A chartered school bus transporting 52 passengers on an elevated offramp left the roadway, landing on its roof.

[1] It remains the deadliest highway disaster ever investigated by the National Transportation Safety Board (NTSB) since its creation.

[3][2] The accident occurred at 10:55 a.m., as the driver, Evan Prothero, 49, of Olivehurst, took the Marina Vista Avenue off-ramp (exit 56) from I-680 southbound from the Benicia–Martinez Bridge.

Daniel I. Wright, 15, died on May 24, 1976, at the Highland Hospital in Oakland, California due to the injuries he sustained in the crash.

Bearing the names of those who died, it was constructed by firefighters who had responded to the accident and their friends and largely funded by them and donations they obtained.