The carrier may hold vehicle inspection, maintenance, repair, driver, route, dispatch, and collision material. The current CHP School Bus Inspection Manual, Chapter 5 says a carrier must maintain a report of each collision on public or private property involving a school bus with a pupil aboard. It says the report contains pertinent details and is retained for 12 months under 13 CCR 1234(h). That stated carrier period does not promise that every requested item is releasable.
Law enforcement may hold a traffic collision report, diagram, photographs, witness information, or school-bus supplement. The CHP 555E School Bus Crash Supplemental Report instructions show fields for driver certification, vehicle inspection approval, passenger count, and seating positions. A qualifying supplement answers different questions from a maintenance file or route record.
A district, county office, charter school, private school, or contractor may hold route assignments, stop approvals, transportation policies, parent communications, training documents, incident correspondence, or site plans. Ownership and access vary. Confirm the actual operator and contracting arrangement before sending a request; a yellow bus at a school does not identify the legal custodian.
A city, county, Caltrans, property owner, or school facilities office may hold curb, traffic-control, driveway, crosswalk, lighting, construction, or site-design material. Ask for the record family tied to a defined location and period. If an office is not the custodian, ask whether it can identify the responsible office.
Keep a five-column index: item requested, likely custodian, date sent, response or limitation, and storage location. Preserve portal receipts, cover letters, redactions, and denials with produced files. “Not located,” “withheld,” “not recorded,” and “not yet requested” are different statuses.