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U.S. Route 6
Grand Army of the Republic Highway
US 6 highlighted in red
Route information
Maintained byCTDOT
Length	116.33 mi[1] (187.21 km)
Existed	1926–present
Major junctions
West end	US 6 /US 202 at theNew York state line
Major intersections	I-84 /US 7 inDanbury I-84 /Route 67 inSouthbury Route 8 /Route 254 inThomaston I-84 inFarmington Route 9 in Farmington I-91 /US 44 inHartford Route 2 inEast Hartford Route 15 in East Hartford I-384 in East Hartford I-84 /I-291 /US 44 inManchester I-384 inBolton Route 12 inKillingly I-395 in Killingly
East end	US 6 at theRhode Island state line
Location
Country	United States
State	Connecticut
Counties	Fairfield,New Haven,Litchfield,Hartford,Tolland,Windham
Highway system
United States Numbered Highway System List Special Divided Connecticut State Highway System Interstate US State SSR SR Scenic
←US 5 →US 7

U.S. Route 6 (US 6) within the state ofConnecticut runs for 116.33 miles (187.21 km) from theNew York state line nearDanbury to theRhode Island state line inKillingly. West ofHartford, the route either closely parallels or runs alongInterstate 84 (I-84), which has largely supplanted US 6 as a through route in western Connecticut. East of Hartford, US 6 serves as a primary route for travel between Hartford andProvidence.

US 6 enters Connecticut paired withUS 202 from the town ofSoutheast, New York, just east of the village ofBrewster. Theconcurrency runs for 3.8 miles (6.1 km) through the city ofDanbury as a minor arterial road before it forms a 3.3-mile (5.3 km) four-way concurrency withI-84 andUS 7 from I-84 exit 4 to exit 7. At exit 7, US 7 and US 202 split to the north, while US 6 stays duplexed with I-84 for another 0.8 miles (1.3 km) before returning to surface roads at exit 8. The route then goes through the towns ofBethel andNewtown. In Newtown, it has a 2.8-mile (4.5 km) concurrency withRoute 25 before turning east toward the village ofSandy Hook, where it enters I-84 once again for 6.4 miles (10.3 km) between Newtown andSouthbury (from exits 10 to 15).

After exiting I-84 in Southbury, US 6 once again becomes a surface road and is duplexed withRoute 67 for 2.7 miles (4.3 km). It then passes through the northernWaterbury area suburbs ofWoodbury,Watertown, andThomaston. US 6 has a one-mile (1.6 km) overlap with theRoute 8freeway in Thomaston.

After leaving the Route 8 freeway, US 6 continues as an alternating two- and four-lane surface road through the towns ofPlymouth,Bristol, andFarmington. In Farmington, it once again joins I-84 at exit 38 for 13.4 miles (21.6 km), passing throughWest Hartford,Hartford, andEast Hartford.US 44 joins for 0.25 miles (0.40 km) to cross theConnecticut River on theBulkeley Bridge from Hartford to East Hartford towardBolton just past the eastern terminus ofI-384.

In Bolton, US 6 and US 44 split. US 44 follows a more northerly route while US 6 continues through Bolton,Coventry,Andover, andColumbia. It intersects withRoute 316 andRoute 87 along the way and mostly follows theHop River.

