Hudson Subdivision

The Hudson Subdivision is a railroad line owned by CSX Transportation and leased by Amtrak in the U.S. state of New York. The line runs from Hyde Park north along the east shore of the Hudson River to Rensselaer and northwest to Scotia via Albany and Schenectady along a former New York Central Railroad line. From its south end, CSX has trackage rights south to New York City along the Metro-North Railroad's Hudson Line. The Hudson Subdivision junctions the Schodack Subdivision in Stuyvesant, Amtrak's Post Road Branch in Rensselaer, and the Carman Subdivision in Schenectady. Its northwest end is at a merge with the Selkirk Subdivision.

Amtrak's Empire Service, Lake Shore Limited, and Maple Leaf operate over the entire Hudson Subdivision; the Adirondack and Ethan Allen Express use the line southeast of the Delaware and Hudson Railway junction in Schenectady. The trackage west of that junction is owned by Amtrak and used by CSX via trackage rights.