A flagperson, also known as a flagger or traffic control person, is an individual assigned to direct and control traffic at construction sites, roadwork zones or in areas where utility work is being done. Other synonyms for flagperson include the terms pilot, guide, marshal, watchman, sentry, lookout, spotter, and controller. A flagperson's primary duty is to ensure the safety of drivers, pedestrians, and workers by communicating with them using hand gestures, signs, or radios. They are also responsible for monitoring vehicles and ensuring that they follow the prescribed speed limit. These synonyms for flagperson are valuable to have in any field where traffic control and safety is essential.