Interstate 684

Interstate 684
Interstate 684
	I-684 highlighted in red, and extensions maintained as reference routes in blue
Route information
	Auxiliary route of I-84 in New York
	Maintained by NYSDOT
Length	28.53 mi (45.91 km)
Existed	January 1, 1970–present
History	First segment opened in October 1968, completed in December 1974
NHS	Entire route
Major junctions
South end	I-287 / NY 984J in Harrison
	NY 22 in Armonk; NY 35 / NY 117 / Saw Mill River Parkway in Katonah;
North end	I-84 / US 6 / US 202 / NY 22 in Southeast
Location
Country	United States
States	New York, Connecticut
Counties	NY: Westchester, Putnam; CT: Fairfield
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future;

Interstate 684 (I-684) is a 28.53-mile (45.91 km) auxiliary Interstate Highway in the state of New York in the United States. There is also a short portion in Connecticut with no junctions. The highway connects I-84 in Southeast with I-287 in Harrison, primarily serving commuter traffic to and from the northern suburbs of the New York metropolitan area. Most of the route is in northern Westchester County. The route of the highway was originally designated as part of I-87 from 1968 to 1970. The first section of the roadway opened to traffic in October 1968, and the final segment was completed in December 1974.

^ Starks, Edward (January 27, 2022). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved August 15, 2022.
^ Cite error: The named reference 1970log was invoked but never defined (see the help page).

[1] Starks, Edward (January 27, 2022). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved August 15, 2022.

[1970log-2] Cite error: The named reference 1970log was invoked but never defined (see the help page).

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