Interstate 84 in Connecticut

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Interstate 84

I-84 highlighted in red
Route information
Maintained by CTDOT
Length97.90 mi[1] (157.55 km)
NHSEntire route
Major junctions
West end I-84 at the New York state line in Danbury
Major intersections
East end I-84 at the Massachusetts state line in Union
CountryUnited States
CountiesFairfield, New Haven, Hartford, Tolland, Windham
Highway system
  • Connecticut State Highway System
Route 83 Route 85

Interstate 84 (I-84) is an east–west Interstate Highway across the state of Connecticut through Danbury, Waterbury, Hartford, and Union.

Route description

I-84 (looking eastbound) just before becoming an elevated viaduct to cross downtown Waterbury

I-84 enters Danbury from the town of Southeast, New York, and is designated the Yankee Expressway for the next 62 miles (100 km). About 3.5 miles (5.6 km) to the east, US Route 7 (US 7) joins from the south at exit 3 near Danbury Fair as I-84 turns north. At the next exit, US 6 and US 202 join to form a four-way concurrency for the next three miles (4.8 km) to exit 7, when US 7 and US 202 split off north toward New Milford. US 6 leaves the Interstate at the following exit, as I-84 climbs away from Danbury into the more rural towns of Bethel and Brookfield.

US 6 rejoins I-84 at exit 10, and, at exit 11, it turns to the northeast and descends to cross the Housatonic River on the Rochambeau Bridge, into New Haven County. After US 6 leaves once again at exit 15 in Southbury, I-84 proceeds through hilly terrain into Middlebury, becoming more of an urban freeway as it enters the city of Waterbury, where it intersects the Route 8 expressway and crosses the Naugatuck River on an elevated dual-decked viaduct known locally as the Mixmaster. After passing through Cheshire, I-84 intersects the western end of I-691 at the Cheshire–Southington town line, which is also the New Haven–Hartford county line.

I-84 turns more northerly for a stretch to exit 31 (Route 229), which provides access to Lake Compounce and ESPN World Headquarters. The freeway heads more northeasterly to Plainville, where it has a brief 0.5-mile (0.80 km) concurrency with Route 72 to the New Britain city line. From the Route 72 junction through Farmington, West Hartford, and into Hartford, I-84 has many left-hand exits and entrances and sharp curves, which were built for a planned network of freeways. In Farmington, US6  joins I-84 once again at exit 38 and both meet the northern end of the Route 9 expressway at a half-used multilevel stack interchange that was originally planned to be part of the mostly-canceled I-291 Hartford Beltway. I-84 and US 6 pass through West Hartford into Hartford (the largest city along the length of the eastern I-84) where they intersect I-91, just before US 44 briefly joins to cross the Connecticut River into East Hartford on the Bulkeley Bridge, which is the oldest bridge on the Interstate System.

After the bridge, US 44 leaves, the name of the highway changes to the Lieutenant Brian L. Aselton Memorial Highway, and I-84 meets the Route 2 expressway, which provides access to the southeastern suburbs of Hartford. As I-84 passes the northern end of the Route 15 expressway, it inherits the Wilbur Cross Highway name for the rest of its length. From 1968 until 1984, the I-84 designation ended here, and the highway became I-86 for the rest of its length, as I-84 was once planned to be built east toward Providence, Rhode Island. I-84 intersects one of the remnants of the abandoned project, I-384, as part of a three-mile (4.8 km) series of complex interchanges in Manchester including the end of the US 6 concurrency at exit 60, and a connection to the only built as originally planned portion of I-291 at exit 61.

Beyond Manchester, I-84 climbs steadily from the Connecticut River Valley and passes through the Tolland County towns of Vernon, Tolland, and Willington. After briefly entering the Windham County town of Ashford, it reenters Tolland County in the town of Union. After exit 74 (Route 171), I-84 crosses the Massachusetts state line. All lanes eventually enter into Sturbridge, but the westbound lanes pass briefly through the town of Holland before entering Sturbridge. Eight miles (13 km) later, I-84 reaches its eastern terminus at the Massachusetts Turnpike (I-90).


