A 20-year-old Massachusetts woman died after being hit by a car as she was walking in a lane on Interstate 91 in Greenfield.
The Northwestern district attorney's office said the woman, who has only been identified as a Greenfield resident, was walking in the right-hand travel lane when she was hit from behind.
The driver involved in the pedestrian crash stayed at the scene and is cooperating with the investigation.
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The Office of the Chief Medical Examiner will determine the woman's cause of death.
The investigation into the crash is ongoing.