The victim has been identified as 36-year-old Juan Luis Guevara of Fresno.
The crash happened after 10 p.m.. last night on Ashlan Avenue, east of Academy.
California Highway Patrol officers say the driver may have been speeding when he ran into a concrete rail.
Guevara was thrown from the vehicle despite wearing a seat belt.
He was taken to a hospital, where he later died. The impact of the crash split the car in half.
Officers are investigating if drugs or alcohol played a role in the crash.