When routing TCs or unshunted trains to ABS or DCS territory, what is critical to ensure?

When routing train-controlled (TC) or unshunted trains to Absolute Block Signal (ABS) or Direct Current Signal (DCS) territory, it is crucial to ensure that all interlocking and control point (CP) appliances are properly lined and secured. This is essential for maintaining the safety and integrity of the train's operation as it transitions into new territory.

Properly lined interlocking and CP appliances guarantee that switches are set correctly for the route the train is to take, preventing derailment and collisions with other trains that may be occupying the same space. Additionally, securing these appliances ensures that they cannot be inadvertently changed while the train is en route, further enhancing safety by maintaining established routing integrity.

While having signals in the correct position, maintaining train speed, and communicating with maintenance personnel are all important aspects of railroad operations, they do not address the critical mechanical and operational safety mechanisms that interlocking and CP appliances provide in preventing accidents when entering ABS or DCS territory. Thus, the correct focus lies on ensuring that these systems are reliably set and secured.