The US 6 Willimantic bypass begins inColumbia, at a four-way at-grade intersection withRoute 66. The freeway starts out heading northeast and immediately crosses intoCoventry. After crossing the town line, the eastbound and westbound sides of US 6 split, with a hill in between them. At the split, the eastbound side of the freeway curves and heads east. At this point,Hop River State Park Trail passes under both sides of the freeway. Soon after, the westbound lane also curves, and the two sides of the freeway soon become parallel again. The freeway then passes over Flanders River Road about 0.25 miles (0.40 km) east. The freeway then crosses theWillimantic River and enters the town ofWindham. Right after entering Windham, it overpasses theNew England Central Railroad. Immediately after this, there is an interchange withRoute 32. After the interchange, the freeway entersMansfield and passes under Mansfield Avenue before encountering another interchange forRoute 195. The eastbound exit and westbound entrance use Mansfield City Road, while the westbound exit accesses Route 195 via North Frontage Road and eastbound access to US 6 is from Route 195 itself. Soon after the eastbound entrance ramp joins US 6, the freeway crosses theNatchaug River and once again entersWindham. The US 6 Willimantic bypass ends 0.5 miles (0.80 km) after entering Windham at an interchange with the eastern end of Route 66, whose roadway US 6 assumes east of the interchange. US 6 then continues as a surface road through the towns ofChaplin,Hampton, andBrooklyn. InKillingly, US 6 becomes anexpressway in the vicinity of its junction withI-395 in Killingly, part of which (0.34 mi or 0.55 km) is duplexed withRoute 12, before reverting to a two-lane surface road. Just before theRhode Island state line,SR 695, the unsigned portion of theConnecticut Turnpike, merges into US 6 eastbound as it enters the town ofFoster.

Before the creation of theU.S. Numbered Highway System in 1926, most of the proposed routing in Connecticut was part ofNew England Route 3 (Route 3). There were two places where Route 3 and US 6 were not overlapped. Route 3 began inBedford, New York, atNew York State Route 22, entering Connecticut via modernRoute 35. Route 3 continued north to Danbury via the old non-expressway alignment ofUS 7. US 6, on the other hand, went east fromBrewster on its current alignment, meeting with Route 3 in downtown Danbury.

Another difference in routing is between Manchester and Windham. US 6 originally used a more northern alignment viaCoventry, running along presentUS 44 then modernRoute 31. Route 3 used current US 6 for its routing. East of Windham, the routes overlapped into Rhode Island. Between 1926 and 1932, Route 3 and US 6 were cosigned where they overlapped. Route 3 was finally deleted in 1932.

I-84 was to be an expressway that would connect the modernI-384 with the modern US 6 Willimantic bypass. From here, I-84 would continue toProvidence, Rhode Island. This idea was planned in the 1960s but abandoned in 2005.

TheConnecticut Department of Transportation (CTDOT) had planned since the 1960s to upgrade the segment between Bolton and Columbia to an expressway, connecting I-384 to the existing expressway segment in Windham. However, this particular segment of US 6 passes through an environmentally sensitive area centered around theHop River. Construction had been planned to begin in the late 1980s, but federal, state, and local officials could not reach an agreement on a feasible route that avoided the Hop River wetlands and development within the towns of Andover, Bolton, Coventry, and Columbia. The affected towns, CTDOT, and theConnecticut Department of Environmental Protection (DEP) favored a northern alignment (Alternative 133B), which would avoid the town centers and nearby wetlands. TheEnvironmental Protection Agency,U.S. Army Corps of Engineers (USACE), andFederal Highway Administration (FHWA) favored a southerly alignment (Alternative 133 18/25) that would cut through residential and commercial areas as well as the Hop River's adjoining wetlands.

Despite opposition from CTDOT, DEP, and affected towns, the FHWA issued arecord of decision and USACE issued required permits for Alternative 133 18/25 (southern alignment) in 2001. State and local officials continued to press USACE to approve the northern alignment. Due to the impasse between state, local, and federal officials, federal funds for the bypass were withdrawn in 2003. In 2005, the Capitol Region Council of Governments and CTDOT removed the US 6 bypass from planning, hence CTDOT effectively abandoned further study of the bypass in lieu of upgrading the existing road.

In 2007, CTDOT began making safety improvements and capacity upgrades to the existing US 6 through Andover, Bolton, and Columbia.

