What is the purpose of a General Notice (GN)?

The purpose of a General Notice (GN) is to provide advisory notices related to operating rules. These notices are typically issued to inform train crews and other personnel about updates or important information that can affect the safe operation of trains. GNs serve as a means of communication to ensure that everyone involved in train operations is aware of the current practices, rules, or temporary conditions that may arise.

While instructions that affect train movement are essential, they are usually covered under different types of notices or directives that are more specific and direct. A General Notice does not imply a permanent change in operational protocols; that would typically require a different process, often involving formal documentation and implementation. Lastly, a schedule of train movements is not related to the advisory function of a General Notice, as it deals with planning and timing rather than operational rules and updates. This focus on advisories and rules specifically makes the answer clear and relevant.