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:1944 – 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
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Interstate 84 marker

Interstate 84
Route information
Maintained by ConnDOT
Length:97.90 mi (157.55 km)
Existed:1944 – 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

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

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

Original route

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

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

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

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

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.

Exit list

Danbury0.040.06 I-84 west – NewburghContinuation into New York
0.190.311Saw Mill Rd. – Ridgebury
1.131.822Old Ridgebury Rd. – Ridgebury, Mill PlainAccess to the Connecticut Welcome Center eastbound
3.445.543 US 7 south – NorwalkSouth end of US 7 overlap
3.635.844 US 6 / US 202 west (Lake Ave.) – Mill PlainWest end of US 6/US 202 overlap
4.887.855 Route 39 / Route 53 to Route 37 – Downtown Danbury, Bethel, New Fairfield
5.388.666 Route 37 – New Fairfield, DanburyWestbound exit and eastbound entrance
6.069.757 US 7 north / US 202 east – Brookfield, New MilfordNortheast end of US 7/US 202 overlap
6.8110.968 US 6 east (Newtown Road, SR 911) – BethelEast end of US 6 overlap
Newtown9.6915.599 Route 25 – Brookfield, Hawleyville, Newtown
13.0020.9210 US 6 west – Newtown, Sandy HookWest end of US 6 overlap
14.1322.7411 Route 34 east – Derby, New HavenConnection to Route 34 is SSR 490
To Route 25 – Bridgeport
Housatonic RiverRochambeau Bridge
New Haven
Southbury16.4426.4613River Road – SouthburyEastbound exit and westbound entrance
17.6328.3714 Route 172 north – South Britain
19.3831.1915 US 6 east / Route 67 – Southbury, Oxford, WoodburyEast end of US 6 overlap
22.0635.5016 Route 188 – Middlebury, Southford
Middlebury26.6942.9517 Route 63 – Watertown, NaugatuckEastbound exit and westbound entrance
Waterbury27.1543.6917 Route 64 west – Middlebury, WoodburyWestbound exit and eastbound entrance
28.2545.4618Chase Parkway (SR 845) – WaterburyEastbound exit and westbound entrance
28.5245.9018W. Main St., Highland Ave. – WaterburyWestbound exit and eastbound entrance
28.8846.4819 Route 8 south – Naugatuck, Bridgeport
28.8846.4820 Route 8 north – Thomaston, Torrington
29.0046.6721Meadow Street, Bank StreetThe Mixmaster
29.3847.2822Baldwin Street  – Downtown Waterbury (EB)
Union Street – Downtown Waterbury (WB)
30.4448.9923 Route 69 (Hamilton Ave.) – Wolcott, Prospect
31.0649.9924Harpers Ferry Rd.No entrance ramps; signed as exit 25 eastbound
31.8851.3125Reidville Rd., E. Main St., Scott Rd.Eastbound exit is via exit 25 (Harpers Ferry Road)
32.8152.8025AAustin Rd. – Waterbury, Prospect
Cheshire34.0054.7226 Route 70 / Waterbury Rd. – Cheshire, Prospect
36.1958.2427 I-691 east – Cheshire, Meriden
Southington36.5658.8428 Route 322 – Marion, Milldale, Wolcott
37.7560.7529 Route 10 – MilldaleWestbound exit and eastbound entrance, connection is SR 597
38.3161.6530W. Main St., Marion Ave. – Downtown Southington, Plantsville
40.0664.4731 Route 229 (West St.) – Bristol
41.8867.4032 Route 10 (Queen St.) – Southington, Plainville
Plainville44.9472.3233 Route 72 west – BristolWest end of Route 72 overlap
45.9473.9334 Route 372 / Crooked St. – PlainvilleNo westbound exit, eastbound exit only
New Britain45.9473.9335 Route 72 east – New BritainEast end of Route 72 overlap