New York to Hartford

I-84 opened in stages from the New York State Line in Danbury starting in 1961, finally connecting to Hartford in 1969. In Hartford, it crossed the Bulkeley Bridge and continued along the existing Wilbur Cross Highway to Massachusetts. This western segment was briefly redesignated I-86.[2]

1970s route east of Hartford

Interstate 82

LocationEast HartfordProvidence
HistoryRedesignated as I-84 in 1968
NHSEntire route

Interstate 84

LocationEast HartfordProvidence
HistoryCanceled; completed sections redesignated as I-384 and US 6 in 1984
NHSEntire route

A highway connecting Hartford and Providence was first brought up in 1944 as an upgrade to US 6 from Manchester to the Rhode Island state line.[3][4] The plan eventually adapted to a submission to the 1956 Interstate Highway Plan but was declined. It was resubmitted in the 1968 plan and was granted along with 1,500 other miles (2,400 km) of Interstate.[5]

The highway was firstly designated as Interstate 82 (I-82) but was changed shortly after to its well-known designation, Interstate 84 (I-84).[5] In 1970 through 1973, the first segments of the highway started construction, the segment now designated as I-384, and the Willimantic Bypass.[3] When these isolated segments were completed, they were designated for the future Interstate, starkly different from today's signs. The signs remained on the Willimantic Bypass up to a decade after the cancellation of the project.[6]

The planned I-84 was going to also incorporate a cloverleaf intersection with I-295 in Johnston, Rhode Island, and use the under-construction Dennis J. Roberts Expressway and built Huntington Expressway to Providence before the project was shelved.[7] Briefly, there was an idea to use the southern/unused portion of the highway for Interstate 184 (I-184) but was disapproved by the FHA.[8]

An environmental study by the Rhode Island Department of Transportation (RIDOT) was done in 1972; it was found the highway would cause heavy impact to Scituate Reservoir, the main drinking supply for Providence.[9][10] After conducting multiple other studies, including briefly considering an alternate southern alignment that would bypass the Scituate Reservoir to the south and connected I-84 to the Route 37 Expressway, Rhode Island ended up canceling their segment of the highway in 1982, which ended up causing Connecticut to cut the segment to I-395 in Plainfield.[11] Without Rhode Island, the highway was fully canceled in 1983, and the mileage was returned for other projects.[12][13]

After the highway was canceled, the only inland route to Providence from Hartford was either US 44 or US 6. Many projects have since happened to improve the roads, mainly in Connecticut.[14][15] One major one was improving the "Suicide 6" area of US 6 between Bolton and Columbia.[16][17] Since the cancelation, other plans to have a freeway link between the two built segments have been proposed, including one in 2001, but was short lived, only lasting to 2003 before becoming dormant.[3][18]

In the 1992 long-range transportation plan released by RIDOT, a freeway has been added along the original route of I-84 that will connect to the Route 695 freeway on the Rhode Island–Connecticut border.[19]

I-86 relation

Interstate 86

LocationEast HartfordUnion (Massachusetts state line)
Length31.27 mi (50.32 km)
HistoryRedesignated as I-84 in August 1984[20]
NHSEntire route

The section of I-84 between East Hartford, Connecticut, (at the present-day junction with I-384) and Sturbridge, Massachusetts, (I-90) was for a time signed as I-86 (unrelated to present-day I-86 in New York and Pennsylvania). Signs stating "I-84 Ends, I-86 to Boston" (eastbound) and "I-86 Ends, I-84 to Hartford" (westbound) were posted where the change took place. Exit numbering on I-86 was that of the road's predecessor, Route 15, in a sequence beginning on New York's Hutchinson River Parkway. Exits were renumbered to correspond with the rest of I-84 in Connecticut when the road was redesignated in 1984. The present I-384 as well as the present US 6 bypass near Willimantic, both of which were a part of what was then I-84's planned easterly continuation, were also numbered I-84 prior to 1984 even though they lacked any direct connection to the rest of I-84 at that time. (One had to use Silver Lane in East Hartford to travel between the two stretches of the highway.) These two sections were renumbered. The western segment became I-384, and the eastern one became part of US 6 when what was then I-86 was renumbered I-84.


