One who directs traffic past a construction site using signs or flags.(noun)
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Use "flagger" in a sentence
"Here, the flagger was a lean, weathered, smiling old man, who seemed to really be enjoying the cooler days this week."
"Just typing the word "flagger" causes my word processor to upchuck, and mark (flag, if you will) the word as a misspelling."
"Olmstead told police that Phillips had at various times ordered a construction flagger to put out his cigarette because of "danger from gas lines" and had told a bulldozer operator to wear a hard hat because his cab wasn't enclosed."