County	Location	mi[1]	km	Old exit	New exit	Destinations	Notes
Fairfield	Danbury	0.00	0.00			US 6 west /US 202 west	Continuation intoNew York
		0.1	0.16			I-84 –Newburgh,Waterbury	Access via Saw Mill Road; exit 1 on I-84
		1.03	1.66			I-84 –Newburgh,Waterbury	Access viaSR 824; exit 2B on I-84
		4.15	6.68	Western end of freeway section
					4	I-84 west /US 7 south / Lake Avenue –Newburgh,Norwalk	Western end of I-84/US 7 concurrency; no eastbound access to US 7
		5.61	9.03		5	Route 37 north /Route 39 north /Route 53 south –Downtown Danbury,Bethel	Route 37 not signed westbound
		6.25	10.06		6	Route 37 –New Fairfield	Westbound exit and eastbound entrance
		7.97	12.83		7	US 7 north /US 202 east –Brookfield,New Milford	Eastern end of US 7/US 202 concurrency; exit 10 on US 7
		8.26	13.29		8	I-84 east / Newtown Road (SR 806 west) –Waterbury	Eastern end of I-84 concurrency
				Eastern end of freeway section
	Town of Newtown	11.45	18.43			Route 25 north –Hawleyville,Brookfield,Bridgewater	Western end of Route 25 concurrency
	Borough of Newtown	14.26	22.95			Route 25 south –Bridgeport	Eastern end of Route 25 concurrency
	Town of Newtown	15.52	24.98	Western end of freeway section
				10	15	I-84 west / Church Hill Road (SR 816 east) –Danbury	Western end of I-84 concurrency
		16.33	26.28	11	16	Route 34 toRoute 25 –Derby,New Haven,Bridgeport	Access viaSSR 490
New Haven	Southbury	18.93	30.46	13	18	River Road	Eastbound exit and westbound entrance
		20.40	32.83	14	20	Route 172 north –South Britain	Southern terminus of Route 172
		22.19	35.71	15	21	I-84 east /Route 67 south / Kettletown Road (SSR 487 south) –Waterbury,Southford,Oxford,Seymour,New Haven	Eastern end of I-84 concurrency; western end of Route 67 concurrency
				Eastern end of freeway section
		23.76	38.24			Route 67 north (Roxbury Road)	Eastern end of Route 67 concurrency
Litchfield	Woodbury	25.94	41.75			Route 64 east –Middlebury,Waterbury	Western terminus of Route 64
		26.90	43.29			Route 317 west –Roxbury	Eastern terminus of Route 317
		27.60	44.42			Route 47 north –Hotchkissville,Washington	Southern terminus of Route 47
		31.48	50.66			Route 61 north –Bethlehem	Southern terminus of Route 61
	Watertown	34.52	55.55			ToRoute 63 south –Waterbury	Access viaSR 838
		34.57	55.64			Route 63 –East Morris,Waterbury
		35.81	57.63			Route 262 north –Oakville	Southern terminus of Route 262
	Thomaston	38.61	62.14			Route 109 west / Watertown Road (SR 810 east) –Morris	Eastern terminus of Route 109
		39.40	63.41	Western end of freeway section
					38	Route 8 south /Route 254 north / Watertown Road (SR 810 west) / Waterbury Road (SR 848 south) –Waterbury,Litchfield	Western end of Route 8 concurrency; southern terminus of Route 254
		40.61	65.36		39	Route 8 north /Route 222 north –Torrington,Harwinton	Eastern end of Route 8 concurrency; southern terminus of Route 222
				Eastern end of freeway section
	Plymouth	41.28	66.43			Route 262 south –Airport	Northern terminus of Route 262
		44.15	71.05			Route 72 –Harwinton,Bristol
Hartford	Bristol	46.86	75.41			Route 69 south –Wolcott	Western end of Route 69 concurrency
		47.25	76.04			Route 69 north –Burlington	Eastern end of Route 69 concurrency
		48.30	77.73			Route 229 south –Southington,Theme Park	Northern terminus of Route 229
	Farmington	50.95	82.00			Route 177 –Plainville,Unionville
		52.67	84.76			ToI-84 west /Route 10 –Plainville,Waterbury	Access viaSR 552
		55.13	88.72			Birdseye Road (SR 549 north) toI-84 west –Waterbury	Access to I-84 via Fienemann Road
		55.92	89.99			Colt Highway (SR 531)
				Western end of freeway section
				38	54A	I-84 east –Hartford	Western end of I-84 concurrency; westbound exit and eastbound entrance
		56.34	90.67	39	54B	ToRoute 4 –Farmington	Westbound exit and eastbound entrance; access viaSR 508
		56.91– 57.92	91.59– 93.21	39A	55	Route 9 south –Newington,New Britain	Northern terminus and exits 40A-B on Route 9
	West Hartford	58.19	93.65	40	56	Route 71 (New Britain Avenue) –Corbins Corner
		59.15	95.19	41	57	South Main Street (Route 173 south) –Elmwood
		59.97	96.51	42	58A	Trout Brook Drive –Elmwood	Westbound exit and eastbound entrance
		59.87– 60.32	96.35– 97.08	43	58B	Park Road –West Hartford Center	Access viaSR 501
		61.09	98.31	44	59A	Prospect Avenue to Oakwood Avenue	Access via Caya Avenue/Kane Street
