This is an image of the bridge that was constructed by the contract that is being audited.

Stanislaus County, Project Compliance Audit

Issued: 3/14/2025

We audited the costs that Stanislaus County incurred related to four projects totaling $65,579,833, which were reimbursed by the California Department of Transportation. We also audited the project deliverables and benefits.

Stanislaus County, Project Compliance Audit
This is an overhead image of a busy highway intersection.

2023-24 Annual Summary of Findings and Recommendations

This is an image of the I-5 highway that is part of the audit.

California Department of Transportation, District 7, Interstate 5 North High Occupancy Vehicle Corridor, Project Audit

Issued: 11/8/2024

We audited the costs that the California Department of Transportation, District 7 incurred related to the Interstate 5 North High Occupancy Vehicle Corridor project totaling $916,110,612

District 7, Interstate 5 North High Occupancy Vehicle Corridor, Project Audit
This is the image from the cover of the audit report. It is a rendering of what the project looks like when finished.

Los Angeles County Metropolitan Transportation Authority

Issued: 1/15/2025

We audited the Los Angeles County Metropolitan Transportation Authority’s costs related to one project totaling $14,808,000, which was reimbursed by the California Department of Transportation. We audited project deliverables for two projects.

Los Angeles County Metropolitan Transportation Authority
This is an image of the destruction cause by fire related to the Airspace Program Audit.

Airspace Program (Part I): Audit of the California Department of Transportation’s Oversight of an Airspace That Caught Fire Underneath Interstate 10 in Los Angeles on November 11, 2023

Issued: 5/30/2024

Pursuant to Government Code, section 14461, and at the request of the director of Caltrans, the Independent Office of Audits and Investigations completed its audit of the California Department of Transportation’s (Caltrans’) administration of the airspace property, located at and around 14th and Lawrence streets, in Los Angeles, California. This report represents the first report, in a series of reports, that we anticipate releasing related to Caltrans’ administration of the airspace program. 

Airspace Program (Part I)