What is the extent of authority when a station name designates the last named point in a track warrant?

The correct answer is that the authority includes the first siding switch or station sign if no siding exists. This means that when a track warrant specifies a station name, the authority granted to operate extends beyond just the station sign itself, encompassing the first siding switch as well. This is important for ensuring safe operations and clear communication between train crews and dispatchers regarding the limits of authority.

In practice, this means that if a train is operating on a track warrant that designates a station, and there is a siding at that station, the authority to proceed covers the area up to the first switch leading into that siding. If there is no siding present, it still extends to the station sign. This provision is designed to provide flexibility and clarity in operations, ensuring that train crews understand the extent of the operational limits to maintain safety and efficiency on the railway.

Understanding this concept is critical for train dispatchers, as they must ensure clear and precise communication concerning the limits of track authorities to prevent incidents and ensure safe train movements.