Interstate 684 New York / Connecticut

Interstate 684 New York
North End
South End


Interstate 684 is a suburban freeway stretching 28 miles north from I-287 at White Plains to I-84 and NY 22 in the town of Southeast. The south end of the route partitions with separate branches to the Cross Westchester Expressway (I-287) and Hutchinson River Parkway. The New York State Department of Transportation (NYSDOT) inventories the connection with I-287 as Route I684 and the link with Hutchinson River Parkway as Route 984J.

I-684 parallels NY 120 north from Harrison between Rye Lake and Westchester County Airport (HPN) into the western panhandle of Connecticut. While there are no ingress or eggress points through the Constitution State, ConnDOT maintains part of the roadway.1

Northward into Armonk, New York, I-684 and NY 22 cross paths at the first of three meetings. NY 22 shifts east from the freeway through the town of North Castle while Interstate 684 parallels the Byram River north to Byram Lake Reservoir. Traversing hilly terrain north through the town of Bedford, I-684 converges with the north end of Saw Mill River Parkway at the community of Katonah.

Entering the town of Lewisboro, I-684 and NY 22 run along side each other east of Muscoot Reservoir to Goldens Bridge. The two again parallel each other directly east of the Croton River at Purdys Station in North Salem. NY 22 combines with U.S. 202 west of I-684 as both highways turn northeast across the Putnam County line to Interstate 84 at Brewster.


The corridor for I-684 was originally apart of Interstate 87 extending north from the Cross Westchester Expressway to I-84 at Brewster. This alignment included a concurrency along Interstate 84 west across the Newburgh-Beacon Bridge over the Hudson River to the New York Thruway at the town of Newburgh. The 1968 Highway Act redefined I-87 along the New York Thruway mainline from the Tappen Zee Bridge north to Interstate 84. Interstate 684 was established in 1969 with Federal Highway Administration (FHWA) approval on September 11 and American Association of State Highway and Transportation Officials (AASHTO) approval on October 26.

Route Information

  • North End – Brewster, NY

  • South End – Purchase, NY

  • Total Mileage – 28.47


New York – 27.06

  • Cities – White Plains

  • JunctionsI-287 I-84

Connecticut – 1.41

  • Cities – none

  • Junctions – none

Source: December 31, 2018 Interstate Route Log and Finders List

I-684 Annual Average Daily Traffic (AADT)

Source: 2016 NYSDOT Traffic Data Viewer, NYSDOT 2002 Traffic Volume Report
State of Connecticut Department of Transportation 2015 Traffic Volumes State Maintained Highway Network (Traffic Log)

North End I-84 U.S. 6 US 202 New York 22 – Brewster, New York

Perspective from Interstate 684 north
Interstate 684 winds northeast across a valley between Turk Hill and Starr Ridge on the two mile approach to Exit 9 with I-84. Photo taken 06/13/05.
Turk Hill Road spans I-684 beyond milepost 27, one mile south of the directional cloverleaf interchange (Exit 9) with Interstate 84. Photo taken 06/13/05.
Sign bridges for Exit 9 and U.S. 6/202 and NY 22 south (Exit 10) were replaced during a resurfacing project along Interstate 684 north to I-84 in Summer/Fall 2018. Photo taken 06/13/05.
A lane drop occurs at Exit 9E for Interstate 84 east for Danbury, Waterbury and Hartford, Connecticut. Photo taken 06/13/05.
Exit 9E leaves I-684 northbound for I-84 east into Connecticut. The button copy sign for Danbury was replaced by 2016. Photo taken 06/13/05.
Exit 9W loops onto I-84 west to Newburgh and Scranton, Pennsylvania. The ensuing ramp links I-684 with U.S. 6-202 to New York 22 south along Main Street in the village of Brewster. Photo taken 06/13/05.
A folded diamond interchange (Exit 10) joins the north end of Interstate 684 with U.S. 6-202 and NY 22 along the west side of East Branch Reservoir. U.S. 6/202 parallel I-84 east into Danbury. Westward the two highways separate at Brewser, with U.S. 6 continuing through the village center to the town of Carmel. Photo taken 06/26/05.
An end Interstate 684 shield stands within the exchange at Exit 10. NY 22 extends north from the freeway to the town of Patterson, the village of Pawling and NY 343 at the community of Wassaic. Photo taken 06/26/05.
Perspective from Interstate 684 south
New York 22 south expands into a four lane expressway just ahead of the Croton River. The state route transitions into Interstate 684 south at the forthcoming exchange with U.S. 6/202.
This guide sign was replaced after 2008. Photo taken 06/26/05.
Interstate 684 begins as New York 22 departs at Exit 10 for U.S. 6/202 west into the village of Brewster. New York 22 overlaps with U.S. 202 southwest 4.9 miles to Croton Falls.
This sign bridge was removed after 2008. Photo taken 06/26/05.
The first confirming marker for Interstate 684 stands a half mile north of Exit 9 (I-84) after the gore point at Exit 10. Photo taken 06/26/05.
An auxiliary lane opens along I-684 south over the bridge spanning U.S. 6/202 (Danbury Road) and the Housatonic Railroad line to Exit 9W with Interstate 84 west. Photo taken 06/26/05.
Replaced after 2008, button copy signs directed motorists along I-684 south to Newburgh via I-84 west and Danbury via the succeeding ramp to I-84 east. Photo taken 06/26/05.
The sign bridge for Exit 9E was removed without a replacement after 2008. I-84 arcs southeast between East Branch Reservoir and Cedar Swamp to the south of Joes Hill into Fairfield County, Connecticut. Interstate 84 combines with U.S. 7 north ahead of the Danbury city center in seven miles. Photo taken 06/26/05.
Perspective from Interstate 84 west
Traffic to both I-684 south to White Plains and New York 22 north to Pawling departs in unison from the westbound mainline of Interstate 84 at Exit 20. Photo taken by Douglas Kerr (06/02/02).
Historic perspective from Interstate 84 west
I-84 west at Interstate 684 south to White Plains and north to NY 22 not long after the completion of the freeway. Photo taken by Michael Summa (1970).
Perspective from Interstate 84 east
Interstate 84 travels southward between the village of Brewster and Lake Tonetta to the directional cloverleaf interchange (Exits 20S/N) with I-684. Photo taken 06/13/05.
Starr Ridge and Scott Ridge rise along the southern horizon as Interstate 84 lowers 180 feet in elevation toward Exit 20S for I-684 south to Westchester County and White Plains. Photo taken 06/13/05.
A 1,246 foot long viaduct built in 1970 carries eastbound I-84 over the Croton River East Branch, U.S. 6/202 & NY 22, Argonee Road and the Housatonic Railroad ahead of Interstate 684.2 Photo taken 06/13/05.
Sign changes made for Exit 20S by 2008 added New York City for Interstate 684 south and removed U.S. 6/202 and Brewster for Exit 20N and NY 22 north. Photo taken 06/13/05.
Eastbound Interstate 84 reaches Exit 22N for I-684 north to U.S. 6/202 (Danbury Road) and NY 22. This overhead assembly was removed by 2008. Photo taken 06/13/05.
Historic perspective from Interstate 84 east
Original button copy sign for the interchange connecting Interstate 84 east with I-684 near Brewster. Photo taken by Michael Summa (1970).
One mile west of I-684 on Interstate 84 east. I-84 opened to traffic at Brewster in 1970. Photo taken by Michael Summa (1970).

