What is the purpose of circle advisory boards?

Circle advisory boards serve the crucial function of providing advisory information for train operations, which includes important details that influence safe and efficient rail movement. This means that the information conveyed by these boards can include recommendations, operational guidelines, and situational updates relevant to train conductors and control personnel.

Understanding the significance of advisory information is essential for ensuring the safety of train operations, as it helps operators make informed decisions based on real-time conditions or changes in operational protocols. This advisory characteristic is what distinguishes circle advisory boards from other indicators, which may serve more specific or limited purposes in train management, such as signaling maintenance needs or marking different track types.