<P> In August 2016, the Department of Transportation approved the largest loan in the department's history, $2.45 billion to upgrade the passenger train service in the Northeast region . The $2.45 billion will be used to purchase 28 new train sets for the high - speed Acela train between Washington through Philadelphia, New York and into Boston . The money will also be used build new stations and platforms . The money will also be used to rehabilitate railroad tracks and upgrade four stations, including Washington's Union Station and Baltimore's Penn Station . </P> <P> Every piece of railroad rolling stock operating in North American interchange service is required to carry a standardized set of reporting marks . The marks are made up of a two - to four - letter code identifying the owner of the equipment accompanied by an identification number and statistics on the equipment's capacity and tare (unloaded) weight . Marks whose codes end in X (such as TTGX) are used on equipment owned by entities that are not common carrier railroads themselves . Marks whose codes end in U are used on containers that are carried in intermodal transport, and marks whose codes end in Z are used on trailers that are carried in intermodal transport, per ISO standard 6346). Most freight cars carry automatic equipment identification RFID transponders . </P> <P> Typically, railroads operating in the United States reserve one - to four - digit identification numbers for powered equipment such as diesel locomotives and six - digit identification numbers for unpowered equipment . There is no hard and fast rule for how equipment is numbered; each railroad maintains its own numbering policy for its equipment . </P> <Ul> <Li> Amtrak </Li> <Li> BNSF Railway </Li> <Li> Canadian National Railway </Li> <Li> Canadian Pacific Railway </Li> <Li> CSX Transportation </Li> <Li> Kansas City Southern Railway </Li> <Li> Norfolk Southern Railway </Li> <Li> Union Pacific Railroad </Li> </Ul>

Passenger rail service in the united states is provided through