Metro-North Railroad/Siemens SC42-DM Runs In Daylight. On the morning of Tuesday, August 12, 2025, MTA Metro-North Railroad/Siemens SC42-DM MNCW 301 operated in daylight for the first time. The train made a non-revenue round trip from Croton Harmon to Grand Central Terminal. This class of locomotive is still in the testing phase, and at present, there are four on the property.
Though similar to the all diesel design of the SC-44 and ALC-42, these locomotives also had to go to the testing center in Pueblo, Colorado for full evaluation before delivery to Metro-North. The locomotives are much quieter than their predecessors, and also significantly more fuel efficient while providing more power. While the (present) GE P32AC-DM fleet changes from electric to diesel mode around the Harlem-125 Street Station, MNR has stated that this locomotive is designed to operate on third rail to the Croton Harmon area, where electrification ends. Other testing still needs to be completed prior to these locomotives entering revenue service.
