Which hand signal indicates trolley travel when operating a bridge crane?

The hand signal indicating trolley travel on a bridge crane is characterized by palms up, fingers closed, and the thumb pointing in the direction of motion. This signal is designed to clearly communicate to the crane operator that the load is to move horizontally along the trolley. The open palm and closed fingers provide a visual cue that is easy for all personnel to interpret, promoting a safe operational environment. By having the thumb point towards the direction in which the trolley will move, it ensures that everyone involved is aware of the intended path, thereby reducing the risk of accidents or collisions during crane operations.