Independent Office of Audits and Investigations

Share via:

Audits and Investigations

External Audits

External Audits help management achieve its Stewardship goal and fiduciary responsibilities by ensuring external entitles who receive Department funds comply with associated State and federal requirements. Such entities include private-for-profit organizations (engineering and construction firm, etc.) as well as local government and transportation agencies who receive Department funds either through Department contracts (direct funding) or through Department agreement and grants (pass-through funding).

External Audits Section is divided into two main units: External Contracts, and External Local Government.

External Contracts is comprised of:

External Local Government is comprised of:

Internal Audits

    Internal Audits - Internal Audits is responsible for delivering audit services which assist management in accomplishing departmental priorities and in making efficient, effective, and financially responsible transportation decisions. Internal Audits provides management with feedback on the organization's success in meeting its objectives and accomplishing established priorities along with constructive recommendations to improve performance, achieve compliance with state and federal regulations as well as to follow-up on corrective action taken.

  • Types of Internal Audit
  • Internal Audit Reports Issued


    Investigations - Investigations help management achieve its goals in ensuring that administrative investigations are performed as requested by management and external sources. Feedback is provided to the directorate and external sources, as appropriate, on investigation results and corrective actions taken.

  • FAQs- Investigations
  • Whistleblower Hotline


A&I's significant contribution to Caltrans management and to the public is its independent monitoring role over public (State, local, and federal) resources. From this effort, State, local, and federal management is apprised of the operational vulnerability and risks that exist and is provided recommendations on how to implement proactive management practices to mitigate the problems. In addition, A&I's identifies millions of dollars of cost savings to the department, local governments, and the public.

Statewide Alerts and Other Information

Contact Information

Physical Address:

California Department of Transportation
Division of Audits and Investigations
1304 O Street, Suite 200
Sacramento, CA 95814

Mailing Address:

California Department of Transportation
Division of Audits and Investigations
Mail Station 2
P. O. Box 942874
Sacramento, CA 94274-0001

General Information:

Phone: (916) 323-7111

Caltrans Logo