How must a train engineer acknowledge a mode change on the TOD?

A train engineer must acknowledge a mode change on the Train Operations Display (TOD) by selecting the flashing mode indication on the TOD touch screen. This action is crucial as it ensures that the engineer is actively aware of and engaging with the system, confirming that the transition to a new operational mode has been recognized and accepted.

Selecting the flashing indication directly reflects an interactive verification process that safeguards against any miscommunication or oversight regarding the change in operation. This step is instrumental in maintaining a high level of operational safety and accuracy, ensuring that the train operates within the intended parameters.

Other options do not align with the operational procedures outlined for mode changes. For instance, a voice command may not provide the necessary verification needed by the system nor confirm the engineer’s acknowledgment effectively. Pressing the emergency stop button is an extreme measure intended for urgent safety situations rather than routine acknowledgment of mode changes. Lastly, waiting for automatic confirmation can lead to delays and does not require active participation from the engineer, which is critical during transitions between operational modes.