What must an employee identify when reporting the passage of a train?

When reporting the passage of a train, it is essential for an employee to identify both the engine number of the train and the proper marker display. The engine number serves as a unique identifier for the train, allowing dispatchers and other personnel to confirm which train is being reported. Meanwhile, proper marker displays provide critical safety information regarding the train's status and any potential restrictions, such as whether it is a freight or passenger train, or if it is carrying hazardous materials.

By combining this information, the reporting process ensures that all necessary details are transmitted for safety and operational awareness. This comprehensive approach minimizes the risk of miscommunication and enhances the operational efficiency of the railway system. Identifying only limited information, such as just the track number, the engine number alone, or only the train operator's name, does not provide a complete picture and may lead to confusion in coordinating train movements and addressing safety concerns.