What is a conductor's indication?

A conductor's indication refers specifically to the visual signals that inform the train operator about the status of the train's doors. When all doors are closed and locked, lights illuminate to indicate that it is safe to proceed. This confirmation is crucial for ensuring passenger safety and operational efficiency, as it signals that the train is ready to depart from a station.

The lights serve as a standardized way of communicating vital information without verbal communication, which is especially important in scenarios with high noise levels or when the train operator cannot directly see the doors. Effective use of this indication helps to prevent accidents or incidents that could arise from departing with open doors, reinforcing the importance of clear and reliable signals in train operations.