What aspect can a distant signal NEVER show?

A distant signal is a type of signal used in railway operations to provide information to train crews about the status of the track ahead. It is specifically designed to convey indications regarding the allowable speed and movement of trains.

The indication of "stop" is something that a distant signal cannot show because its primary function is to inform drivers about conditions that allow them to safely continue their journey. A distant signal primarily conveys either a "caution" indication (alerting the driver to prepare for a potentially reduced speed or an upcoming stop) or a "clear" indication (indicating that it is safe to proceed at normal speed).

In contrast, the "stop" indication is meant to be communicated through a more definitive signal closer to the railway situation, where immediate action may be required. Therefore, a distant signal does not provide a "stop" indication, as its role is to give advance warning and guidance rather than instruct an immediate halt.

This distinction underscores the operational design and safety protocols in railway systems, where the layering of signals ensures that train crews receive the appropriate guidance at various stages of their approach.