Which of the following describes the hand signal for stopping during daylight hours?

The hand signal for stopping during daylight hours is effectively represented by the action of crossing the arms above the head with palms facing forward. This gesture is clear and visible, ensuring that it can be seen by those in a vehicle or approaching in any direction. The crossed arms signal an unmistakable directive for stopping and is standard practice for traffic control or yard management to provide guidance in a safe and efficient manner.

Other signals, such as raising one arm vertically or waving both arms side to side, may communicate different meanings; for example, a raised vertical arm typically indicates "stop" or "halt," but it is often not as universally recognized in all circumstances as the crossed arms signal. Waving both arms side to side usually conveys a more dynamic action, like directing traffic to proceed in a particular direction, rather than simply stopping. Pointing down with one hand is less commonly associated with stopping and could create confusion about the intended action. Clarity is crucial in hand signals, especially in environments where safety is a priority, making the crossed arms gesture the most effective for stopping.