Complex sentence: The River Line was abandoned south of the Tonnelle Avenue overpass (just south of CSX's North Bergen Terminal); the short connection between the National Docks Secondary and the River Line was also abandoned, as was the Weehawken Branch.
Split into simpler sentences: The River Line was abandoned east and south of the Tonnelle Avenue overpass at the North Bergen yard. The short connection between the National Docks Secondary and the River Line was also abandoned, as was the Weehawken Branch.