During an ABS failure, what do CP and interlocking signals govern?

During an ABS (Automatic Block Signal) failure, CP (Control Points) and interlocking signals specifically govern movement within the interlocking or control point only. This is because the primary role of these signals is to manage and protect movements within a limited area, ensuring safe operations in locations where multiple tracks converge or where trains may be entering and leaving the main line.

When ABS is functioning normally, it provides a continuous signal system across the entire network, serving to maintain a safe distance between trains. However, in the event of a failure, the total reliance on ABS is compromised, thus limiting the authority of the signals to the local area they control. Interlocking signals, designed to prevent conflicting movements, are crucial to maintaining safety within those defined boundaries, ensuring that only one train can occupy a specific section at any given time during the failure conditions.

This focused governance is vital for maintaining safety and operational integrity until ABS can be restored or a manual alternative to control movements is established.