#BREAKING @CoCoSheriff Coroner has identified woman killed in tree accident this morning on I680 as 58 yr old Lyudmila Beyzer of Danville. pic.twitter.com/8Z7lzgQLta — Laura Anthony (@LauraAnthony7) June 11, 2018

#DEVELOPING The silver Mercedes involved in this morning’s fatal ax on #680 being loaded on to flatbed truck. Woman who was driving killed. pic.twitter.com/4ZVgZjkZCu — Laura Anthony (@LauraAnthony7) June 11, 2018

#BREAKING This is the tree that fell across Interstate 680 North of El Cerro in Danville. Caused an accident that killed one person #abc7now pic.twitter.com/U5K2CgtdVk — Laura Anthony (@LauraAnthony7) June 11, 2018

#DEVELOPING The tree that fell onto I680 is a pine and was clearly dead, sat just 20 yards uphill from the roadway. #abc7now pic.twitter.com/HGb4orTz8G — Laura Anthony (@LauraAnthony7) June 11, 2018

#DEVELOPING Northbound traffic on I680 backed up all the way back to Crow Canyon due to fatal accident at El Cerro @TOWNOFDANVILLE #abc7now pic.twitter.com/6vJD5wjJzV — Laura Anthony (@LauraAnthony7) June 11, 2018

#DEVELOPING @CaltransHQ crews removing dead pine tree that fell on I680 causing fatal ax. @320PIO says tree was on #CALTRANS property. pic.twitter.com/IdJacNo8wa — Laura Anthony (@LauraAnthony7) June 11, 2018

DANVILLE, Calif. (KGO) -- The accident happened in an instant and proved to be the worst of luck for the driver of a silver Mercedes.Dr. Lyudmila Beyzer, 58, was driving Northbound on Interstate 680 in Danville, just as a dead pine tree collapsed onto the road in front of her."The calls came out that there was possibly a tree down and there was one vehicle involved with the tree," said Sgt. Eric Butawan of the California Highway Patrol. "Unknown at this time if the vehicle collided with the tree or the tree landed on top of the vehicle. That part's still under investigation."The car was heavily damaged and Beyzer pronounced dead at the scene. The tree approximately 70 feet tall was clearly dead, perched just 20 yards up on the hillside above the freeway, just north of the El Pintado on ramp. It's property owned by Caltrans.With traffic backed up for miles, Caltrans crews worked to clear the tree from the roadway.At the same time, CHP investigators conducted their investigation where the car ended up, about an eighth of mile beyond the tree. It all happened during the morning rush hour."It could've been worse. It was during commute time," said Butawan. "Thankfully there was only one vehicle involved. Our condolences to the family. It's a terrible time. Hopefully we can get as much information and figure out what happened for them."Caltrans spokesman Bob Haus confirmed the tree was sitting on state property. The agency released a statement Monday afternoon saying, "Caltrans expresses its deepest condolences to the family of the victim of this incident. The safety of the traveling public is our highest priority. We are currently examining the causes of this unfortunate incident."Beyzer was a physician with John Muir Health. They released a statement Monday saying, "We are deeply saddened to hear about the sudden and tragic passing of Dr. Lyudmila Beyzer. She was a member of the John Muir Health Physician Network for 15 years and will be greatly missed. Our thoughts are with her family, friends, patients, colleagues and staff at this very difficult time."