List of reference routes in New York in the context of "FDR Drive"

An unsigned highway is a highway that has been assigned a route number, but does not bear road markings that would conventionally be used to identify the route with that number. Highways are left unsigned for a variety of reasons, and examples are found throughout the world. Depending on the policy of the agency that maintains the highway, and the reason for not signing the route, the route may instead be signed a different designation from its actual number, with small inventory markers for internal use, or with nothing at all.

Franklin D. Roosevelt East River Drive, commonly known as the FDR Drive, is a controlled-access parkway on the east side of the New York City borough of Manhattan. It starts near South and Broad Streets, just north of the Battery Park Underpass, and runs north along the East River to the 125th Street / Robert F. Kennedy Bridge interchange, where it becomes Harlem River Drive. All of FDR Drive is designated New York State Route 907L (NY 907L), an unsigned reference route.

FDR Drive features a mix of below-grade, at-grade, and elevated sections, as well as three partially covered tunnels. The parkway is mostly three lanes in each direction, except for several small sections.

Harlem River Drive is a 4.20-mile (6.76 km) controlled-access parkway in the New York City borough of Manhattan. It runs along the west bank of the Harlem River from the Triborough Bridge in East Harlem to 10th Avenue in Inwood, where the parkway ends and the road continues northwest as Dyckman Street. South of the Triborough Bridge, the parkway continues toward lower Manhattan as FDR Drive. All of Harlem River Drive is designated New York State Route 907P (NY 907P), an unsigned reference route.

The parkway north of 165th Street was originally part of the Harlem River Speedway, a horse carriage roadway opened in 1898. The rest of the parkway from 125th to 165th Street opened to traffic in stages from 1951 to 1962. The parkway's ceremonial designation, 369th Harlem Hellfighters Drive, is in honor of the 369th Infantry Regiment, also known as the Harlem Hellfighters.

New York State Route 878 (NY 878) is an expressway on Long Island in New York state. The route exists in two sections, which both form the Nassau Expressway. NY 878's western terminus is the Belt Parkway and Conduit Avenue (NY 27) in Ozone Park, within southern Queens in New York City. Its southern terminus is at the Atlantic Beach Bridge in Lawrence, within southwestern Nassau County. NY 878 is discontinuous between Farmers Boulevard in Queens and the town of Inwood in Nassau County. The two sections are connected to each other by Rockaway Boulevard and Rockaway Turnpike.

NY 878 is maintained in part by the New York City Department of Transportation (NYCDOT); the New York State Department of Transportation (NYSDOT); and the government of Nassau County. The NYSDOT also maintains part of Rockaway Boulevard, which is designated as the reference route NY 909G. The 0.70 miles (1.13 km) of NY 878 between I-678 and the JFK Expressway is officially designated Interstate 878 (I-878), but not signed as such. This segment is instead signed as NY 878. The NYSDOT designated the eastbound lanes of the freeway as I-878 in January 1970, but the entire Nassau Expressway was publicly re-designated as NY 878 by 1991. The unsigned Interstate 878 is the shortest Interstate Highway in the United States.