UPDATED: Arlington Woman Injured in Route 128 Crash in Waltham

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UPDATE, 11:30 a.m. (Sunday, June 3): State Police have identified the driver as Julie Dumas, 39, of Arlington.

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A 39-year-old Arlington woman sustained serious injuries on Saturday, June 2, in a car crash on Route 128 in Waltham.

The woman was driving south at around 10:45 a.m. when her car, for unknown reasons, suddenly swerved from the far left lane into the guardrail on the right side of the road, according to a State Police spokesman. Her vehicle, a 2009 Honda Pilot, then swerved back to another lane, hit a tractor-trailer truck and hit the guardrail again. Her vehicle rolled over the guardrail, and she was ejected from the vehicle. The accident occured under the Route 20 bridge. 

Waltham Fire Department paramedics treated the victim on the scene and transported her to Beth Israel Deaconness Hospital in Boston, according to police. 

The driver of the truck was Rosen Helge, 49, of New Brunswick, Canada, and the truck is owned by AYR Motor Express, a Canadian company, according to police. Helge was not injured. The truck was hauling tires. 

The State Police Accident Reconstruction Team as well as the Crime Scene Photo Unit responded the scene. Also, the state Department of Transportation responded to the scene to block two of the road's lanes until the scene cleared at 1:25 p.m. 

The accident remains under investigation.