RICHMOND -- It could be several weeks until police know the cause of a one-car accident early Sunday that killed a Pittsfield woman, investigators said Monday.

The case has been turned over to the State Police Accident Reconstruction Team, which typically takes several weeks to complete an investigation, according to Massachusetts State Police spokesman David Procopio.

"Speed, weather ... they’re all under investigation," Procopio said.

The preliminary investigation suggests that the victim, Amy Cavanaugh, 36, was not wearing a seat belt at the time of the crash, he said.

Cavanaugh was traveling eastbound on Canaan Road early Sunday when her Jeep Cherokee entered a moderate counterclockwise curve and veered slightly to the left, Procopio said. Her vehicle then traveled along the shoulder of the road and a guardrail, then began to rotate counterclockwise to the left, before it made a sudden turn and went across the road’s east and westbound lanes. The vehicle then entered the north edge of Canaan Road, went onto a grassy area, and rolled over.

Cavanaugh, the lone passenger in the vehicle, was taken to Berkshire Medical Center, where she was pronounced dead.

It was snowing when the accident took place, and the roadway was dark, but the road conditions were dry, Procopio said, citing to the investigating trooper’s initial report.

The accident was the second major incident to occur on Canaan Road in the past week. On Nov. 26, a fire destroyed the home of longtime Richmond Selectman Roger Manzolini at 725 Canaan Road. The accident occurred near 151 Canaan Road, police said.

A graduate of Wahconah Regional High School, Cavanaugh was a past employee of New England Newspapers Inc., working in the circulation departments at The Berkshire Eagle and the Brattleboro (Vt.) Reformer.

Her father, William Cavanaugh, served 14 years on the Becket Board of Selectmen until 2011, said Town Administrator Edward J. Gibson.

According to her former colleagues at The Eagle, Cavanaugh had four children, and was predeceased by a son.

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