The solo-vehicle collision involving a Tesla Model 3 happened around 2 a.m. near Reservoir Street, according to the California Highway Patrol.
"For unknown reasons, the driver of the Tesla lost control of the vehicle, collided with the center divider wall, traveled up a dirt embankment and was pronounced deceased at the scene," CHP said in a press release.
The 21-year-old female driver and a man in his 30s were killed in the crash, while a woman in her 20s and a baby were taken to an area hospital. Both were in stable condition, according to the CHP.
Westbound lanes of the freeway reopened by 5:30 a.m. The cause of the crash is under investigation.