New York State Route 9A

NYS Route 9A
Maintained by NYSDOT, NYCDOT and City of Yonkers
Map of the New York City area with NY 9A highlighted in red
Length:	47.25 mi[1] (76.04 km)
Formed:	1930[2]
South end:	I-478 / FDR Drive in Manhattan
Major junctions:	NY 495 in Manhattan I-95 / US 1 / US 9 in Manhattan US 9 / Henry Hudson Parkway in The Bronx Saw Mill Parkway in Yonkers I-87 / Thruway in Ardsley I-287 in Elmsford Saw Mill Parkway in Hawthorne US 9 in Ossining
North end:	US 9 in Peekskill
Counties:	New York, Bronx, Westchester
Numbered highways in New York < US 9 NY 9C > Spur of US 9 Interstate – U.S. – N.Y. (former) – Reference

New York State Route 9A (NY 9A) is a state highway in the vicinity of New York City, New York, United States. Its southern terminus is at the northern end of the Brooklyn–Battery Tunnel in New York City, where it intersects with both 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. In 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 New York State Route 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 by 1941.

In 1933, the Briarcliff–Peekskill Parkway opened as New York State Route 404. All of NY 404 was incorporated into an extended NY 9A by 1951. NY 9A was extended again on both ends in the 1960s to its current termini.

Route description

Signage for NY 9A in Manhattan.

Route 9A begins in lower Manhattan at the north end of the Brooklyn-Battery Tunnel (Interstate 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 Henry Hudson Bridge, Route 9A proceeds to leave the parkway at exit 23, joining US 9 on Broadway.^[3] 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.^[4][5] The concurrency between US 9 and NY 9A runs for 2.87 miles (4.62 km) within the city of Yonkers.^[1] All of NY 9A within Yonkers is maintained by the city.^[6]

NY 9A separates from US 9 along Ashburton Avenue and heads north as Saw Mill River Road.^[7] It parallels the Saw Mill River Parkway through Ardsley and Elmsford, to the west side of Hawthorne. The route junctions with the southbound New York State Thruway (I-87), then later to a full junction with I-287 (Cross Westchester Expressway) providing a route to the northbound Thruway (I-87).^[8] NY 100 merges with NY 9A to form a 3.11-mile (5.01 km) concurrency^[1] carrying the names Saw Mill River Road and Briarcliff–Peekskill Parkway, parallel to the Taconic State Parkway.^[9] 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.^[10]

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.^[11] After crossing US 9 once more in Cortlandt, Route 9A ends at the Welcher Avenue interchange in southern Peekskill.^[12]

History

Prior to the 1927 U.S. Highway System, US 9 was Route 6. An alternate route from Yonkers to Tarrytown was assigned the number Route 6A. This ran along the present alignment of Route 9A from Yonkers to north of Elmsford, where it turned west on Saw Mill Road, Neperan Road, County House Road and Bedford Road to end at Route 6 in Tarrytown.^[13]

In the 1930 renumbering of state highways in New York, Route 6A was renumbered to Route 9A.^[2] It was extended south to the Holland Tunnel in New York City in mid-December 1934, along with the marking of other numbered routes in New York City.^[14] The 1933 plan, compiled by the New York Automobile Club, had taken US 9 to the tunnel^[15] (in 1932 it would have continued south via the Staten Island Ferry^[16]), but the final plan took US 9 over the George Washington Bridge into New Jersey, with Route 9A taking over what was to be US 9.^[14]

Tarrytown, including US 9 and NY 9A, in 1938.

The 1932 plan took Route 9A south through the Bronx and into Manhattan on Broadway (US 9 would have used Riverdale Avenue north of 230th Street, resulting in a short concurrency across Spuyten Duyvil Creek). It would have split to the south on Tenth Avenue at 218th Street in order to join the Harlem River Drive via Nagle Avenue and Dyckman Street. From there it would head west on 155th Street to Amsterdam Avenue, where it would head south to 79th Street, heading west there to rejoin US 9 at Riverside Drive. It is unclear whether Route 9A would have continued south with US 9 to lower Manhattan.^[16] The 1933 plan made no changes to Route 9A, though US 9 was changed to use Broadway all the way through the Bronx.^[15]

