What do Interlocking Signals refer to?

Interlocking Signals specifically refer to the fixed signals of an interlocking system within a railway environment. These signals are crucial as they control train movements through junctions and crossings, ensuring safe operations by preventing conflicting train movements. They are connected to the track circuitry and switch mechanisms, allowing them to display clear instructions to train operators based on the status of the tracks and signals ahead.

The nature of interlocking signals is to maintain safety and efficiency in train operations, as they communicate critical information regarding track availability and route selection. Fixed signals, unlike other types such as temporary or emergency signals, provide a constant and reliable means of communication regarding track conditions.