Danbury Rest Area and Information Center on I-84 eastbound

Sections of I-84 in Connecticut were reconstructed and widened from the mid 1970s into the mid 1980s. Another section through Danbury was widened from four lanes to six lanes in 1985 and 1986. Widening of the highway through Danbury was funded by Union Carbide as part of building its world headquarters in Danbury.[21] From roughly 1976 to 1988 the former I-86 portion from East Hartford to the Massachusetts state line was completely rebuilt from a narrow four-lane parkway to a much wider profile ranging from six lanes at the Massachusetts state line, expanding to eight lanes in Vernon, to 12 lanes with high-occupancy vehicle lanes (HOV lanes) in East Hartford. The original route, then known as Route 15, featured pit latrines at its pull-offs or rest areas. As of 2014, planning is underway for the I-84 Hartford Project to replace and possibly redesign a two-mile (3.2 km) stretch of mostly elevated highway in Hartford. On April 22, 2015, construction began on widening the highway from exit 23 to exit 25A in Waterbury from four lanes to six lanes.

A widening project along the congested stretch of I-84 through Waterbury and Cheshire has been beset by cost overruns, delays, and construction defects involving storm drains,[22] as state and federal officials have launched criminal investigations stemming from this project. This episode has waned local enthusiasm for a proposed $2-billion reconstruction of the Mixmaster interchange in downtown Waterbury.[23] Cost estimates for the Mixmaster replacement have increased to $3 billion.[24] Connecticut Attorney-General Richard Blumenthal has begun a lawsuit against the contractor and an engineering firm in response to threats from the US Department of Transportation (USDOT) to withhold funds from the project.[25] On May 18, 2007, the Republican-American reported this area had defective light poles,[26] while Governor Jodi Rell released an audit report of the construction disaster.[27]


The I-84 Hartford Project[28] is a Connecticut Department of Transportation (CTDOT) project to address structural deficiencies within the I-84 corridor approximately between Flatbush Avenue (exit 45) and the I-91 interchange in Hartford, including a 3,200-foot (980 m) elevated section known as the Aetna Viaduct. Since it became apparent in the 1980s that this section of I-84 in Hartford was deteriorating, CTDOT has considered how best to repair or reconstruct the corridor. Since that time, many inspections have been carried out and frequent repairs made to keep the highway safe and functioning.[29]

In 2010, the Capitol Region Council of Governments (CRCOG), the City of Hartford, and CTDOT collaborated on a study of the corridor to begin the process of exploring reconstruction options. That study looked at several concepts, including the rebuilding of the viaduct "in-kind", as well as several reconstruction alternatives that would alter the configuration of the highway. The alternatives developed for that study were conceptual in nature—they did not look in depth at traffic, engineering feasibility, or environmental impact. However, the strong stakeholder input as part of that effort was helpful in leading to CTDOT's decision to initiate the I-84 Hartford Project, to build on the good work of that earlier study. The I-84 Hartford Project will be a full and comprehensive evaluation leading to a workable solution. The I-84 Hartford Project will examine the feasibility and assess the impact of a range of concepts. Following full examination of the impacts and benefits of feasible alternatives, and, in collaboration with stakeholders and the public, CTDOT will make a final decision on how to reconstruct this section of the I-84 corridor.[30][31]

Exit list

I-84 west – Newburgh
Continuation into New York; to I-684
1Saw Mill RoadEastbound exit and westbound entrance extend into New York
2 US 6 / US 202 (Mill Plain Road) / Old Ridgebury RoadSigned as exits 2A (Old Ridgebury) and 2B (US 6/US 202) westbound
Rest Area/Welcome CenterShared ramp with exit 2; eastbound exit and entrance
US 7 south – Norwalk
Western terminus of US 7 concurrency; also serves Danbury Airport
US 6 / US 202 west (Lake Avenue)
Western terminus of US 6/US 202 concurrency
5.278.485 Route 39 / Route 53 – Downtown Danbury, BethelRoute 37 only appears on eastbound signage
5.849.406 Route 37 – New FairfieldWestbound exit and eastbound entrance

