New York State Route 878

New York State Route 878
New York State Route 878
Nassau Expressway
	Map of western Long Island with NY 878 highlighted in red
Route information
	Maintained by NYSDOT and NYCDOT
Length	5.69 mi (9.16 km)
History	Queens segment designated I-878 on January 1, 1970; Queens eastbound freeway completed by 1971; Nassau segment opened 1990; Queens segment redesignated NY 878 by 1991;
Northern segment
Length	3.73 mi (6.00 km)
West end	NY 27 in Ozone Park
Major intersections	I-678 / Belt Parkway in South Ozone Park
East end	Rockaway Boulevard in Springfield Gardens
Southern segment
Length	1.96 mi (3.15 km)
North end	Rockaway Turnpike in Inwood
South end	Atlantic Beach Bridge in Lawrence
Location
Country	United States
State	New York
Counties	Queens, Nassau
Highway system
	New York Highways; Interstate; US; State; Reference; Parkways;

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.

NY 878, the Nassau Expressway, was originally planned in 1945 as a freeway between the Belt Parkway in Queens and Long Beach in Nassau. The expressway was supposed to replace Rockaway Boulevard and Turnpike in the vicinity of what is now JFK Airport, connecting to a proposed Long Beach Expressway south of Atlantic Beach Bridge. The short freeway portion in Queens was originally built as part of Interstate 78 (I-78) in the late 1960s, but the segment of I-78 through New York City was canceled in March 1971 due to community opposition. Through the 1970s, the rest of the freeway south of 150th Street was also canceled for various reasons. A scaled-down version of the road in Nassau County, a four-lane expressway, was completed in 1990. An attempt to complete the section of the freeway in Queens was deferred due to the early 1990s economic recession.

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