What mode does the train engineer operate under in a situation with an Order Signal under ATC?

In a situation involving an Order Signal under the Automatic Train Control (ATC) system, the train engineer operates in MATC mode, which stands for Manual Automatic Train Control mode. This mode allows the engineer to have more control over the train while still being guided and monitored by the ATC system.

Operating in MATC mode is essential when an Order Signal, which typically requires the engineer to follow specific instructions, is present. The train engineer can manually control the speed and operation of the train while adhering to the signals and safety measures provided by the ATC. This ensures compliance with operational protocols while maintaining safety and responsiveness to track conditions and signals.

Choosing MATC mode provides the balance between manual operation and automatic safety checks, allowing for effective response in dynamic rail conditions where the engineer must actively engage with the train's control system.