CSX Transportation is a major railroad company operating in the eastern United States. It has over 30,000 employees, 21,000 route miles of track serving 70 ports, and transports a variety of freight including building materials, household goods, automobiles, coal, and agricultural products. CSX reinvests 18% of its revenue annually into improving and expanding its rail network. The National Gateway project involves clearance improvements and new terminal facilities along rail corridors in 6 states and DC to increase freight capacity and efficiency.