|Maintained by CTDOT|
|Length||116.33 mi (187.21 km)|
|West end||US 6 / US 202 in Southeast, NY|
| I-84 / US 7 / US 202 in Danbury|
I-84 / Route 67 in Southbury
Route 9 in Farmington
I-91 in Hartford
Route 15 in East Hartford
Route 2 in Hartford
I-84 / I-291 / I-384 / US 44 in Manchester
I-384 in Bolton
I-395 in Killingly
|East end||US 6 in Foster, RI|
|Counties||Fairfield, New Haven, Litchfield, Hartford, Tolland, Windham|
U.S. Route 6 (US 6) within the state of Connecticut runs for 116.33 miles (187.21 km) from the New York state line near Danbury to the Rhode Island state line in Killingly. West of Hartford, the route either closely parallels or runs along Interstate 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 and Providence.
US 6 enters Connecticut paired with US 202 from the town of Southeast, New York just east of the village of Brewster. The concurrency runs for 3.8 miles (6.1 km) through the city of Danbury as a minor arterial road before it forms a 3.3 miles (5.3 km) 4-way concurrency with I-84 and US 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 of Bethel and Newtown. In Newtown, it has a 2.8 miles (4.5 km) concurrency with Route 25 before turning east toward the village of Sandy Hook, where it enters I-84 once again for 6.4 miles (10.3 km) between Newtown and Southbury (from exits 10 to 15).
After exiting I-84 in Southbury, US 6 once again becomes a surface road, and is duplexed with Route 67 for 2.7 miles (4.3 km). It then passes through the northern Waterbury area suburbs of Woodbury, Watertown and Thomaston. US 6 has a 1.0-mile (1.6 km) overlap with the Route 8 expressway in Thomaston.
After leaving the Route 8 expressway, US 6 continues as an alternating 2- and 4-lane surface road through the towns of Plymouth, Bristol and Farmington. In Farmington, it once again joins I-84 at exit 38 for 13.4 miles (21.6 km), passing through West Hartford, Hartford, and East Hartford. US 44 joins for 0.25 miles (0.40 km) to cross the Connecticut River on the Bulkeley Bridge from Hartford to East Hartford towards Bolton just past the eastern terminus of I-384.
In Bolton, US 6 and US 44 split. US 44 follows a more northerly route while US 6 continues through Bolton, Coventry, Andover and Columbia. It intersects with Route 316 and Route 87 along the way, and mostly follows the Hop River.
The US 6 Willimantic Bypass begins in Columbia, at a four-way at-grade intersection with Route 66. The expressway starts out heading northeast and immediately crosses into Coventry. 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 expressway curves and heads east. At this point, the Hop River State Park Trail passes under both sides of the expressway. Soon after, the westbound lane also curves, and the two sides of the expressway soon become parallel again. The expressway then passes over Flanders River Road about 0.25 miles (0.40 km) east. The expressway then crosses the Willimantic River and enters the town of Windham. Right after entering Windham, it overpasses the New England Central Railroad. Immediately after this, there is an interchange with Route 32. After the interchange, the expressway enters Mansfield and passes under Mansfield Avenue before encountering another interchange for Route 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 expressway crosses the Natchaug River and once again enters Windham. 0.5 miles (0.80 km) after entering Windham, the US 6 Willimantic Bypass ends 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 of Chaplin, Hampton, and Brooklyn. In Killingly, US 6 becomes a two-lane freeway in the vicinity of its junction with I-395 in Killingly, part of which (0.34 miles (0.55 km)) is duplexed with Route 12. Just before the Rhode Island state line, the unsigned portion of the Connecticut Turnpike (SR 695) merges into US 6 eastbound as it enters the town of Foster
Before the creation of the U.S. Highway system in 1926, most of the proposed routing in Connecticut was part of New England Interstate Route 3 (NE-3). There were two places where NE-3 and US 6 were not overlapped. NE-3 began in Bedford, New York at NY 22, entering Connecticut via modern Route 35. NE-3 continued north to Danbury via the old non-expressway alignment of U.S. Route 7. US 6, on the other hand, went east from Brewster on its current alignment, meeting with NE-3 in downtown Danbury.
