A Novato woman leaped to her death from the Highway 101 overpass at Atherton Avenue in Novato Monday morning, according to California Highway Patrol.

The apparent suicide prompted authorities to close all northbound lanes of the highway, causing an extended backup during peak commute hours.

Sally Kinn, 55, apparently jumped from the overpass onto the northbound lanes at approximately 7:15 a.m. She was struck by a vehicle.

The Marin County Sheriff's Office released Kinn's name after 3 p.m. Monday.

"She drove her car onto the Atherton overpass, stopped, got out and walked over to the side and went over the railing onto the roadway below," said CHP Officer Andrew Barclay.

"This is extremely rare," he said.

The driver of the vehicle that struck Kinn was transported to an area hospital suffering from shock, according to CHP Officer Ron Simmons.

All northbound lanes were closed to traffic until 10 a.m.

Vehicles were rerouted off the highway at Atherton Avenue and were able to re-enter the roadway nearby, Simmons said.

Southbound traffic was unaffected by the closure but was slow Monday morning.

The Marin County Coroner's office is investigating the death.