	Hartford	61.85	99.54	45	59B	To Flatbush Avenue	Westbound exit and eastbound entrance; access viaSR 504
		62.37– 62.71	100.37– 100.92	46	60	Sisson Avenue	Access viaSR 503
		62.96	101.32	47	61A	Sigourney Street	Westbound exit and eastbound entrance
		63.30– 63.69	101.87– 102.50	48A	61A	Asylum Street	Signed as exit 61B westbound
		63.30	101.87	48B	61A	Capitol Avenue	Eastbound exit and westbound entrance
		63.91	102.85	49	61B	Ann Uccello Street	Eastbound exit and westbound entrance; toXL Center
		63.96– 64.55	102.93– 103.88	50	62A	I-91 south /US 44 west (Main Street) –Downtown Hartford,New Haven	Western end of US 44 concurrency; I-91/US 44 not signed eastbound; exit 38B on I-91
				51-52	62B-C	I-91 –New Haven,Springfield,Bradley International Airport	Signed as exits 62B (north) and 62C (south); no westbound access to I-91 south; exits 38A-C on I-91
	Connecticut River	64.50– 64.74	103.80– 104.19	Bulkeley Bridge
	East Hartford	64.87	104.40	53	63A	US 44 east (Connecticut Boulevard) / East River Drive –East Hartford	Eastern end of US 44 concurrency; no westbound exit
		65.10– 65.41	104.77– 105.27	54-55	63A-B	Route 2 –Norwich,New London,Downtown Hartford	Signed as exits 63A (west) and 63B (east); no eastbound access to Route 2 west; Route 2 west not signed
				56	63C	Governor Street –Downtown East Hartford	Access viaSR 500
				–	–	I-84 east (Restricted Lanes) –Boston	Western terminus of I-84 Restricted Lanes
		66.56	107.12	57	64A	Route 15 south (Wilbur Cross Highway) toI-91 south –Charter Oak Bridge,New York City	Westbound exit and eastbound entrance
		67.13	108.04	58	64B	Roberts Street (SR 518) / Silver Lane (SR 502) to Burnside Avenue (US 44)	Westbound exit to Silver Lane from Restricted Lanes
		68.35	110.00	59	67	I-384 east –Providence	Western terminus and exit 1A on I-384; former routing of I-84
	Manchester	70.09	112.80	60	68	I-84 east /US 44 west (Middle Turnpike West) toI-291 west –Boston,East Hartford,Windsor	Eastern end of I-84 concurrency; western end of US 44 concurrency; no westbound access to I-291
				Eastern end of freeway section
		71.93	115.76			West Center Street (SR 502 west)
		72.67	116.95			Route 83 –Glastonbury,Vernon
Tolland	Bolton	75.83	122.04			Route 85 south / Cidermill Road (SR 533 north) –Bolton Center,Gay City State Park	Northern terminus of Route 85
		76.62	123.31			I-384 west –Manchester,Hartford	Interchange; westbound exit and eastbound entrance; eastern terminus of I-384; formerI-84
		76.95	123.84			US 44 east –Coventry,Mansfield	Interchange; eastbound exit and westbound entrance; eastern end of US 44 concurrency
	Andover	82.68	133.06			Route 316 south –Andover,Hebron	Northern terminus of Route 316
		83.91	135.04			Route 87 south –Columbia,Norwich	Northern terminus of Route 87
	Columbia	87.81	141.32			Route 66 –Columbia,Middletown,Willimantic
				Western end of freeway section
Windham	Windham	89.72	144.39		89	Route 32 –Stafford Springs,Willimantic
Tolland	Mansfield	91.94	147.96		91	Route 195 –Storrs,Univ. of Connecticut
Windham	Windham	93.15	149.91	Eastern end of freeway section
						Route 66 west –Willimantic	Eastern terminus of Route 66
		95.00	152.89			Route 203 south –Windham Center	Northern terminus of Route 203
	Chaplin	96.96	156.04			Route 198 north –Chaplin,Phoenixville,Woodstock,Putnam	Southern terminus of Route 198
	Hampton	101.30	163.03			Route 97 –Pomfret,Scotland
	Brooklyn	107.44	172.91			Route 169 –Pomfret,Canterbury
	Killingly			Western end of limited-access section
		110.96	178.57	–	–	Route 12 north –Danielson	At-grade intersection; western end of Route 12 concurrency
		111.31	179.14	–	–	Route 12 south –Plainfield	At-grade intersection; eastern end of Route 12 concurrency
		111.80	179.92	–	–	I-395 –Norwich,Worcester	Cloverleaf interchange; no westbound access to I-395 south; exits 37A-B on I-395; formerRoute 52
				Eastern end of limited-access section
						South Frontage Road to Westcott Road (SR 607 west)	Interchange; eastbound exit only
						Westcott Road (SR 607 west) –Danielson	Interchange; no eastbound exit
						Snake Meadow Road (SR 664 south) –Moosup
		116.04	186.75			ToI-395 south –Norwich	Interchange; westbound exit and eastbound entrance; access viaSR 695
		116.33	187.21			US 6 east –Providence	Continuation intoRhode Island
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       HOV only       Incomplete access       Route transition

