The Office of Auditing and Evaluation supervises and conducts independent and objective audits and other reviews of DOT programs and activities to ensure they operate economically, efficiently, and effectively. This office is divided according to specific DOT program areas into four sub-offices: Aviation; Information Technology and Financial Management; Surface Transportation; and Acquisition and Procurement.

The Audit Process

Learn more about the OIG's process for selecting, conducting and reporting audits.

Government Auditing Standards (the 'Yellow Book’)

These standards pertain to auditors’ qualifications, quality of audit effort, and characteristics of professional and meaningful audit reports for audits conducted of government programs, activities and assistance.

Single Audits

Learn more about the OIG’s role and quality control reviews of single audits.

Filter By