When the bridge of a traveling crane is to be moved, you should signal by which gesture?

• A. holding the palm of your hand up with your fingers closed, pointing your thumb in the direction of motion, and jerking your hand horizontally
• B. extending your arm forward with your hand open and slightly raised, and making a pushing motion in the direction of travel
• C. extending your arm with the palm of your hand down, and moving your arm back and forth horizontally
• D. holding your forearm vertical with your forefinger pointing up and moving your hand in a small horizontal circle

Answer: (B)

In traveling crane signaling, moving the bridge is communicated with a forward reach of the arm, hand open and slightly raised, followed by a pushing motion in the direction you want the bridge to travel. This gesture is clear, visible, and unambiguous, so the operator understands to start moving in that direction. The other gestures either imply different actions (like stopping or circling for a different command) or are less intuitive and harder to read from a distance, making them less appropriate for directing motion. Using this standardized push signal helps coordinate the crane safely and efficiently.