Interstate 84 in Connecticut

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Interstate 84 marker

Interstate 84
Route information
Maintained by ConnDOT
Length:97.90 mi (157.55 km)
Existed:1969 – present
Major junctions
West end: I-84 near Brewster, NY
  US 7 / US 202 in Danbury
Route 8 in Waterbury
I-691 near Cheshire
Route 9 near W. Hartford
I-91 in Hartford
Route 2 / Route 15 near E. Hartford
I-384 / I-291 near Manchester
East end: I-84 near Sturbridge, MA
Highway system
Route 83Route 85
  (Redirected from I-84 (CT))
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Interstate 84 marker

Interstate 84
Route information
Maintained by ConnDOT
Length:97.90 mi (157.55 km)
Existed:1969 – present
Major junctions
West end: I-84 near Brewster, NY
  US 7 / US 202 in Danbury
Route 8 in Waterbury
I-691 near Cheshire
Route 9 near W. Hartford
I-91 in Hartford
Route 2 / Route 15 near E. Hartford
I-384 / I-291 near Manchester
East end: I-84 near Sturbridge, MA
Highway system
Route 83Route 85

Interstate 84 is an East–West Interstate highway across the state of Connecticut into Danbury, Waterbury, Hartford and Union.

Route description[edit]

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

The interstate's first exit is at the state line, where it enters the city of Danbury. Here it is designated the Yankee Expressway. Two miles to the east, where US 7 comes in from the south near Danbury Fair Mall to join I-84, it turns to the north. At the next exit, routes 6 and 202 join the highway.

The four-way concurrency ends after 3 miles (4.8 km), when 7 and 202 split off north towards New Milford. Route 6 leaves the interstate at the next exit, and I-84 continues east across the countryside. At Exit 11 it turns to the northeast and descends to cross the Housatonic River on the Rochambeau Bridge, into New Haven County, then climbs into higher ground to the city of Waterbury, which it passes on an elevated viaduct with the eastbound and westbound lanes on different levels. Here the CT 8 expressway intersects.

The eastern heading continues past Waterbury to Milldale, where Interstate 691 splits off to the east. This section has many left-hand exits and entrances and sharp curves, which were built for a planned network of freeways. I-84 heads northeast towards New Britain and Hartford, the state capital and the largest community along its eastern length. After intersecting Interstate 91, the road crosses the Connecticut River on the Bulkeley Bridge, oldest on the Interstate system, then becomes the Wilbur Cross Highway and continues towards the northeast.

I-84 climbs steadily from the Connecticut River Valley and reaches the highest Interstate elevation in Connecticut near exit 73 in Union at 1,008 feet (307 m).[1] The last exit in Connecticut is Exit 74, for Route 171 before crossing the Massachusetts border.


Road to Providence[edit]

Interstate 84 was originally to head east from Hartford, Connecticut to Providence, Rhode Island.

Original route[edit]

The original route of Interstate 84 would have used present-day Interstate 384 to Bolton, Connecticut, then along a never-built section of freeway that would have connected to the US 6 bypass around Willimantic, Connecticut. Another never-built freeway section would have connected it to Interstate 395 and extended I-84 onto State Road 695 in Connecticut, the easternmost portion of the Connecticut Turnpike in Killingly, Connecticut. From there, it would have roughly followed US 6 through western Rhode Island to connect to the present-day US 6 freeway in Johnston. From there, a freeway from Olneyville Square to the Interstate 95Interstate 195 interchange was briefly considered, but abandoned in favor of what later became the Route 6-10 Connector.


Sections of I-84 in Connecticut were reconstructed and widened in the 1980s. The former I-86 portion from East Hartford to the Massachusetts state line was completely rebuilt from a narrow 4-lane freeway to a much wider profile ranging from 6 lanes at the Massachusetts state line, expanding to 8 lanes in Vernon, to 12 lanes with HOV lanes in East Hartford. Another section through Danbury was widened from 4 lanes to 6 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.[2]

Environmental concerns[edit]

Though the route was basically set in stone in Connecticut, many issues remained in Rhode Island, the biggest of which were major environmental concerns about how the freeway would affect the Scituate Reservoir, which is the main drinking water supply for Providence.

Long-range plans[edit]

In the 1992 long-range transportation plan released by the Rhode Island Department of Transportation, a freeway has been added along the original route of Interstate 84 that will connect to the CT 695 freeway on the Rhode IslandConnecticut border.[3]

I-86 relation[edit]

The section of I-84 between East Hartford, Connecticut (at the present-day junction with Interstate 384) and Sturbridge, Massachusetts (Interstate 90) was for a time signed as Interstate 86 (unrelated to present-day Interstate 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 re-numbered I-384 and Rte 6 when what was then I-86 was re-numbered I-84.

