DOT OIG Reports

Audit of FHWA Oversight of Puerto Rico Highway Funds

The DOT OIG has initiated an audit to assess the Federal Highway Administration's (FHWA) oversight of Puerto Rico's use of approximately $901 million in Federal highway formula funds provided under the Infrastructure Investment and Jobs Act. This audit follows repeated issues identified in single audit reports concerning the management of these funds by the Puerto Rico Highway and Transportation Authority.

Audit Report Summary of DOT Program Findings

The DOT OIG issued a summary report detailing 16 significant noncompliance findings from single audits impacting DOT programs for the period ending December 31, 2025. The report identified $5,475,471 in questioned costs, primarily related to the Navajo Nation, and highlighted repeat findings causing qualified opinions for three grantees.

Audit Initiated of FAA's Pilot Mental Health Program Oversight

The DOT Office of Inspector General has initiated an audit of the FAA's oversight of the Human Intervention Motivation Study (HIMS) program, a pilot substance misuse treatment program. This audit was requested by a Senate committee member following an incident involving an off-duty pilot and concerns about pilot mental health.

FAA Contract Tower Monitoring and Staffing Improvements

The DOT OIG reported that the FAA has improved its monitoring and staffing at contract towers, as mandated by the FAA Reauthorization Act of 2024. However, the report found that staffing shortages persist, with contract towers remaining understaffed by approximately 18 percent.

Audit of FTA's ADA Compliance Oversight

The DOT Office of Inspector General has initiated an audit to assess the Federal Transit Administration's (FTA) oversight of public transit providers' compliance with Americans with Disabilities Act (ADA) requirements. This audit is prompted by recent class action lawsuits against major transit systems and a lack of recent comprehensive evaluation of FTA's effectiveness in this area.