What does 'brake release' mean?

'Brake release' refers specifically to the action that stops the application of brakes, allowing the train to move freely. When the brakes are released, the pressure in the brake system is reduced, enabling the train to accelerate or coast without the resistance imposed by the braking mechanism. This process is crucial for the safe and efficient operation of trains, as it ensures that there is a clear distinction between when brakes are engaged and when they are disengaged.

Understanding brake release is vital for train operators because it directly affects the train's ability to start moving again after coming to a stop or to regain speed during operations. Properly managing this action ensures that the train operates safely within designated speed limits and responds accurately to operational commands.

The other choices, while related to braking situations, do not accurately define the concept of 'brake release' as it is understood in the context of train operations.