US 7 north / US 202 east – Brookfield, New Milford
Eastern terminus of US 7/US 202 concurrency
DanburyBethel line8.17–
US 6 east / Newtown Road – Bethel
Eastern terminus of US 6 concurrency; US 6 not signed westbound
BrookfieldNewtown line11.4418.419 Route 25 – BrookfieldSigned for Hawleyville
US 6 west – Newtown, Sandy Hook
Western terminus of US 6 concurrency;
Route 34 east – Derby, New Haven
Access via SSR 490
Housatonic River18.4829.74Rochambeau Bridge
New HavenSouthbury18.7430.1613River RoadEastbound exit and westbound entrance
20.2132.5214 Route 172 – South Britain
US 6 east / Route 67 – Southbury
Eastern terminus of US 6 concurrency
24.8039.9116 Route 188 – Southford, MiddleburyNo westbound signage for Middlebury
MiddleburyWaterbury line29.8147.9717 Route 63 – Watertown, NaugatuckEastbound signage
30.4849.05 Route 64 / Route 63 – Middlebury, WatertownWestbound signage
Waterbury31.3550.4518Chase ParkwayEastbound signage
31.6550.94West Main Street / Highland AvenueWestbound signage
32.0251.5319-20 Route 8 – Bridgeport, TorringtonMixmaster Interchange; signed as exits 19 (south) and 20 (north); exits 30A-C on Route 8
21Meadow Street / Bank Street
22Baldwin Street / Union Street – Downtown WaterburySigned for Baldwin Street eastbound, Union Street westbound
23 Route 69 (Hamilton Avenue) – Wolcott, ProspectEastbound access via separate exits, on collector-distributor road
34.3655.3025Harpers Ferry Road / Reidville DriveEastbound signage
35.6257.32East Main Street/Scott RoadWestbound signage
36.7359.1125AAustin RoadServes University of Bridgeport
Cheshire38.1261.3526 Route 70 – Cheshire, ProspectNo eastbound signage for Prospect
I-691 east – Meriden
Western terminus of I-691; exits 8A-B on I-691
HartfordSouthington40.6865.4728 Route 322 – Marion, Milldale, Wolcott
41.8967.4229 Route 10 – MilldaleWestbound left exit and eastbound entrance; via SR 597
42.5268.4330West Main Street / Marion AvenueSigned eastbound for Downtown Southington/ Plainsville
44.3471.3631 Route 229 (West Street) – BristolLake Compounce Amusement Park and ESPN World Headquarters
46.2374.4032 Route 10 (Queen Street)Signed westbound for Downtown Southington
Route 72 west – Bristol
Eastbound exit and westbound entrance; exit 4A on Route 72
49.4179.5234 Route 372 / Crooked Street (SR 536) – PlainvilleWestbound exit is via exit 33
Route 72 west – Bristol
Western terminus of Route 72 concurrency; westbound exit and eastbound entrance
New Britain50.00–

Route 72 east to Route 9 – New Britain, Middletown
Eastern terminus of Route 72 concurrency
36Slater RoadLeft exit eastbound

Fienemann Road to US 6 west
US 6 not signed westbound
US 6 west – Bristol
Western terminus of US 6 concurrency; westbound exit and eastbound entrance
54.3587.4739 Route 4 – FarmingtonAccess via SR 508
Route 9 south – Newington
Northern terminus of Route 9
West Hartford56.2790.5640 Route 71 (New Britain Avenue) – Corbins Corner
57.2392.1041South Main Street - Elmwood
58.0593.4242Trout Brook Drive - ElmwoodWestbound exit and eastbound entrance
43Park Road – West Hartford CenterAccess via SR 501
59.1795.2244Prospect Avenue / Oakwood AvenueAccess via Caya Avenue eastbound, Kane Street westbound
Hartford59.9396.4545Flatbush AvenueWestbound exit and eastbound entrance; via SR 504
46Sisson Avenue / West BoulevardAccess via SR 503; part of once planned Route 9 (later Route 189) expressway
61.0498.2347Sigourney StreetWestbound exit and eastbound entrance
48BAsylum StreetSigned as exit 48 westbound
48ACapitol AvenueEastbound exit and westbound entrance
61.9999.7649Chapel Street / High Street / Ann Uccello StreetEastbound exit and westbound entrance
62.0499.8450Main StreetEastbound exit and westbound entrance
51-52 I-91 – New Haven, Springfield, Bradley International AirportSigned as exits 51 (north) and 52 (south); no westbound access to I-91 south; exits 38A-C on I-91

