ⓘ New York State Route 9A
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 assigned to new York 6A. NY 6 was renamed in the US 9 in 1927; however, NY 6A was not renumbered to NY 9A to renumbering in 1930 the state of the roads in new York. NY 9A was extended South into new York in 1934, and from North to Ossining in the late 1930-ies. In 1933, the Briarcliff–Peekskill Boulevard opened as NY 404. All NY 404 was included in an expanded new York 9A on January 1, 1949. NY 9A was extended northward to Peekskill in 1967 after the completion of the Croton highway and South of the tunnel the Brooklyn–battery in the middle of 1990-ies.