Before starting out of a terminal, what must the train operator receive from the conductor?

The correct answer is that the train operator must receive a buzzer signal from the conductor before starting out of a terminal. This signal typically serves as a standardized form of communication that indicates the conductor has completed their checks and that it is safe for the train to depart. The buzzer signal is a crucial part of the safety protocols in train operations because it ensures that the entire crew is aligned and aware of the operational status before the train moves.

In train operations, effective communication and established signals are essential for maintaining safety and coordination on the tracks. The buzzer acts as an audible confirmation that the conductor has given the required clearance, which is vital for preventing accidents and ensuring a smooth departure from the terminal.

Other forms of communication, such as written confirmation, visual approval, and radio communication, may also play roles in different contexts but do not specifically serve the purpose of signaling the departure readiness at this particular stage of operation. These methods are usually supplementary to the immediate and clear defense provided by the buzzer signal, which has become a standard safety practice in many rail systems.