What is the primary purpose of a Stop Signal?

The primary purpose of a Stop Signal is to indicate that the train must halt and await further instructions. This function is crucial for maintaining safety on the railway. A Stop Signal serves as a clear instruction for train operators that they must come to a complete stop, preventing potential collisions or incidents on the tracks. It is an essential aspect of railway signaling systems, ensuring that trains only proceed when it is safe to do so.

In the context of train operations, this signal helps to manage the flow of train traffic, allowing for critical decisions to be made regarding track occupancy, signaling changes, and maintenance activities. By requiring a full stop, the system ensures operators can assess the situation and receive further information before continuing their journey.