There have been several routes signed as US 6A in the state. No special routes currently exist.

• Newtown–Southbury: Original surface routing before creation of expressway later to become I-84; currently SR 816.
• Plymouth–Hartford: Now US 6. At this time, the old US 6 went alongRoute 64 to downtown Waterbury then alongRoute 10 to Farmington.
• Woodbury–Willimantic: West of Meriden, this was the original alignment of US 6. When US 6 was reassigned to the former US 6A from Plymouth to Farmington, this became US 6A. This US 6A was subsequently extended through Meriden to Willimantic along modern Route 66. An expressway upgrade was planned for this US 6A. Only a portion of the highway was built and is now I-691. Between Woodbury and Waterbury this section is now Route 64.
• Coventry–Windham: Became US 6A when Route 3 was deleted. Swapped with the old US 6 in 1939 and finally deleted in 1942 when US 6A became Route 31.
• Danielson: Old routing prior to construction of the two-lane freeway.

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U.S. Route 6
Previous state: New York	Connecticut	Next state: Rhode Island

• U.S. Route 6
• U.S. Highways in Connecticut
• Transportation in Hartford County, Connecticut
• Transportation in Tolland County, Connecticut
• Transportation in Litchfield County, Connecticut
• Transportation in Fairfield County, Connecticut
• Transportation in New Haven County, Connecticut
• Transportation in Windham County, Connecticut
• Transportation in Windham, Connecticut

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