46.6375.0436Slater Rd. – New Britain
Farmington48.8178.5537Fienemann Rd. – New Britain, Farmington
49.6379.8738 US 6 west – BristolWest end of US 6 overlap
50.0080.4739 Route 4 – West Hartford, FarmingtonConnection is SR 508
51.0682.1739A Route 9 south – Newington, New Britain
West Hartford51.8183.3840 Route 71 – West Hartford, New Britain (EB)
Ridgewood Ave. – West Hartford (WB)
52.7584.8941 Route 173 (S. Main St.) – West Hartford, Newington
53.6386.3142Trout Brook Drive – ElmwoodWestbound exit and eastbound entrance
53.6386.3143Park Road – West Hartford CenterConnection is SR 501
54.5687.8144Prospect Ave. – West Hartford
Hartford55.0688.6145Flatbush AvenueWestbound exit and eastbound entrance; connection is SR 504
55.8889.9346Sisson AvenueConnection is SR 503
56.2590.5347Sigourney StreetWestbound exit and eastbound entrance
56.8191.4348AAsylum StreetSigned as exit 48 westbound
56.8191.4348BCapitol Ave.Eastbound exit and westbound entrance
57.1992.0449Ann Ucello St.Eastbound exit and westbound entrance
57.3892.3450 US 44 west (Main Street) – Downtown HartfordWest end of US 44 overlap
57.6392.7551 I-91 north – Windsor LocksAccess to the Airport Sign.svg Bradley International Airport
57.7192.8852 I-91 south – WethersfieldEastbound exit and westbound entrance
Connecticut RiverBulkeley Bridge
East Hartford58.0093.3453 US 44 east (Connecticut Blvd.) – East HartfordEast end of US 44 overlap; no westbound exit; also connects with East River Drive
58.4494.0554 Route 2 west – Downtown HartfordHOV exit; Westbound exit and eastbound entrance
58.4494.0555 Route 2 east – Glastonbury
58.4494.0556Governor St. – Downtown East HartfordConnection is SR 500
59.3895.5657 Route 15 south – Wethersfield, NewingtonWestbound exit and eastbound entrance.
59.8196.2558Roberts Street (SR 518), Silver Lane (SR 502) – E. HartfordHOV exit to Silver Lane westbound
62.1399.9959 I-384 east – Bolton, WillimanticHOV exit to I-384 eastbound
Manchester62.88101.2060 US 6 east / US 44 (W. Middle Turnpike, Burnside Ave.) – Manchester, East HartfordEast end of US 6 overlap; westbound exit combined with exit 62
63.38102.0061 I-291 west – South Windsor, Windsor
64.56103.9062Buckland St. – S. Windsor, ManchesterHOV exit
66.25106.6263 Route 30 / Route 83 – Manchester, South Windsor
Vernon67.63108.8464 Route 30 / Route 83 – Vernon, Rockville, TalcottvilleHOV exit; Eastbound exit 65 leaves I-84 on the same ramp as exit 64
68.54110.3065 Route 30 – Vernon CenterHOV exit; Eastbound exit is combined with exit 64
69.63112.0666Tunnel Road – Vernon, Bolton
71.63115.2867 Route 31 – Rockville, Coventry
Tolland75.06120.8068 Route 195 – Tolland, Mansfield, Storrsaccess to the University of Connecticut
77.88125.3469 Route 74 – Willington, Tolland, Rockville
Willington79.44127.8570 Route 32 – Stafford Springs, Willington, Mansfield
81.50131.1671 Route 320 south (Ruby Rd.) – Willington
85.50137.6072 Route 89 – Stafford Springs, Westford, Ashford
Union86.81139.7173 Route 190 – Union, Stafford Springs
90.56145.7474 Route 171 south – Union
91.28146.90 I-84 east – BostonContinuation into Massachusetts
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
  •      Concurrency terminus
  •      Closed/Former
  •      HOV
  •      Incomplete access
  •      ETC only
  •      Unopened

Auxiliary route

I-384.svg I-384, a spur route into Manchester.


External links

Interstate 84
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New York
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