What does NSPZ mean in Railroads?

Norfolk Southern Railway

The Norfolk Southern Railway (reporting mark NS) is a Class I freight railroad in the United States formed in 1982 with the merger of Norfolk and Western Railway and Southern Railway. With headquarters in Atlanta, the company operates 19,420 route miles (31,250 km) in 22 eastern states, the District of Columbia, and had rights in Canada over the Albany to Montréal route of the Canadian Pacific Railway. NS is responsible for maintaining 28,400 miles (45,700 km), with the remainder being operated under trackage rights from other parties responsible for maintenance. Intermodal containers and trailers are the most common commodity type carried by NS, which have grown as coal business has declined throughout the 21st century; coal was formerly the largest source of traffic. The railway offers the largest intermodal rail network in eastern North America. NS was also the pioneer of Roadrailer service. Norfolk Southern and its chief competitor, CSX Transportation, have a duopoly on the transcontinental freight rail lines in the Eastern United States. Norfolk Southern is the namesake and leading subsidiary of the Norfolk Southern Corporation, based in Atlanta, Georgia; it was headquartered in Norfolk, Virginia, until 2021. Norfolk Southern Corporation was incorporated in Virginia on July 23, 1980 and is publicly traded on the New York Stock Exchange under the symbol NSC. The primary business function of Norfolk Southern Corporation is the rail transportation of raw materials, intermediate products, and finished goods across the Southeast, East, and Midwest United States. The corporation further facilitates transport to the remainder of the United States through interchange with other rail carriers while also serving overseas transport needs by serving several Atlantic and Gulf Coast ports. As of April 10, 2019, Norfolk Southern Corporation's total public stock value was slightly over $51.6 billion.

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