According to witnesses, the driver of the silver Chevy Malibu appeared to be racing against a black vehicle when he lost control of the car, hit the sound wall, and crashed on the University Avenue onramp at around 2:15 a.m., CHP Officer Art Montiel said.
The driver died at the scene and the passenger was transported to a hospital suffering from serious injuries, including possible head trauma, Montiel said.
Both men were described as Hispanic men in their early 20s.
The University Avenue onramp was closed to traffic as of 4 a.m.
Anyone with information regarding the other vehicle involved is urged to call (888) TELL-CHP.