Under certain conditions, when is a buzzer signal NOT required for starting a train?

A buzzer signal is generally required when starting a train to ensure safety and alert those who may be in the immediate vicinity. However, there are specific scenarios where this requirement can be waived.

When departing from a regular station stop, it is understood that the environment around the train is controlled and that passengers and staff are aware of the train's operations. This often includes adherence to standard operational procedures, meaning that all necessary precautions have already been taken during the stop, and a buzzer signal may not add significant value to safety in this context.

In contrast, other conditions such as approaching a stop, operating on curved tracks, or in emergency situations typically necessitate a buzzer signal to alert others to the train's movement, enhancing overall safety. These scenarios involve heightened awareness and the need to communicate the train's status effectively to prevent accidents or ensure that all personnel are prepared for any immediate actions required.