The Albany and Susquehanna Railroad (A&S) was a 6 ft (1,829 mm) broad gauge railroad from Albany to Binghamton, New York, operating 1851 to 1870. It was subsequently leased by the Delaware and Hudson Canal Company and later merged into the Delaware and Hudson Railroad.

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The Hartford and New Haven Railroad (H&NH), chartered in 1833, was the first railroad built in the state of Connecticut and an important direct predecessor of the New York, New Haven and Hartford Railroad (the New Haven).

The Philadelphia, Germantown and Norristown Railroad (PG&N) was a railway company in the United States. It was incorporated in 1831 and opened its first line in 1832, making it one of the oldest railroads in North America.

The Connecticut Western Railroad was chartered June 25, 1868 to run from Hartford, Connecticut, west to the New York state line, where it would meet the Dutchess & Columbia Railroad just east of Millerton, New York.