What does the Aspect Display Unit (ADU) show?

The Aspect Display Unit (ADU) is a crucial component in the cab signaling system of trains. It primarily shows the cab signal aspects, which are visual indications that inform the train operator about the status of train control and the track ahead. The aspects depicted can include signals that denote speed restrictions, stop signals, or other operational commands essential for safe train management.

Understanding the cab signal aspects is vital for a conductor as it directly influences decision-making regarding the operation of the train. This visual information helps ensure that the train operates safely and efficiently under various conditions. The ADU plays a key role in enhancing situational awareness for the operator by providing timely and accurate information about the track environment.