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.
In the summer of 2005, this speculation became newsworthy due to the announcement of the retirement of Associate Justice Sandra Day O'Connor on July 1. President Bush announced federal appellate judge John Roberts as O'Connor's replacement on July 19. On September 5, two days after the death of Chief Justice William Rehnquist, Bush renominated Roberts as the 17th Chief Justice of the United States. He was confirmed by the United States Senate on September 29, 2005.