Dwight D. Eisenhower National System of Interstate and Defense Highways
Standard Interstate Highway signs in Connecticut
All Interstate Highways in Connecticut
System information
Length	446.33 mi (718.30 km)
Notes	Interstate Highways inConnecticut maintained byConnDOT
Highway names
Interstates	Interstate X (I-X)
US Highways	U.S. Route X (US X)
State	Route X
System links
Connecticut State Highway System Interstate US State SSR SR Scenic

Interstate Highways in the U.S. state ofConnecticut run a total of 446.33 miles (718.30 km). Connecticut has threeprimary highways and fiveauxiliary highways. Most of the highways are maintained by theConnecticut Department of Transportation, with the exception ofInterstate 684, which is maintained by theNew York State Department of Transportation.^[1]

In 1957, Connecticut received approval for the routes of its three primaryInterstate highways: I-84, I-91, and I-95. This plan was extended in 1959 to include I-291 andI-491. The first Interstate Highway signs were installed on a completed section of I-91 north of Hartford in 1961. The primary interstates were all completed by 1969 after the last section of I-84 opened betweenFarmington andPlainville. The rest of the highways were built or renumbered to their current designations by 1994 when a five-mile section of I-291 opened 35 years behind schedule. Connecticut was one of the last states in the US to raise its maximum speed limit above the formerfederally mandated limit of 55 mph (89 km/h). The state raised its maximum to 65 mph (105 km/h) in 1998.^[2]

Though parts of the Interstate Highway System in Connecticut were previously tolled, all tolls were removed from Connecticut's highways by 1988.^[2][3]

Number	Length (mi)[1]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
I-82	—	—	I-84/US 6 inEast Hartford	I-82 at theRhode Island state line	01956-01-011956	01968-01-011968	Early designation for the extension of I-84 from East Hartford to Providence. Re-designated as I-84 in 1968. Completed sections around Manchester and Willimantic re-designated as I-384 and US 6, respectively, in 1984 when East Hartford-Providence I-84 extension was cancelled
I-84	97.90	157.55	I-84 at theNew York state line	I-84 at theMassachusetts state line	01969-01-011969	current	Eastward extension from Manchester to Rhode Island cancelled; completed section around Manchester renumbered as I-384. Willimantic Bypass section re-designated as US 6. I-84 realigned to follow former I-86/Route 15 routing (Wilbur Cross Highway) to I-90 in Massachusetts
I-84 BL	4.1	6.6	I-84/Route 25 inHawleyville	I-84/US 6/SR 816 inSandy Hook	01960-01-011960	01979-01-011979	Ran from what is today between exits 9 & 10 alongRoute 25 andUS 6
I-86	31.27	50.32	I-84/US 6 inEast Hartford	I-86 at theMassachusetts state line	01971-01-011971	01984-01-011984	Renumbered I-84 and Route 3
I-87	1.41	2.27	I-87 at theNew York state line	I-87 at the New York state line	01961-01-011961	01968-01-011968	Renumbered I-684
I-89	—	—	I-95 inNorwalk	I-89 at theMassachusetts state line	01956-01-011956	01970-02-161970	Proposed, but never completed, interstate route paralleling US-7 from Norwalk, CT to Canadian Border north of Burlington, VT. Completed freeway sections in Connecticut (through Norwalk, Danbury, and around Brookfield) designated asUS 7
I-91	58.00	93.34	I-95 inNew Haven	I-91 at theMassachusetts state line	01959-01-011959	current
I-95	111.57	179.55	I-95 at theNew York state line	I-95 at theRhode Island state line	01964-01-011964	current	Part of theConnecticut Turnpike from the New York state line at Greenwich to Waterford
I-284	—	—	I-84/US 6/Route 2 inEast Hartford	I-291 inSouth Windsor	01976-01-011976	01983-01-011983	Unbuilt due to environmental concerns, except of a short freeway stub that serve as ramps from I-84 to Governor Street
I-291	6.02	9.69	I-91/Route 218 inWindsor	I-84 inManchester	01994-01-011994	current	Partially completed Hartford Beltway (northeast quadrant). Northwest quadrant cancelled; southwest quadrant of I-291 completed as an extension of theRoute 9 freeway between I-91 in Berlin to I-84 in Farmington
I-384	8.53	13.73	I-84/US 6 inEast Hartford	US 6/US 44 inBolton	01984-01-011984	current	Designated as I-84 from its opening in 1971 to 1984
I-395	54.69	88.02	I-95 inEast Lyme	I-395 at theMassachusetts state line	01968-01-011968	current	Part of theConnecticut Turnpike from Waterford to Killingly; formerly designated as Route 52, and proposed as an extension to I-290. First highway (in 2015) in Connecticut to receive mile-based exits
I-484	—	—	I-84/US 6 inHartford	I-91 in Hartford	01968-01-011968	01983-01-011983	Became theConland–Whitehead Highway and unsigned SR 598
I-491	—	—	I-91 inWethersfield	I-84/US 6 inEast Hartford	01958-01-011958	01973-01-011973	Parts co-signed withI-86; re-designated asRoute 3
I-684	1.41	2.27	I-684 at theNew York state line	I-684 at the New York state line	01968-01-011968	current	No intersections with other roads in Connecticut; previously designated as I-87
I-691	8.92	14.36	I-84 inSouthington	I-91/Route 66 inMeriden	01976-01-011976	current	Formerly designated as US 6A, then Route 66
Former

• Connecticut portal
• U.S. Roads portal
• Connecticut Turnpike

Wikimedia Commons has media related toInterstate Highways in Connecticut.

• Connecticut Department of Transportation
• Connecticut Roads from Kurumi

• Interstate Highways in Connecticut
• Lists of roads in Connecticut
• Lists of Interstate Highways

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