US 44 west (Main Street) to I-91 south – Downtown Hartford, New Haven
Western terminus of US 44 concurrency; westbound exit and eastbound entrance
Connecticut River62.58–
Bulkeley Bridge
East Hartford62.95101.3153
US 44 east (Connecticut Boulevard) / East River Drive – East Hartford
Eastern terminus of US 44 concurrency; no westbound exit
Route 2 east – Norwich, New London, Downtown Hartford
Signed as exits 54 (Downtown Hartford) and 55 (Route 2); no eastbound access to Downtown Hartford; western terminus of westbound HOV lanes
56Governor Street – Downtown East HartfordAccess via SR 500; exit was originally intended for the never-built I-284
US 5 (Main Street)Westbound entrance only
Restricted Lanes – Buses and 2 person car poolsWestern terminus of eastbound HOV lanes

Route 15 south (Wilbur Cross Highway) to I-91 south – Charter Oak Bridge, New York City
Westbound exit and eastbound entrance
Silver LaneHOV access only; westbound exit and eastbound entrance
58Roberts Street (SR 518) / Silver Lane (SR 502) / Burnside Avenue
I-384 east – Providence
Western terminus of I-384; Silver Lane/Spencer Street (I-384 exit 1B) not signed eastbound

I-384 east – Providence
HOV access only; eastbound exit and westbound entrance
US 6 east / US 44 (Middle Turnpike West) / Burnside Avenue – Manchester, East Hartford
Eastern terminus of US 6 concurrency; westbound exit shares a ramp with exit 62

I-291 west to I-91 – Windsor
Eastern terminus of I-291, exits 6B-C eastbound.
69.84112.4062Buckland StreetWestbound access via Pleasant Valley Road
Buckland StreetHOV access only; eastbound exit and westbound entrance
71.60115.2363 Route 30 / Route 83 – South Windsor, Manchester
Route 30 / Route 83 south – Vernon Business District, Rockville, Talcottville
Eastbound exit shares a ramp with exit 65
Route 30 / Route 83 – Vernon Center, RockvilleHOV access only; eastbound exit and westbound entrance
73.27117.92Eastern terminus of HOV lanes
Route 30 north – Vernon Center
74.80120.3866Tunnel Road – Vernon, Bolton
77.28124.3767 Route 31 – Rockville, Coventry
Tolland81.06130.4568 Route 195 – Tolland, Mansfield, StorrsServes University of Connecticut
Route 74 to US 44 – Willington, Putnam
Westbound signage indicates Putnam, eastbound signage indicates Willington
Willington85.58137.7370 Route 32 – Stafford Springs, Willington, Mansfield, Willimantic
Route 320 south (Ruby Road)
county line
AshfordUnion line92.05148.1472 Route 89 – Westford, Ashford
TollandUnion93.41150.3373 Route 190 – Union, Stafford Springs
97.38156.7274 Route 171 / Holland Road – Union, Holland, Mass
I-84 east (Wilbur Cross Highway) – Boston
Continuation into Massachusetts; to Mass Pike
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Auxiliary routes

Interstate City Notes
I-284.svg Interstate 284 East Hartford Unfinished and decommissioned. Partially exists as a freeway stub from I-84 to Governor Street. I-284 was originally planned to continue northward along the east bank of the Connecticut River to I-291.
I-384.svg Interstate 384 Manchester
I-484.svg Interstate 484 Hartford Unfinished and decommissioned. Partially exists as the Conland–Whitehead Highway
I-684.svg Interstate 684 Greenwich This route extends for 1.4 miles (2.3 km) in Connecticut, with all interchanges in New York; originally designated as I-87


