Interstate 684

Interstate 684
Map of New York with I-684 highlighted in red
Route information
Length:	28.46 mi (45.80 km)
Existed:	January 1, 1970 – present
History:	Completed in 1974[citation needed]
Major junctions
South end:	I-287 at White Plains – Harrison, NY border Saw Mill Parkway in Bedford, NY I-84 in Southeast, NY
North end:	NY 22 in Southeast, NY
Highway system
Auxiliary route of the Interstate Highway System Main • Auxiliary • Business

Interstate 684 (I-684) is a 28.4 mile-long (45.7 km) north–south Interstate Highway in the states of New York and Connecticut in the United States. The highway connects I-84 with I-287 and the Hutchinson River Parkway, primarily serving commuter traffic to and from the northern suburbs of the New York metropolitan area. The route of the highway was originally designated as part of I-87 during the 1960s. The first section of the roadway opened to traffic in October 1968, and the final segment was completed in December 1974.

Route description

I-684 begins as two separate spur routes. The primary spur (the one officially designated I-684) begins at the White Plains – Harrison line at exit 9A of the Cross-Westchester Expressway (I-287) in Westchester County, New York. The other, designated as New York State Route 984J (NY 984J) but still signed I-684, begins in Harrison at exit 26A of the Hutchinson River Parkway and has one independent exit with Manhattanville Road before joining with the I-287 spur into one route. The route follows a northerly course near the New York – Connecticut border, passing the Westchester County Airport, and at one point actually crosses the northwest corner of the Connecticut panhandle. The 1.4-mile (2.3 km) section of I-684 in Greenwich, Connecticut, is maintained by the New York State Department of Transportation but owned by the Connecticut Department of Transportation. There are no exits along I-684 in Connecticut.

The 684 C/D road at the Saw Mill and NY 117

Toward the northern border of Westchester County, it meets the northern terminus of the Saw Mill River Parkway. The parkway runs along I-684 for a short distance between its interchange with I-684 and NY 35, where it ends. During this stretch, the Saw Mill Parkway serves as a collector/distributor road for I-684. Once crossing into Putnam County, I-684 interchanges with its parent I-84 in Brewster before making a final interchange at a concurrency of U.S. Route 6 (US 6), US 202, and NY 22, at which point the route terminates and becomes part of NY 22. The speed limit is 65 mph (105 km/h), except on the spur from the Hutchinson River Parkway to just north of the I-287 merge, and just south of the I-84 terminus.

History

An expressway along the NY 22 corridor between White Plains and Brewster was planned by Westchester County in 1956. In 1961, the proposed routing of I-87 north of Elmsford along the east bank of the Hudson River was relocated to use the NY 22 corridor instead via modern I-287 and I-84. After much controversy, the routing of I-87 was approved by the Bureau of Public Roads in December 1964. Construction began soon after the approval with the southernmost section between White Plains and Armonk opened in October 1968. The northernmost section between Purdys and Brewster opened in 1969.

Diagram of interchanges 5 and 6.

On January 1, 1970, I-87 was relocated to follow the New York State Thruway north of Elmsford. The old route was redesignated as I-684. Later that year, a third segment of the new highway between Armonk and Bedford Hills opened to traffic as well. The final segment, which proved to be difficult from an engineering standpoint, was completed in December 1974.

Exit list

County	Location	Mile	Exit	Destinations	Notes
Westchester	White Plains – Harrison city/village line	0.00		I-287 / Westchester Avenue – Rye, White Plains	Southbound exit and northbound entrance
	Harrison	0.00	1	Hutchinson River Parkway south – Whitestone Bridge	Southbound exit and northbound entrance; access via unsigned NY 984J
	North Castle	4.42	2	NY 120 – North Castle	Access to the Westchester County Airport via Airport Road
		7.57	3	NY 22 – Bedford, Armonk	Signed as 3N (north) and 3S (south) northbound
	Town of Bedford	12.64	4	NY 172 – Bedford, Mount Kisco
		16.75	5	Saw Mill Parkway to NY 117 – Mount Kisco	Southbound exit and northbound entrance
		17.71	6	NY 35 – Cross River, Katonah
	Lewisboro	19.90	6A	NY 22 to NY 138 – Golden's Bridge, Lewisboro	Northbound exit and southbound entrance
	North Salem	22.36	7	NY 116 to NY 22 – Purdys, Somers	Northbound exit and southbound entrance
			8	Hardscrabble Road – Croton Falls, Purdys, Goldens Bridge
Putnam	Southeast		9	I-84 – Newburgh, Danbury, CT	Signed as 9E (east) and 9W (west)
		28.46	10	US 6 / US 202 / NY 22 south – Brewster
		28.46		NY 22 north – Pawling	Northbound exit and southbound entrance
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

• New York Roads portal

External links

• Alps' Roads – Interstate 684
• New York Routes – Interstate 684
• Information about I-684 at nycroads.com

Browse numbered routes
← I-678	NY	I-687 →
← I-395	CT	I-691 →