Alonso was pronounced dead at the scene of the accident by emergency responders on Saturday, June 23, according to Kris Barbrich, an investigator with the Santa Clara County coroner's office.
A public memorial service was scheduled for Alonso at a local mortuary on Thursday, June 28.
California Highway Patrol investigators are still attempting to determine whether Alonso was the victim of a hit-and-run accident.
Shortly before 6:23 p.m. on Saturday, according to a CHP official, Alonso, who was driving north in the middle lane of Highway 85 near the Evelyn Avenue exit, lost control of her white Audi, swerved across the right hand lane of the freeway and ran into a tree located on an embankment between the road and a nearby off-ramp.
The driver's side door of the Audi hit the tree, according to CHP spokesman Arturo Montiel. A number of witnesses reported the accident, saying that a white Toyota Camry "changed lanes in close proximity" to the victim's car. Following the Camry's lane change, which some witnesses described as "reckless," the Audi went off the road.
"At this point, we're not sure whether the vehicles came into contact," Montiel said. However, a witness to the accident did write down the Camry's license plate number, the CHP tracked down the driver and his car, and investigators are working to determine if the owner of the car — a San Francisco man in his mid-50s — should be charged with hit and run.
None of the CHP's witnesses have said that the Camry definitely hit the Audi, Montiel said. Anyone else who witnessed the crash is asked to call CHP Officer La Pointe at (650) 369-6261, extension 370.