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Question:

Flag persons (flaggers) are often located on highways and in work zones

A to stop, slow, or guide traffic safely through construction areas.
Explaination

Flag persons (flaggers) are often provided in highway and street work zones to stop, slow, or guide traffic safely through those areas. Flaggers wear orange vests, shirts, or jackets and use red or orange flags or STOP/SLOW paddles to direct traffic through work zones.