Another difference in routing is between Manchester and Windham. US 6 originally used a more northern alignment via Coventry, running along present U.S. Route 44 then modern Route 31. NE-3 used current US 6 for its routing. East of Windham, the routes overlapped into Rhode Island. Between 1926 and 1932, NE-3 and US 6 were cosigned where they overlapped. NE-3 was finally deleted in 1932.
I-84 was to be an expressway that would connect the modern Interstate 384 with the modern U.S. Route 6 Willimantic Bypass. From here, I-84 would continue to Providence. This idea was planned in the 1960s, but abandoned in 2005.
The Connecticut Department of Transportation (ConnDOT) 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 the Hop 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, ConnDOT and the Connecticut Department of Environmental Protection favored a northern alignment (Alternative 133B), which would avoid the town centers and nearby wetlands. The Environmental Protection Agency, Army Corps of Engineers, and Federal 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 ConnDOT, the Connecticut DEP, and affected towns, the FHWA issued a Record of Decision and the Army Corps of Engineers issued required permits for Alternative 133 18/25 (southern alignment) in 2001. State and local officials continued to press the Corps of Engineers 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 ConnDOT removed the US 6 bypass from planning, hence ConnDOT effectively abandoned further study of the bypass in lieu of upgrading the existing road.
In 2007, ConnDOT began making safety improvements and capacity upgrades to the existing US 6 through Andover, Bolton, and Columbia.
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 along Route 64 to downtown Waterbury then along Route 10 to Farmington.
- Woodbury-Willimantic: West of Meriden, this was the original alignment of US 6. When US 6 was reassigned to the former 6A from Plymouth-Farmington, this became 6A. This 6A was subsequently extended through Meriden to Willimantic along modern Route 66. An expressway upgrade was planned for this 6A. Only a portion of the highway was built and is now Interstate 691. Between Woodbury and Waterbury this section is now CT Route 64.
- Coventry-Windham: became 6A when NE-3 was deleted. Swapped with the old US 6 in 1939 and finally deleted in 1942 when 6A became Route 31.
- Danielson: old routing prior to construction of the 2-lane freeway
Exit numbers are signed throughout the route's overlap with I-84.
|Fairfield||Danbury||0.00||0.00||US 6 / US 202 west||Continuation into New York|
|0.04||0.064||Saw Mill Road to I-84 – Newburgh, Waterbury||Exit 1 on I-84|
|1.03||1.66||Milestone Road to I-84 – Newburgh, Waterbury||Exit 2 on I-84|
|1.10||1.77||Old Ridgebury Road to I-84 east – Waterbury||Exit 2A on I-84|
|4.15||6.68||4||I-84 west / US 7 south – Newburgh, Norwalk||Western end of I-84 / US 7 concurrency; westbound exit and eastbound entrance to/from US 7|
|5.61||9.03||5||Route 37 / Route 39 / Route 53 – Downtown Danbury, Bethel|
|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|
|8.26||13.29||8||I-84 east – Waterbury||Eastern end of I-84 concurrency|
|Town of Newtown||11.45||18.43||Route 25 north – Hawleyville, Brookfield, Bridgewater||Northern end of Route 25 concurrency|
|Borough of Newtown||14.26||22.95||Route 25 south – Bridgeport||Southern end of Route 25 concurrency|
|Town of Newtown||15.52||24.98||10||I-84 west – Danbury||Western end of I-84 concurrency|
|16.33||26.28||11||Route 34 east to Route 25 – Derby, New Haven, Bridgeport||Access via SSR 490|
|New Haven||Southbury||18.93||30.46||13||River Road||Eastbound exit and westbound entrance|
|20.40||32.83||14||Route 172 north – South Britain|
|15||I-84 east / Route 67 south – Waterbury, Southford, Oxford, Seymour, New Haven||Eastern end of I-84 overlap; western end of Route 67 concurrency|
|23.76||38.24||Route 67 north (Roxbury Road)||Northern end of Route 67 concurrency|