In the final plan, however, no route was assigned to the Harlem River Drive – Amsterdam Avenue corridor. Instead, Route 9A used what had been planned as US 9, splitting at Broadway and Dyckman Street. Route 9A ran south along the west side of Manhattan on Riverside Drive and the West Side Highway (detouring around an unfinished section via 57th Street, Eleventh Avenue and 48th Street) to end at the entrance and exit plazas of the Holland Tunnel.^[14]

As the Henry Hudson Parkway replaced Riverside Drive in the 1930s, Route 9A was moved onto it, eventually using the new parkway to the crossing with US 9 (Broadway) in the Bronx, where it continued to exit and run concurrent with US 9 to the split in Yonkers.^[17][18] At the other end, an extension of Saw Mill River Road and the Briarcliff-Peekskill Parkway ran around Ossining to US 9 north of that village. Completed in 1933,^[19] it was initially designated as Route 404, and became a realignment and extension of Route 9A between 1947 and 1951.^[20][21] An extension prior to 1941 had taken it north from Tarrytown on Sleepy Hollow Road, rejoining US 9 between Tarrytown and Ossining.^[22]

A short extension on the south end happened after 1960, when Route 9A took over former Route 27A from the Holland Tunnel south to the Brooklyn-Battery Tunnel.^[23][24] To the north, the designation was extended at some point to Peekskill along the pre-Croton Expressway (opened in 1967) US 9, running concurrent with US 9 for a short distance to Croton-on-Hudson before splitting.^[25]

Major intersections

For a complete list of interchanges along the West Side Highway and the Henry Hudson Parkway, see West Side Highway and Henry Hudson Parkway.

County	Location	Mile[1]	Roads intersected	Notes
New York	Manhattan	0.00	I-478 (Brooklyn–Battery Tunnel) / FDR Drive	Northern terminus of I-478; southern terminus of FDR Drive
			I-78 (Holland Tunnel) via Canal Street	Eastern terminus of I-78
			NY 495 (Lincoln Tunnel) via 30th Street	Eastern terminus of NY 495
		5.29	Henry Hudson Parkway / 72nd Street	Southern terminus of NY 9A / Henry Hudson Parkway overlap; southern terminus of Henry Hudson Parkway
		10.21	I-95 (George Washington Bridge) / US 1 / US 9
Bronx	The Bronx	15.34	US 9 south / Henry Hudson Parkway north	Northern terminus of NY 9A / Henry Hudson Parkway overlap; southern terminus of US 9 / NY 9A overlap
Westchester	Yonkers	18.21	US 9 north	Northern terminus of US 9 / NY 9A overlap
		20.19	Saw Mill Parkway north
	Ardsley	24.17	I-87 / Thruway	Exit 7 (I-87 / Thruway)
	Greenburgh	25.58	NY 100B	Western terminus of NY 100B
	Elmsford	28.13	NY 119
		28.41	I-287	Exit 2 (I-287)
	Greenburgh – Mount Pleasant line	29.54	NY 100C	Western terminus of NY 100C
	Mount Pleasant	30.94	Saw Mill Parkway north
		32.02	NY 141	Western terminus of NY 141
		32.22	NY 100 south	Hamlet of Hawthorne; southern terminus of NY 9A / NY 100 overlap
		33.35	NY 117
	Briarcliff Manor – Mount Pleasant line	35.33	NY 100 north	Northern terminus of NY 9A / NY 100 overlap
	Village of Ossining	36.85	NY 133
	Town of Ossining	38.20	NY 134
		39.71	US 9 south	Southern terminus of US 9 / NY 9A overlap
	Croton-on-Hudson	40.36	US 9 north	Northern terminus of US 9 / NY 9A overlap
	Cortlandt	43.99	US 9
	Peekskill	47.25	US 9

See also

New York portal

• U.S. Route 9 Business (now Route 139), which continued Route 9A back to its parent in Jersey City, New Jersey

References

External links

Wikimedia Commons has media related to: New York State Route 9A

• Briarcliff-Peekskill Parkway @ NYCROADS.com Includes formerly proposed extension off of NYS Route 9A.
• New York Routes – New York State Route 9A
• NY 9A at Alps' Roads
• NY 9A (Greater New York Roads)
• Termini of NY State Route 9A