What does the use of an arm signal by a person controlling traffic represent?

The use of an arm signal by a person controlling traffic serves as a primary means of communication for conveying directional intent. It allows the individual to indicate where vehicles should proceed, whether that is to stop, go, or turn. This form of signaling is essential for maintaining order and safety on the roads, as it provides clear visual cues that can be recognized by drivers and pedestrians alike.

Other options, while relevant to traffic guidance, do not fully encapsulate the primary purpose of arm signals. For example, while arm signals can indeed offer guidelines or instructions for public safety and interactions, their main function is to communicate the specific actions needed from drivers and users of the roadway effectively. Thus, understanding the role of arm signals as a communication tool highlights their importance in traffic management and safety.