| What certification are you seeking? | Submit letters verifying work zone experience | Submit a valid Flagger certification from WA, OR, ID, or MT | Submit a valid TCS or TCT certification from the same state |
| Oregon TCS certification | ✔ | ||
| Idaho or Washington TCS certification | ✔ | ✔ | |
| Oregon or Washington TCT certification | ✔ | ||
| Idaho, Washington, or Oregon TCS or TCT recertification | ✔ | ✔ |
Looking for the verification letter requirements? Find them here.