New York State Route 9A - Route Description

Route Description

Further information: West Side Highway and Henry Hudson Parkway

Route 9A begins in lower Manhattan at the north end of the Brooklyn–Battery Tunnel (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, Route 9A proceeds to leave the parkway at exit 23, joining US 9 on Broadway. The portions of NY 9A between 34th and 72nd Streets in Manhattan and from the Henry Hudson Parkway to the New York City line in the Bronx is maintained 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 0.65 mile (1 km), with Route 9A leaving the Croton Expressway at Croton Point Avenue 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, Route 9A ends at the Welcher Avenue interchange in southern Peekskill.

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