What happens when transitioning into Release mode while in motion?

When transitioning into Release mode while in motion, an emergency brake application occurs as a safety precaution to prevent accidents and ensure the train comes to a controlled stop. This procedure is in place because transitioning to Release mode typically involves a significant change in the power and braking systems of the train, and if done while the train is in motion, there could be a risk of losing control of the train’s speed.

Releasing the brakes without a planned stop can lead to a dangerous situation, so the emergency brake engages automatically to ensure the safety of the train, crew, and passengers. This is a critical feature of the train's operational safety protocols.

Options suggesting the train's speed is reduced by half, that it continues at the same speed, or that only a warning signal is activated do not accurately represent the emergency measures that are put in place during such a transition. The system is designed to prioritize safety, and the engagement of emergency brakes is a reflection of that prioritization.