The Belvidere-Delaware Railroad was a railroad running along the eastern shore of the Delaware River from Trenton, New Jersey north via Phillipsburg, New Jersey to the small village of Manunka Chunk, New Jersey. It became an important feeder line for the Lehigh Valley Railroad's join to the Central Railroad of New Jersey, which was constructed into Phillipsburg, NJ at about the same time. This connected Philadelphia and Trenton, NJ at one end of the shortline railroad to the rapidly growing lower Wyoming Valley region, and via the Morris Canal or the CNJ, a slow or fast connection to New York City ferries crossing New York Harbor from Jersey City, NJ. In 1871 the CNJ leased various railroads in Pennsylvania, most from the Lehigh Coal & Navigation Company allowing the CNJ to penetrate to the upper Wyoming Valley, over some stretches, competing directly with the Lehigh Valley Railroad and with the Lehigh Canal and the trunk road connection of the Belvidere Delaware Railroad to New York became less profitable since Philadelphia connected more easily to Northeastern Pennsylvania thereafter without needing a double-crossing of the Delaware River; a general revenue decline ensued, leading to the Pennsylvania Railroad acquiring the rights, where it served as part of the Pennsylvania Railroad (PRR) system, carrying mainly anthracite coal and iron ore from northeastern Pennsylvania to population centers along the coast.

Trenton Transit Center is the main passenger train station in Trenton, New Jersey. It is the southernmost stop in New Jersey on the Northeast Corridor. It is the terminus for NJ Transit trains to and from New York City and SEPTA Trenton Line Regional Rail trains to and from Philadelphia, Pennsylvania, and an intermediate station for Amtrak trains traveling between the two cities along the Northeast Corridor.