NY 1, NY 4, NY 6, NY 9, NY 9W, NY 11, NY 15, NY 15A, NY 20, NY 44, NY 62, NY 104, NY 202, NY 209, and NY 219 were removed due to the creation of the U.S. highways with the same number.
Reserved routes
NY 181
NY 188
NY 229 - Reserved for NY 7 between NY 7A and the New York-Pennsylvania state line. Once reserved (circa 1967) for the Nassau Expressway (now NY 878) east of the proposed Clearview Expressway near John F. Kennedy Airport.
12"Archived copy"(PDF). Archived from the original(PDF) on June 5, 2016. Retrieved September 23, 2016.{{cite web}}: CS1 maint: archived copy as title (link)
12"Vt. and New York Agree on Uniform Set of Route Nos". The Montpelier Evening Argus. December 20, 1945. p.2. Retrieved May 6, 2021– via Newspapers.com.
12An Application From the State Highway Department of New york for the Relocation of U.S. Route 219 (Report). 1970–1971. pp.3, 13. Retrieved November 10, 2020– via AASHTO Route Numbering Archive.