[2] At Port Morris trains continued over the New York Connecting Railroad to Harold Interlocking in Queens, just short of Pennsylvania Station.

[3] To support the multiple electric systems and collection methods between New Haven and New York the EP-2 carried both pantographs and a contact shoe for third rail operation.

[5][6] The New Haven needed additional locomotives to handle services into New York City's Pennsylvania Station following the opening of the Hell Gate Bridge Route.

After several unsuccessful experimental General Electric locomotives, the New Haven returned to Baldwin-Westinghouse for an improved version of the pioneering EP-1.

[9] The company was phasing out electrified freight operations and considered truncating electrification from New Haven to Stamford, Connecticut, a distance of 39 miles (63 km).