|Litchfield||Woodbury||25.94||41.75||Route 64 east – Middlebury, Waterbury||Western end of Route 64|
|26.90||43.29||Route 317 west – Roxbury||Eastern end of Route 317|
|27.60||44.42||Route 47 north – Hotchkissville, Washington||Southern end of Route 47|
|31.48||50.66||Route 61 north – Bethlehem|
|Watertown||34.57||55.64||Route 63 – East Morris, Waterbury|
|35.81||57.63||Route 262 north – Oakville||Southern end of Route 262|
|Thomaston||38.61||62.14||Route 109 west – Morris||East end of Route 109|
|39.12||62.96||Route 254 north – Thomaston||South end of Route 254|
|39.40||63.41||Route 8 south – Waterbury||Southern end of Route 8 concurrency; Exit 38 on Route 8|
|40.39||65.00||Route 8 north – Torrington||Northern end of Route 8 concurrency; Exit 39 on Route 8|
|40.61||65.36||Route 222 north – Thomaston||South end of Route 222|
|Plymouth||41.28||66.43||Route 262 south – Airport||North end of Route 262|
|44.15||71.05||Route 72 – Harwinton, Bristol|
|Hartford||Bristol||46.86||75.41||Route 69 south – Wolcott||Southern end of Route 69 concurrency|
|47.25||76.04||Route 69 north – Burlington||Northern end of Route 69 concurrency|
|48.30||77.73||Route 229 south – Southington, Theme Park||Northern end of Route 229|
|Farmington||50.95||82.00||Route 177 – Plainville, Unionville|
|53.09||85.44||Route 10 to I-84 west – Plainville, Waterbury||Grade-separated interchange; access via Scott Swamp Road|
|55.15||88.76||Fienemann Road east to I-84||To Exit 37 on I-84|
|38||I-84 east – Hartford||Western end of I-84 concurrency; westbound exit and eastbound entrance|
|56.21||90.46||39||Route 4 – Farmington||Westbound exit and eastbound entrance via SR 508|
|39A||Route 9 south – Newington, New Britain||Northern terminus of Route 9|
|West Hartford||58.19||93.65||40||Route 71 (New Britain Avenue) – Corbins Corner|
|59.15||95.19||41||South Main Street – Elmwood|
|59.97||96.51||42||Trout Brook Drive – Elmwood||Westbound exit and eastbound entrance|
|43||Park Road – West Hartford Center||Access via SR 501|
|61.09||98.31||44||Prospect Avenue / Oakwood Avenue|
|Hartford||61.85||99.54||45||Flatbush Avenue||Westbound exit and eastbound entrance via SR 504|
|46||Sisson Avenue||Access via SR 503|
|62.96||101.32||47||Sigourney Street||Westbound exit and eastbound entrance|
|48A||Asylum Street||Signed as Exit 48 westbound|
|63.30||101.87||48B||Capitol Avenue||Eastbound exit and westbound entrance|
|63.91||102.85||49||Ann Uccello Street||Eastbound exit and westbound entrance; to XL Center|
|50||US 44 west (Main Street) to I-91 south – Downtown Hartford||Western terminus of US 44 concurrency; no eastbound signage for I-91 or US 44|
|51||I-91 north – Springfield, Bradley International Airport||Exits 32B (west) and 30 (east) on I-91 south|
|64.43||103.69||52||I-91 south – New Haven||Westbound access is via Exit 50|
|East Hartford||64.87||104.40||53||US 44 east (Connecticut Boulevard) / East River Drive – East Hartford||Eastern end of US 44 concurrency; no westbound exit|
|65.19||104.91||54||Route 2 west – Downtown Hartford||Westbound exit and eastbound entrance from Restricted Lanes|
|55||Route 2 east – Norwich, New London|
|65.29||105.07||–||I-84 east (Restricted Lanes) – Boston||Western terminus of I-84 Restricted Lanes|
|56||Governor Street – Downtown East Hartford||Access via SR 500|
|66.76||107.44||57||Route 15 south to I-91 – Charter Oak Bridge, New York City||Westbound exit and eastbound entrance|
|58||Roberts Street – Silver Lane (SR 502) – Burnside Avenue||Westbound exit from Restricted Lanes|
|68.35||110.00||59||I-384 east – Providence||Eastbound exit and westbound entrance from Restricted Lanes|
|60||I-84 east / US 44 west (Burnside Ave) – Boston, East Hartford||Eastern end of I-84 concurrency; western end of US 44 concurrency|
|72.67||116.95||Route 83 – Glastonbury, Vernon|
|Tolland||Bolton||75.83||122.04||Route 85 south – Bolton Center, Gay City State Park|
|76.62||123.31||I-384 west – Manchester, