What occurs when the ATC mode switch is in the Release position at the territory boundary?

When the ATC mode switch is in the Release position at the territory boundary, it indicates that the Automatic Train Control system is no longer actively in command of the train's operation. This allows the train to proceed without interruption, meaning that it can continue along its route without having to stop for any additional signals or restrictions imposed by the ATC system.

In this scenario, the Release position is designed for situations where control can transition smoothly from one territory to another, allowing the train to maintain its speed and momentum. This might be particularly relevant in instances where different control systems or operating procedures are employed in adjacent territories.

Other options suggest actions such as stopping, needing a manual override, or shutting down the system, which would not apply when the ATC mode is in the Release position. The goal is to ensure efficient train operations while transitioning between different sections of track, making it essential for train engineers to understand the implications of the ATC mode switch settings.