traffic on Wednesday afternoon.

Police said a woman lost control of her sport utility vehicle, causing it to roll over. It came to rest on the driver's side near the median; the driver was trapped inside.

Firefighters cut off the entire roof of the SUV to help get her out.

A medical helicopter landed on the highway to take the driver to a hospital for treatment of serious injuries.

The accident cleanup kept traffic tied up for hours.

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