Metropolitan Transportation Authority (MTA) Assistant Conductor Practice Test

What is the primary function of a Distant Signal?

1. To stop a train before entering a block

2. To indicate the maximum speed of the train

3. To govern the approach to an interlocking signal

4. To assist in train tracking

The correct answer is: To govern the approach to an interlocking signal

The primary function of a Distant Signal is to govern the approach to an interlocking signal. Distant signals provide advance warning to train crews about the status of the upcoming signal, allowing them to prepare for the actions they will need to take once they reach the interlocking area. This helps ensure safe and smooth operations by providing critical information about whether the train can proceed or if a stop is required. During transit, these signals play a crucial role in maintaining efficient train movement, especially in areas where multiple tracks intersect or where transitions between different types of operation may occur. By indicating upcoming actions at an interlocking signal, Distant Signals contribute significantly to overall railway safety and efficiency. Other options discuss different aspects of signal functions but do not accurately define the specific role of a Distant Signal. For instance, stopping a train before entering a block relates more to Block Signals, while maximum speed indications typically fall under Speed Limit signals. Train tracking is a broader concept involving overall train monitoring, which is not the primary role of a Distant Signal.