What is the most crucial hand signal that you and your helper should agree upon?

When working with a helper, especially in situations that require close coordination, the most crucial hand signal to agree upon is the signal for "Stop." This is vital for ensuring the safety of both the driver and the helper during maneuvers such as backing up or when working around obstacles. An agreed-upon stop signal allows the helper to communicate potential hazards or safety concerns quickly and effectively, preventing accidents.

While signals for going forward, turning, and backing up are important, having a clear and unmistakable stop signal prioritizes safety above all else. If the driver understands immediately to halt their movements when signaled, it can help avert dangerous situations where either the vehicle or personnel could be at risk. Therefore, establishing this foundational signal is critical for safe operations in various driving and working conditions.