Authorities say 58-year-old Jane Sagen from Madison was the woman who died in a crash in the town of Blooming Grove Saturday morning.
Dane County Sheriff's Lt. Kurt Pierce said nine vehicles, including one motorcycle, were involved in the fatal accident at Highway 30 near Highway 151.
The State Patrol said the crash happened at 6:58 a.m.
A motorcyclist was headed eastbound on Highway 30 when he was involved in a crash with Sagen's vehicle, according to the report.
Sagen was then struck and killed by a third vehicle when she got out of her car. A chain reaction crash followed, involving seven more cars. A total of nine vehicles, including the motorcycle, were involved in the crash.
Traffic was blocked in both directions for about five hours. The roadway was reopened at 11:53, traffic officials said.
Piece said deputies believed bright morning light may have caused the crash.
"It appears that the primary cause was sun glare, as the vehicles were traveling eastbound directly into the sun," Pierce said.
Four people were taken to the hospital for non-life-threatening injuries, officials said.
Pierce said the sheriff's department is still investigating the crash.
A witness told the sheriff's department that a dark-colored vehicle was seen directly in front of the victim’s vehicle at the time of the crash. Detectives are asking anyone who may have information about the crash to call the Dane County Sheriff’s Office tip line at 608-284-6900.