Authorities has released the name of the woman who died Friday in a head-on crash on Route 2 in Etna.

Debra Calderwood, 73, died in the approximately 3:15 p.m. collision with fellow Etna resident, Richard Lupo, 31, Penobscot County Sheriff Troy Morton said Monday.

Calderwood was traveling east toward Carmel in a 2009 Honda Fit, and Lupo was driving west toward Newport in a 2009 Dodge Caliber when the vehicles crashed, he said.

At the time, Lupo was driving in the passing lane, though he was not passing anyone, Morton said.

“He was traveling in the passing lane and somehow collided with Calderwood,” Morton said.

Authorities are investigating whether Lupo crossed the centerline, the sheriff said.

An accident reconstruction specialist spent hours Friday investigating the scene, near the intersection of Stage Road and Route 2, also known locally as Reynolds Road.

Lupo was brought to Eastern Maine Medical Center and remained there Monday, Morton said. Morton did not know the extent of Lupo’s injuries.

He is listed in fair condition, a hospital spokeswoman said Monday.

Calderwood and Lupo were traveling without passengers when the crash occurred.

A memorial service for Calderwood will be held 1 p.m. Saturday at Ellingwood Corner United Methodist Church, where she was a volunteer.