From Maine Department of Transportation Flagger Certification Program:
“- Any flagger working for MaineDOT, or on an MaineDOT project, must be tested by their employer’s flagger certifier and must carry their agency’s certification card at all times.
– A flagger certifier can revoke any flagger card due to poor or substandard performance.
– Any flagger working on a non-MaineDOT project is not required to be certified, unless specifically required by the agency.”
For more information, check out the website below.