What does NSS stand for in railroad terminology?

In railroad terminology, NSS stands for North Siding Switch. This term is used to designate a specific railway switch that allows trains to move from the main track to a siding located to the north. The accurate identification of such switches is crucial for operations, maintenance, and safety, ensuring that crews can efficiently manage train movements and access specific track sections. Understanding this term is important for personnel involved in track maintenance and train operations, as it helps them communicate clearly about track layouts and switching procedures.