page_title: New York State Route 9A
section_title: Route description
hierarchical_section_title: New York State Route 9A / Route description
caption_attribution_description: Northbound New York State Route 9A (12th Avenue/West Side Highway) at the intersection with 52nd Street in Manhattan, New York City
context_page_description: New York State Route 9A is a state highway in the vicinity of New York City in the United States. Its southern terminus is at Battery Place near the northern end of the Brooklyn–Battery Tunnel in New York City, where it intersects with both the unsigned Interstate 478 and FDR Drive. The northern terminus of NY 9A is at U.S. Route 9 in Peekskill. It is predominantly an alternate route of US 9 between New York City and Peekskill; however, in New York City, it is a major route of its own as it runs along the West Side Highway and Henry Hudson Parkway. It is also one of only two signed New York State routes in Manhattan. In northern Westchester County, NY 9A follows the Briarcliff–Peekskill Parkway.
  The origins of NY 9A date back to the 1920s when an alternate route of then-NY 6 from Yonkers to Tarrytown was designated as NY 6A. NY 6 was redesignated as US 9 in 1927; however, NY 6A was not renumbered to NY 9A until the 1930 renumbering of state highways in New York. NY 9A was extended south into New York City in 1934 and north to Ossining in the late 1930s. In 1933, the Briarcliff–Peekskill Parkway opened as NY 404.
context_section_description: NY 9A begins in Lower Manhattan at Battery Place near the north end of the Brooklyn–Battery Tunnel (unsigned I-478) and heads north on the surface West Side Highway and Henry Hudson Parkway, crossing US 9 for the first time at the east end of the George Washington Bridge. After crossing into the Bronx via the Triborough Bridge and Tunnel Authority-owned Henry Hudson Bridge, NY 9A proceeds to leave the parkway at exit 23, joining US 9 on Broadway. The portions of NY 9A between Lower Manhattan and 72nd Street, and from 125th Street to the New York City line (with the exception of the Henry Hudson Bridge) are owned by the New York State Department of Transportation, the portion between 72nd and 125th Streets is owned by the New York City Department of Parks & Recreation and the entire highway within city limits is maintained on a daily basis by the New York City Department of Transportation. The concurrency between US 9 and NY 9A runs for 2.87 miles (4.62 km) within the city of Yonkers. All of NY 9A within Yonkers is maintained by the city.
  NY 9A separates from US 9 along Ashburton Avenue and heads north as Saw Mill River Road. It parallels the Saw Mill River Parkway through Ardsley and Elmsford, to the west side of Hawthorne. The route meets the southbound New York State Thruway (I-87) at a partial interchange and later meets I-287 (the Cross-Westchester Expressway) at a full interchange that provides a route to the northbound Thruway (I-87). NY 100 merges with NY 9A to form a 3.11-mile (5.01 km) concurrency carrying the names Saw Mill River Road and Briarcliff–Peekskill Parkway, parallel to the Taconic State Parkway. NY 9A exits off this highway along the Briarcliff–Peekskill Parkway, while NY 100 continues straight as Saw Mill River Road. NY 9A merges to form a brief concurrency with US 9 as the Croton Expressway in Ossining just south of the Croton River.
  The second concurrency between US 9 and NY 9A runs for 1.10 miles, with NY 9A leaving the Croton Expressway at NY 129 in Croton-on-Hudson. The highway heads north along Riverside Avenue and eventually joins old Albany Post Road. After crossing US 9 once more in Cortlandt, NY 9A ends at the Welcher Avenue interchange in southern Peekskill.
caption: NY 9A northbound at 52nd Street in Manhattan
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