What does the Terminal Proceed signal instruct the train to do?

The Terminal Proceed signal instructs the train to proceed without restrictions, signaling that the train is authorized to continue its movement without needing to reduce speed or approach with caution. This signal typically indicates that the train is either entering a yard or terminal area where it has been cleared for unrestricted movement. In essence, when a train receives this signal, it can move forward confidently, knowing there are no immediate hazards or restrictions in its path.

Other options suggest varying levels of caution or restrictions, which would not apply in this case. For instance, a signal instructing a train to stop immediately or to prepare for possible halting would indicate a risk or need for caution. Similarly, a signal for slow speed would imply that there are specific conditions that require careful navigation. However, the Terminal Proceed signal guarantees a clear path, allowing the locomotive engineer to operate the train at a normal speed without immediate concerns.