South End I-287 Hutchinson River Parkway – Purchase, New York

Perspective from Interstate 684 south
Two miles north of the directional T interchange with Interstate 287 on I-684 southbound. Photo taken 08/29/05.
Traffic partitions in one mile for the south branch of I-684 (Route 984J) to Hutchinson River Parkway, and the mainline west to Interstate 287 at White Plains. Photo taken 08/29/05.
An end shield stands at the wye interchange (Exit 1) with Route 984J to Hutchinson River Parkway. Hutchinson River Parkway extends south from Merritt Parkway (Connecticut 15) to Mount Vernon and the Bronx in New York. Photo taken 08/29/05.
Southbound at the left exit for Route 984J to Hutchinson River Parkway. Trucks are advised to remain along I-684 due to the restriction of commercial vehicles on the parkway south into New York City. A separate interchange however joins Route 984J with Manhattanville Road. Photo taken 08/29/05.
Interstate 684 splits with ramps for I-287 (Cross WestChester Expressway) to the immediate west. I-287 constitutes a regional bypass route of the New York metropolitan area east to I-95 at the city of Rye and west across the Governor Mario M. Cuomo Bridge (I-87) to Nyack. Photo taken 08/29/05.
Historic perspective from Interstate 684 south
Button copy signs formerly posted at the southbound split of I-684 with Route 984J to Hutchinson River Parkway. Photo taken by Douglas Kerr (06/00).
Sign replacements at the south end of I-684 added Westchester Avenue for I-287 west, referencing the local off-ramp to the city of White Plains. Photo taken by Douglas Kerr (06/02/02).
Perspective from Hutchinson River Parkway north
A cloverleaf interchange (Exit 26) joins Hutchinson River Parkway with Westchester Avenue, the frontage road system of Interstate 287, just prior to the split with Route 984J north to Interstate 684. Photo taken 06/13/05.
Exit 26E leaves Hutchinson River Parkway northbound for Interstate 287 east. I-287 concludes in 3.4 miles at the merge with I-95 northbound into Port Chester. The parkway mainline defaults onto I-684 northbound in 0.6 miles. Photo taken 06/13/05.
Hutchinson River Parkway expands to four northbound lanes from I-287 to the wye interchange with Route 984J. Photo taken 06/13/05.
Hutchinson Parkway turns east and weaves between neighborhoods of Purchase and Rye Brook to the state line where Merritt Parkway takes over. Route 984J branches northwest to The Centre business park and the I-684 mainline from I-287. Photo taken 06/13/05.
Perspective from Interstate 287 west
Approaching Interstate 684 north (Exit 9A) on westbound Interstate 287 (Cross Westchester Expressway) at milepost 7 and the Corporate Park Drive overpass. Photo taken 08/29/05.
Exit 9A leaves Interstate 287 west for I-684 north beyond the Bryant Avenue overpass. An adjacent on-ramp connects with I-684 from Westchester Avenue. Photo taken 08/29/05.
Perspective from Interstate 287 east
Original button copy sign posted a half mile west of the directional T interchange (Exit 9A) with I-684 north on Interstate 287 (Cross Westchester Expressway) eastbound. Photo taken 08/09/04.
Interstate 684 travels 17.5 miles north from I-287 to Katonah and 28 miles to I-84 outside the village of Brewster. Photo taken 08/09/04.
Exit 9A parts ways with I-287 east for both Interstate 684 north to Brewster and adjacent Westchester Avenue south to Bryant Avenue. Photo taken 08/09/04.


  1. Summa, Michael. Personal email.
  2. RTE I84 over RTE 6, E BR CROTON RIVER, Putnam County, New York.

Page updated February 18, 2019.