Widening projects in Waterbury[edit]

A widening project along the congested stretch of I-84 through Waterbury and Cheshire, Connecticut has been beset by cost overruns, delays, and construction defects involving storm drains,[4] 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.[5] Cost estimates for the Mixmaster replacement have increased to $3 billion.[6] CT Attorney General Richard Blumenthal has begun a lawsuit against the contractor and an engineering firm in response to threats from the U.S. DOT to withhold funds from the project.[7] On May 18, 2007, the Waterbury Republican-American reported this area had defective light poles,[8] while Governor M. Jodi Rell released an audit report of the construction disaster.[9] A number of DOT personnel were either fired or reprimanded following the scandal. Meanwhile[when?] the FBI and a federal grand jury are investigating the now-defunct construction company and the same DOT officials, which may eventually lead to criminal charges in the case.

Auxiliary routes in Connecticut[edit]

I-384.svgInterstate 384ManchesterSpur
I-684.svgInterstate 684GreenwichBypass routeThis route has no exits in Greenwich but in New York.

Exit list[edit]

Danbury0.000.00 I-84 west – NewburghContinuation into New York
0.290.471Saw Mill Rd. – Ridgebury
1.231.982Old Ridgebury Rd. – Ridgebury, Mill PlainAccess to the Connecticut Welcome Center eastbound
4.547.313 US 7 south – NorwalkSouth end of US 7 overlap
4.737.614 US 6 / US 202 west (Lake Ave.)West end of US 6/US 202 overlap
5.989.625 Route 39 / Route 53 to Route 37 – Downtown Danbury, Bethel, New FairfieldSigned as Route 39 / Route 53 westbound
6.4810.436 Route 37 – New Fairfield, DanburyWestbound exit and eastbound entrance
7.1611.527 US 7 north / US 202 east – Brookfield, New MilfordNortheast end of US 7/US 202 overlap
7.9112.738 US 6 east (Newtown Rd., SR 911) – BethelEast end of US 6 overlap
Newtown10.7917.369 Route 25 – Hawleyville, Brookfield, Newtown
14.1022.6910 US 6 west – Newtown, Sandy HookWest end of US 6 overlap
15.2324.5111 Route 34 east – Derby, New HavenConnection to Route 34 is SSR 490
To Route 25 – Bridgeport
Housatonic River
17.9728.92Rochambeau Bridge
New Haven
Southbury18.6430.0013River Rd. – SouthburyEastbound exit and westbound entrance
19.8331.9114 Route 172 / Georges Hill Rd. – South Britain, Southbury
21.5834.7315 US 6 east / Route 67 – Southbury, Oxford, WoodburyEast end of US 6 overlap
24.2639.0416 Route 188 – Middlebury, Southford
Middlebury28.8946.4917 Route 63 – Watertown, NaugatuckEastbound exit and westbound entrance
Waterbury29.3547.2317 Route 64 west – Middlebury, WoodburyWestbound exit and eastbound entrance
30.4549.0018Chase Parkway (SR 845) – WaterburyEastbound exit and westbound entrance
30.7249.4418W. Main St., Highland Ave. – WaterburyWestbound exit and eastbound entrance
31.0850.0219 Route 8 south – Naugatuck, Bridgeport
31.0850.0220 Route 8 north – Thomaston, Torrington
31.2050.2121Meadow St., Bank St.The Mixmaster
31.5850.8222Baldwin St.  – Downtown Waterbury (EB)
Union St.  – Downtown Waterbury (WB)
33.7454.3023 Route 69 (Hamilton Ave.) – Wolcott, Prospect
34.3655.3024Harpers Ferry Rd.No entrance ramps; signed as exit 25 eastbound
35.1856.6225Reidville Rd., E. Main St., Scott Rd.Eastbound exit is via exit 25 (Harpers Ferry Road)
36.1158.1125AAustin Rd. – Waterbury, Prospect
Cheshire37.3060.0326 Route 70 – Cheshire
39.4963.5527 I-691 east – Cheshire, Meriden
Southington39.8664.1528 Route 322 – Marion, Milldale, Wolcott
41.0566.0629 Route 10 – MilldaleWestbound exit and eastbound entrance, connection is SR 597
41.6166.9630W. Main St., Marion Ave. – Downtown Southington, Plantsville
43.3669.7831 Route 229 – Bristol, Southington, Plantsville
45.1872.7132 Route 10 – Southington, Plainville
Plainville48.2477.6333 Route 72 west – BristolWest end of Route 72 overlap
50.3481.0134 Route 372 / Crooked St. – PlainvilleNo westbound exit, eastbound exit only
New Britain50.3481.0135 Route 72 east – New BritainEast end of Route 72 overlap
