Flagger training and certification requirements
From Washington State Department of Transportation Standard Specifications for Road, Bridge, and Municipal Construction:
Flaggers shall be posted where shown on traffic control plans or where directed by the Engineer. All flaggers shall possess a current flagging card issued by the State of Washington, Oregon, Montana, or Idaho. The flagging card shall be immediately available and shown to the Contracting Agency upon request.”
For information about Flagger Certification Training, check out the website below.