Where are the aspects of interlocking and block signals shown?

The aspects of interlocking and block signals are typically detailed in the special instructions. This is because special instructions provide specific guidelines and operational protocols that pertain to unique situations or locations within the rail system. They address nuances that might not be covered in broader documents like the operating manual, which generally outlines overall policies and procedures but may lack the level of detail required for specific signaling aspects.

Special instructions are crucial for ensuring that dispatchers and train crews understand the unique signaling configurations and operational limits at particular interlocking and block signal locations. This distinct focus on situational requirements means that the special instructions serve as a key reference for managing the operational aspects safely and effectively.