U.S. Route 9A

U.S. Route 9A
State	NY/NJ
Type	US
Route	9A
Length mi	approx. 27
Established	1934
Direction a	South
Terminus a	Fort Lee
Direction b	North
Terminus b	Albany
Counties	Bergen County; Hudson County; New York County; Bronx County; Westchester County; Albany County

U.S. Route 9A

U.S. Route 9A is a signed alternate of U.S. Route 9 serving portions of New Jersey and New York, providing urban and waterfront alignments through Manhattan, The Bronx, and suburbs along the Hudson River. The route connects major crossings such as the George Washington Bridge and interchanges with interstate corridors including I-95, I-87, and I-278, while linking landmark districts like Battery Park, Yonkers, and downtown Albany. It functions as an arterial for commuter, commercial, and regional traffic and intersects ferry terminals, rail hubs, and port facilities.

Route description

The southern segment begins near Fort Lee at approaches to the George Washington Bridge and traces local streets paralleling I-95, passing through Bergen County and Hudson County communities before entering Manhattan via the bridge. In Manhattan the route follows the Henry Hudson Parkway, adjacent to the Hudson River Park, skirting cultural institutions such as the Lincoln Center for the Performing Arts, the American Museum of Natural History, and the Intrepid Sea‑Air‑Space Museum while providing access to Columbia University, New York University, and the Metropolitan Museum of Art via cross streets. Connections to FDR Drive, West Side Highway, and crossings to Staten Island Ferry and Roosevelt Island Tramway occur within its urban corridor.

Crossing into The Bronx the alignment uses arterials that serve communities near Yankee Stadium, Van Cortlandt Park, and interchanges with I-87 and I-95 at complex junctions that integrate with regional freight routes to the Port of New York and New Jersey. Proceeding northward the route becomes Saw Mill River Parkway-adjacent or local arterial through Yonkers, offering riverfront vistas and access to Yonkers Raceway and cultural sites like the Hudson River Museum.

In Westchester County the highway parallels the Hudson, serving suburbs including Dobbs Ferry, Tarrytown, and Ossining, intersecting with New York State Route 119, NY 9A overlaps in places and providing connections to Amtrak and Metro-North Railroad stations such as Tarrytown station and Croton–Harmon station. North of Westchester the signed 9A designation historically extended toward Albany, interfacing with state routes and the New York State Thruway, terminating near downtown hubs including the Empire State Plaza.

History

Origins of the route trace to pre‑automobile turnpikes and 19th‑century river roads serving commerce between New York City and upstate markets, with alignments later incorporated into the federal highway system created under the U.S. Numbered Highway System. The 1934 numbering and subsequent realignments responded to urban growth, wartime logistics near Brooklyn Navy Yard, and postwar suburbanization that increased demands for commuter corridors to Greenwich Village, Harlem, and northern suburbs. Major 20th‑century projects including construction of the Henry Hudson Parkway and expansions near the George Washington Bridge reshaped the route through large federal and municipal initiatives overseen by entities such as the New York State Department of Transportation and the New Jersey Department of Transportation.

Late 20th‑century changes reflected interchange reconfigurations tied to projects like the reconstruction of the Cross Bronx Expressway and the modernization of the Saw Mill River Parkway approaches, with environmental reviews addressing impacts on the Hudson River waterfront, Palisades Interstate Park, and historic districts such as Sleepy Hollow. The 21st century brought urban renewal and multimodal planning around nodes including Yonkers Station and Harlem–125th Street, with freight, transit, and bicycle network integrations driven by agencies including the Metropolitan Transportation Authority and local municipal governments.

Major intersections

Key interchanges include the George Washington Bridge approaches connecting to I-95 and I-278 near Fort Lee; junctions with FDR Drive and crossings to Battery Park and West Side Highway in Manhattan; complex links with I-87 and I-95 in The Bronx near Yankee Stadium; connections to Saw Mill River Parkway and New York State Route 119 in Westchester County; and termini and interfaces with the New York State Thruway and local arteries approaching Albany and the Empire State Plaza. These intersections tie the route to regional rail at Penn Station, Grand Central Terminal, and multiple Metro-North Railroad stations.

Related routes

Alternate and spur routings have included historical overlaps and designations with U.S. Route 9, state routes such as NY 9A segments, and connector roads feeding to I-95 and the New York State Thruway. Local business routes, unsigned truck routes, and municipal arterial names—like Broadway, Riverdale Avenue and Albany Street—function as related corridors. Coordination with ferry services including NY Waterway and commuter rail operators such as MTA Capital Construction projects influence routing and signage.

Future developments and maintenance

Planned improvements emphasize resiliency against coastal and riverine flooding near the Hudson River, upgrades to interchange safety at nodes like Cross Bronx Expressway, and multimodal enhancements around stations served by Amtrak and Metro-North Railroad. Initiatives by the New York State Department of Transportation, Port Authority of New York and New Jersey, and municipal planning departments include pavement rehabilitation, bridge replacement projects over tributaries of the Hudson River, and streetscape work in Yonkers and Tarrytown tied to transit‑oriented development. Ongoing environmental reviews reference protections for the Palisades Interstate Park Commission lands, historic preservation in Sleepy Hollow, and federal funding programs administered in coordination with United States Department of Transportation grant mechanisms.

Category:U.S. Highways in New York Category:U.S. Highways in New Jersey