What is the primary characteristic of a Relay Track?

The primary characteristic of a Relay Track is that it is used to transfer trains from one station to another. This type of track serves the purpose of facilitating the movement of trains, ensuring they can shift from one route to another or continue their journey to different destinations without being impeded by other train operations. This is especially important for maintaining efficient rail service and reducing delays, as the relay track can help manage train flows in busy rail networks.

In the context of rail operations, relay tracks often have characteristics that allow for minimal operational disruption, enabling smooth transitions as trains move between various segments of the rail system. This function is vital for optimizing schedules and operational effectiveness in a complex transportation system.

While the other choices refer to specific functions of tracks or services, they do not accurately capture the primary role of a Relay Track, which is fundamentally about the transfer and movement of trains between different points in the rail system.