What is the most important hand signal that you and a helper should agree on?

The most important hand signal that you and a helper should agree on is the signal for 'stop.' This is crucial for safety, especially when operating large vehicles such as trucks. A stop signal is essential in preventing accidents; it provides a clear and immediate indication to the driver to halt their actions. Since large vehicles have limited visibility and long stopping distances, being able to quickly and effectively signal to stop can help avoid collisions or other dangerous situations that could occur if a driver does not receive timely communication.

While signals for 'go,' 'turn left,' and 'move forward' are important as well, the ability to stop promptly is critical in emergency situations or when working in close proximity to others. Therefore, prioritizing a stop signal ensures that both the driver and the helper are aligned on safety protocols, fostering a more secure working environment.