How many handbrakes must be applied when securing a train in Penn Station?

Applying one handbrake when securing a train in Penn Station is in accordance with established safety protocols. This procedure is designed to prevent unintentional movement of the train while it is stationary. The use of a single handbrake is sufficient when combined with other controls and practices that ensure train stability in a controlled environment like a terminal station.

Additional handbrakes are not typically required in this setting because the conditions at Penn Station—such as the level track and controlled environment—reduce the risk of the train rolling. The rule focuses on efficiency while maintaining safety standards, thereby allowing crews to secure trains effectively with the minimum necessary equipment.

While in different contexts or environments, such as on grades or in less controlled settings, more handbrakes might be necessary, Penn Station's specifics allow for the established practice of a single handbrake.