In Release mode, when can you expect to receive CBTC 'Proceed' signal aspects?

In Release mode, the expectation is that the Continuous Block Train Control (CBTC) system does not provide 'Proceed' signal aspects. This is primarily because Release mode is a state in which the system operates under reduced functionality or safety constraints, often used during specific operational scenarios such as transitioning between operational modes or during system testing.

In typical operational modes, CBTC actively manages the train's movement and can provide 'Proceed' aspects as part of its safety and efficiency functions. However, in Release mode, that capability is intentionally turned off or restricted to ensure that safety protocols are maintained, as the system is not fully operational. This reflects the operational philosophy that higher safety standards are prioritized over signal provision in this mode.

The other choices suggest scenarios where 'Proceed' signals might be expected, but each assumes a functioning signaling system, which contradicts the nature of Release mode. Therefore, understanding that 'Proceed' signals are not generated in Release mode aligns clearly with the intended operation and the safety considerations inherent in CBTC systems.