What action should be taken when laying up a train?

When laying up a train, the application of hand brakes and parking brakes is essential for ensuring the train does not move unintentionally once it has come to a stop. Hand brakes are used to secure each car of the train, while parking brakes serve as an additional safeguard, particularly for long-term layups or when the train will not be monitored continuously. This procedure is crucial as it prevents any accidental rolling or movement of the train due to gradients or other external factors.

While notifying passengers of the stop, checking for safety issues, and removing personnel from the train are important procedures in different contexts, they do not directly address the primary concern of immobilizing the train. These actions may be conducted as part of standard operational protocols, but securing the train with brakes is the fundamental step in the laying up process.