How does a school crossing patrol effectively communicate that it is not safe to cross?

A school crossing patrol effectively communicates that it is not safe to cross by using distinctive arm movements. This method of communication is crucial for ensuring that both pedestrians and drivers can clearly understand the message being conveyed. The distinctive arm movements are designed to capture attention and provide a visual cue that indicates pedestrians should wait until it is safe to cross.

Using arm movements is particularly effective because it can be seen from a distance, allowing pedestrians and drivers to react appropriately. Distinctive movements can signify various messages, such as stopping or signaling to wait, which is essential in busy traffic situations.

Making eye contact with pedestrians, while helpful, can sometimes be misleading, as not all individuals may notice or understand the message intended. Standing on one leg does not provide any clear indication regarding safety and would likely confuse both pedestrians and drivers. Waving at vehicles could be interpreted in multiple ways and wouldn't accurately communicate the critical message of safety at a crosswalk. Thus, the use of distinctive arm movements is the most effective way to convey that it is not safe to cross at that moment.