  1. ^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved August 10, 2022.
  2. ^ "Connecticut I-84".
  3. ^ a b c Oglesby, Scott. "From Hartford to Providence". Retrieved November 15, 2016.
  4. ^ "Road Plan Urged for Connecticut; Highway Department Favors $400,000,000 Long-Range System of Expressways". The New York Times. March 31, 1953. ISSN 0362-4331. Retrieved November 16, 2016.
  5. ^ a b "Dennis J Roberts Expressway (US 6)". Retrieved November 15, 2016.
  6. ^ Oglesby, Scott. "Connecticut I-384". Retrieved November 15, 2016.
  7. ^ I-84 Extension from I-295 to the Connecticut State Line: Environmental Impact Statement. 1972.
  8. ^ "Huntington Expressway (RI 10 and US 6)". Retrieved November 16, 2016.
  9. ^ "677 F.2d 259". Retrieved November 16, 2016.
  10. ^ I-84 Extension from I-295 to the Connecticut State Line: Environmental Impact Statement. 1972.
  11. ^ Wald, Matthew L. (October 16, 1979). "Goldschmidt Says I‐84 to Proceed In Connecticut, but He Is Doubted". The New York Times. ISSN 0362-4331. Retrieved November 16, 2016.
  12. ^ I-84, Section 2 Corridor Location Between Windham and Rhode Island State Line: Environmental Impact Statement. 1976.
  13. ^ I-84, Section 1, Corridor Location Between Manchester and Columbia: Environmental Impact Statement. 1976.
  14. ^ US-6 Improvements, Killingly, CT to Johnston, RI: Environmental Impact Statement. 1985.
  15. ^ "Army Corps Considers Route 6". Hartford Courant. Retrieved November 16, 2016.
  16. ^ "Report: Connecticut Has Nation's Deadliest Rural Roads". Hartford Courant. Retrieved November 15, 2016.
  17. ^ "Getting Ready To Start Route 6 Project". Hartford Courant. Retrieved November 16, 2016.
  18. ^ "MTR 258, Third Time as Farce: ConnDOT Tries Again for Twice-rejected Road -". Archived from the original on May 12, 2016. Retrieved November 16, 2016.
  19. ^ Anderson, Steve. "Dennis J Robers Expressway (US 6)".
  20. ^ "State Changes Route Designation". The North Adams Transcript. North Adams, Massachusetts. August 15, 1984. p. 3. Retrieved September 14, 2019 – via
  21. ^ "Do You Remember?". Danbury News-Times. September 4, 2005.
  22. ^ "Storm Drains". News Times. April 24, 2007. Retrieved December 30, 2017.
  23. ^ "Interchange Construction Planned: For 2021". Hartford, CT: WFSB-TV. September 25, 2006. Archived from the original on September 27, 2007. Retrieved April 16, 2011.
  24. ^ [1][dead link]
  25. ^ "Topic Galleries". Hartford Courant. Archived from the original on January 21, 2013. Retrieved April 16, 2011.
  26. ^ "Light poles". News Times. May 19, 2007. Retrieved December 30, 2017.
  27. ^ Cooper, Chris (May 28, 2007). "Governor Rell: I-84 Consultant Releases Final Audit Report" (Press release). Office of the Governor. Retrieved April 16, 2011.
  28. ^ "I-84 Hartford Project". Retrieved 2022-08-11.
  29. ^ "Aetna Viaduct". Retrieved December 30, 2017.
  30. ^ Hyman, Dylan (September 8, 2016). "I-84 Hartford viaduct project moving forward". New Haven, CT: WTNH-TV. Retrieved September 11, 2016.
  31. ^ "DOT: No Tunnel For New I-84 In Hartford". Hartford Courant. Retrieved September 11, 2016.
  32. ^ Roadway Inventory Section (December 31, 2014). Highway Log: Connecticut State Numbered Routes and Roads (PDF). Connecticut Department of Transportation. Archived from the original (PDF) on September 5, 2015. Retrieved August 21, 2016.

External links

Interstate 84
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New York
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