1 CSX Transportation Inc., operates the largest railroad in the eastern United States with a 22,000-mile rail network linking commercial markets in 23 states, the District of Columbia, and two Canadian provinces.  UP - Union Pacific Railroad. Union Pacific Railroad is an operating subsidiary of Union Pacific Corporation. It is the largest railroad in North America, operating in the western two-thirds of the United States.
Chief Justice John G. Roberts, Jr., is the 17th Chief Justice of the United States; he has been the incumbent since 2005. All federal court judges, including Supreme Court Jus â¦ tices, are commission for lifetime appointments. The average tenure on the bench is 25.5 years.
Since the tenure of William Howard Taft, the office of the Chief Justice has moved beyond just first among equals. 1  The Chief Justice also: 2  Serves as the head of the federal judiciary. 3  Serves as the head of the Judicial Conference of the United States, the chief administrative body of the United States federal courts.