What is a key signal used by referees to indicate a travel violation?

The key signal used by referees to indicate a travel violation is to pivot their arms in a circular motion. This specific signal is a clear and recognizable way for officials to communicate that a player has violated the traveling rule, which occurs when a player holding the ball moves in a way that exceeds the allowable steps without dribbling. The circular motion of the arms helps to convey the concept of the player not maintaining proper control of their steps while in possession of the ball.

This sign is standardized so that everyone involved in the game—players, coaches, and spectators—can easily understand that a travel violation has occurred, ensuring the game is officiated consistently and transparently. The effectiveness of this signal lies in its clarity and distinctive nature, making it memorable for those familiar with the game.