Question: Port Subdivision has a northern terminus at the port with facilities on both sides of what river?
Context: The Castleton Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of New York.  The line runs from Schodack northwest to Selkirk along a former New York Central Railroad line.  At its southeast end, it junctions with the Berkshire Subdivision and Schodack Subdivision.  After crossing the Hudson River on the Alfred H. Smith Memorial Bridge, it meets the River Subdivision and Port Subdivision at Selkirk and ends at Selkirk Yard, where the Selkirk Subdivision begins. LaSalle is a Buffalo Metro Rail underground station located at the corner of Main Street and LaSalle Avenue and is one stop from the northern terminus.  Original drafting plans had the station used as a turnout between the current Metro Rail line and three proposed extensions; the Tonawanda Line, which would extend service into the cities of Tonawanda and Niagara Falls; the North Buffalo Line, which would extend service to Elmwood Avenue on an abandoned railroad right-of-way between Hertel and Kenmore Avenues; and the East Buffalo line, to connect the Main Street line with the proposed Airport Line, carrying passengers to the Buffalo-Niagara International Airport.  The only visible sign of the turnout is located below ground by way of partially finished tunnel just west of the LaSalle station platforms.  From May 20, 1985 to November 10, 1986, due to construction issues at LaSalle station, Amherst Street station served as the northern terminus.  Since November 10, 1986, University station serves as the northern terminus. U.S. Route 222 Business (US 222 Bus.)  is a 12.17 mi business route of US 222 located in Reading, Pennsylvania.  The southern terminus is at US 222 in Cumru Township.  Its northern terminus is at US 222 in Ontelaunee Township.  The route begins at the US 222 freeway and heads through the southwestern suburbs of Reading as Lancaster Avenue, intersecting Pennsylvania Route 724 (PA 724) in Shillington.  US 222 Bus.  continues into Reading on Lancaster Avenue and intersects the northern termini of PA 625 and PA 10 before reaching an interchange with the US 422 freeway.  The business route crosses the Schuylkill River and becomes Bingaman Street.  US 222 Bus.  turns north on 5th Street and intersects US 422 Bus.  in downtown Reading and the southern terminus of PA 61 to the north of downtown.  The route interchanges with the PA 12 freeway and continues north through suburban Muhlenberg Township as 5th Street Highway.  US 222 Bus.  reaches Temple and continues northeast to its northern terminus as Allentown Pike.  US 222 Bus.  is the only auxiliary route of US 222 in Pennsylvania. Pennsylvania Route 75 (PA 75) is a 71.2 mi north–south state highway located in central Pennsylvania.  The southern terminus is at the Mason–Dixon line in Montgomery Township, where the road continues into Maryland as Maryland Route 494 (MD 494).  The northern terminus is at an interchange with U.S. Route 22 (US 22) and US 322 northeast of Port Royal.  PA 75 is a two-lane undivided road that passes through the Ridge-and-Valley Appalachians in Franklin and Juniata counties.  The route heads north from the Maryland border in Franklin County to Mercersburg, where it runs concurrent with PA 16 and PA 416.  From Mercersburg, PA 75 heads north and crosses US 30 in Fort Loudon before it runs northeast through a long valley, where it has an interchange with the Pennsylvania Turnpike (Interstate 76 or I-76) in Willow Hill.  The route turns north and heads into Juniata County, where it continues through another valley.  PA 75 passes through Port Royal and crosses the Juniata River before it comes to its terminus at US 22/US 322. U.S. Route 1 (US 1) in the U.S. state of Georgia, which is concurrent for almost its entire length with State Route 4 (SR 4), is a highway traversing south-to-north through portions of Charlton, Ware, Bacon, Appling, Toombs, Emanuel, Jefferson, and Richmond counties in the southeastern and east-central parts of the U.S. state of Georgia.  In Georgia, the highway originates at US 1/US 23/US 301/SR 15 at the St. Marys River and the Florida state line, where SR 4 and SR 15 reach their southern terminus.  It travels to its northern terminus at US 1/US 25/US 78/US 278/SC 121 at the Savannah River and the South Carolina state line in Augusta.  Here, SR 10 reaches its eastern terminus, and SR 121 reaches its northern terminus. The Port of Albany–Rensselaer, widely known as the Port of Albany, is a port of entry in the United States with facilities on both sides of the Hudson River in Albany and Rensselaer, New York.  Private and public port facilities have existed in both cities since the 17th century, with an increase in shipping after the Albany Basin and Erie Canal were built with public funds in 1825. The Port Said Port Authority (PSPA) is a government agency of Egypt, charged with the responsibility to govern, regulate and develop the port facilities in the vicinity of Port Said in the Mediterranean Sea, on the northern terminus of the Suez Canal.  Principal port areas of Port Said include: Pennsylvania Route 873 (PA 873) is a north-south, two-lane road mainly located in northern Lehigh County, Pennsylvania with a small section in Northampton County.  Its southern terminus is at PA 309 in Schnecksville.  Its northern terminus is at PA 248 in the Lehigh Township hamlet of Weiders Crossing.  The route runs through rural areas in northern Lehigh County, intersecting the western terminus of PA 329 in Neffs.  PA 873 passes through Slatington as Main Street before it crosses the Lehigh River into Northampton County and immediately reaches its northern terminus south of Lehigh Gap in Blue Mountain. Pennsylvania Route 324 (PA 324) is a 13.3 mi state highway located in the western part of Lancaster County, Pennsylvania.  The southern terminus is at Bridge Valley Road (SR 3038) in the community of Pequea along the Susquehanna River in Martic Township.  The northern terminus is at U.S. Route 222 (US 222)/PA 272 in Lancaster.  PA 324 heads northeast from Pequea parallel to the Pequea Creek.  The route continues north to New Danville, where it has a concurrency with PA 741.  From here, PA 324 continues parallel to the Conestoga River to its northern terminus on the southern edge of Lancaster.  The northern portion of PA 324 follows the Lancaster and New Danville Turnpike, a 19th-century turnpike.  PA 324 was designated in 1928 to run from PA 124 at Penn Grant Road north to PA 124 in New Danville, while PA 124 was designated on the remainder of the road between Lancaster and Pequea, where it crossed the Susquehanna River on a bridge towards York.  By 1930, PA 324 was paved and the PA 124 bridge over the river was removed.  PA 324 was extended to its current length in the 1930s. The Port Subdivision is a railroad line owned by CSX Transportation in the U.S. state of New York.  The line runs from Selkirk north to Albany along a former New York Central Railroad line.  At its south end, the Port Subdivision junctions with the Castleton Subdivision and River Subdivision; its north end is at the Port of Albany, served by the Albany Port Railroad.
Answer: Hudson