Marion Junction is a railroad junction in western Jersey City, New Jersey. Currently, it connects CSX's River Line (via Conrail's Northern Branch) to Conrail's Passaic and Harsimus Line. The two lines merge towards the west, allowing through trains from upstate New York to continue towards the rest of the country. The track actually making the connection is known as the Marion Running Track.

History

The New Jersey Railroad (later part of the Pennsylvania Railroad) and Paterson and Hudson River Railroad (later part of the Erie Railroad) both built their lines to this point in 1834 and November 28, 1833, respectively. It took four more years for the NJRR to cut through the New Jersey Palisades; prior to that, passengers and freight transferred to horse-drawn carriages over the hill. The junction was a simple one, with both lines merging towards the east, allowing both railroads to access the east side of the Palisades and the Hudson River.

In 1861, due to congestion on the PRR cut, the Erie built a tunnel through the Palisades (through its subsidiary, the Long Dock Company ). Marion Junction was now a minor transfer point. The 1873 building of the New York, Susquehanna and Western Railroad turned it once again into a major transfer point, as the NYS&W's connection to the PRR and east to the Hudson River.

Around 1994[1], New Jersey Transit paid to modify the junction to point west, as part of moving the River Line to the west side of the Palisades, clearing the east side for the Hudson-Bergen Light Rail.