What action should be taken if the TOD fails?

In the context of train operations, particularly concerning the Operation of Train Control Systems, it's essential to have a backup plan in case the primary system, such as the Train Operations Display (TOD), fails. Switching to the backup Communication-Based Train Control (CBTC) TOD screen ensures that train engineers maintain operational safety and continuity. Notifying the Trainmaster is equally important because it ensures higher management is informed of the issue, allowing them to take necessary actions or provide assistance.

This course of action allows the train to proceed with the necessary oversight and information while ensuring compliance with safety protocols and minimizing disruption to regular operations. Maintaining communication with the Trainmaster also helps in coordinating any additional measures that need to be taken, ensuring the safety of passengers and the train crew.

Other actions, such as continuing on the current signal or waiting for the signal to reset, may not address the potential safety risks associated with a failed TOD and could result in unsafe conditions. Deactivating all systems and stopping the train may not be warranted unless a more severe issue arises, as it could unnecessarily hinder operations without resolving the primary issue at hand. Thus, switching to the backup screen and notifying the Trainmaster is a proactive and responsible approach when facing a TOD failure.