What is the function of a Distant Signal?

Answer: B — To govern the approach to an interlocking signal

The function of a Distant Signal is to govern the approach to an interlocking signal. This means that it provides advance information to the train operator regarding the status of the upcoming interlocking signal, which controls train movement at junctions or crossings. A Distant Signal typically indicates whether the interlocking signal ahead is clear or if the train should expect to stop or slow down. This allows the operator to prepare and adjust the train’s speed accordingly, promoting safety and efficiency in train operations as they approach potentially complex areas of track where critical signal information is necessary.