Authorized Facility Audit Lists
| List for Changeable Message Signs facilities | Last edited 4/20/2026 |
| List for Sign Panel facilities | Last edited 7/21/2026 |
| List for Steel Pipe Piling facilities | Last edited 7/9/2026 |
| List for Steel Standards and Poles facilities | Last edited 7/9/2026 |
| List for Structural Precast Concrete facilities | Last edited 7/31/2026 |
| List for Welded Steel for Overhead Sign Structures facilities | Last edited 7/21/2026 |