51.0382.1236Slater Rd. – New Britain
Farmington52.0183.7037Fienemann Rd. – New Britain, Farmington
54.0386.9538 US 6 west – BristolWest end of US 6 overlap
54.4087.5539 Route 4 – West Hartford, FarmingtonConnection is SR 508
55.4689.2539A Route 9 south – Newington, New Britain
West Hartford56.3190.6240 Route 71 – West Hartford, New Britain (EB)
Ridgewood Rd. – West Hartford (WB)
57.1591.9741 Route 173 (S. Main St.) – West Hartford, Newington
59.1395.1642Trout Brook Dr. – ElmwoodWestbound exit and eastbound entrance
59.1395.1643Park Rd. – West Hartford CenterConnection is SR 501
60.0696.6644Caya Ave., Kane St., Prospect Ave. – West Hartford
Hartford60.5697.4645Flatbush AvenueWestbound exit and eastbound entrance; connection is SR 504
61.3898.7846Sisson Ave., West Blvd.Connection is SR 503
61.7599.3847Sigourney StreetWestbound exit and eastbound entrance
62.31100.2848AAsylum AvenueSigned as exit 48 westbound
62.31100.2848BCapitol AvenueEastbound exit and westbound entrance
62.69100.8949Chapel St., High St., Ann Ucello St.Eastbound exit and westbound entrance
62.88101.2050 US 44 west (Main St.) – Downtown HartfordWest end of US 44 overlap
63.13101.6051 I-91 north – Windsor LocksAccess to the Bradley International Airport
63.21101.7352 I-91 south – WethersfieldEastbound exit and westbound entrance
Connecticut River63.30101.87Bulkeley Bridge
East Hartford63.50102.1953 US 44 east (Connecticut Blvd.) – East HartfordEast end of US 44 overlap; no westbound exit; also connects with East River Drive
63.94102.9054 Route 2 west – Downtown HartfordHOV exit; Westbound exit and eastbound entrance
63.94102.9055 Route 2 east – Glastonbury
63.95102.9256Governor St. – Downtown East HartfordConnection is SR 500
63.98102.97 I-84 east (Restricted Lanes)Western terminus of I-84 Restricted Lanes
64.88104.4157 Route 15 south – Wethersfield, NewingtonWestbound exit and eastbound entrance.
65.41105.2758Roberts St. (SR 518), Silver Ln. (SR 502) – E. HartfordHOV exit to Silver Lane westbound
66.63107.2359 I-384 east – Bolton, WillimanticHOV exit to I-384 eastbound
Manchester67.28108.2860 US 6 east / US 44 – Manchester, East HartfordEast end of US 6 overlap; westbound exit combined with exit 62
67.78109.0861 I-291 west – South Windsor, Windsor
68.96110.9862Buckland St. – South Windsor, ManchesterHOV exit
70.65113.7063 Route 30 / Route 83 – Manchester, South Windsor
Vernon72.03115.9264 Route 30 / Route 83 – Vernon, Rockville, TalcottvilleHOV exit; Eastbound exit 65 leaves I-84 on the same ramp as exit 64
73.04117.5565 Route 30 – Vernon CenterEastbound exit is combined with exit 64
73.07117.59 I-84 west (Restricted Lanes)Eastern terminus of I-84 Restricted Lanes
74.23119.4666Tunnel Rd.  – Vernon, Bolton
76.03122.3667 Route 31 – Rockville, Coventry
Tolland79.56128.0468 Route 195 – Tolland, Mansfield, Storrsaccess to the University of Connecticut
83.38134.1969 Route 74 – Willington, Tolland, Rockville
Willington85.14137.0270 Route 32 – Stafford Springs, Willington, Mansfield
87.10140.1771 Route 320 south (Ruby Rd.) – Willington
91.20146.7772 Route 89 – Stafford Springs, Westford, Ashford
Union92.41148.7273 Route 190 – Union, Stafford Springs
96.62155.4974 Route 171 / Holland Rd. – Union, Holland, MA
97.90157.55 I-84 east – BostonContinuation into Massachusetts
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ "Elevation Finder". Retrieved 2013-01-29. 
  2. ^ Do You Remember? Danbury News-Times, Sep 4, 2005
  3. ^ Anderson, Steve. "Dennis J Robers Expressway (US 6)". 
  4. ^  Missing or empty |title= (help)[dead link]
  5. ^ POSTED: 3:21 pm EDT September 25, 2006 (2006-09-25). "Interchange Construction Planned - For 2021 - Connecticut News Story - WFSB Hartford". Retrieved 2011-04-16. 
  6. ^ [1][dead link]
  7. ^ "Topic Galleries". Retrieved 2011-04-16. 
  8. ^ [2][dead link]
  9. ^ Office of the Governor (2007-05-28). "Governor Rell: I-84 Consultant Releases Final Audit Report". Retrieved 2011-04-16. 

External links[edit]

Route map: Google / Bing

Interstate 84
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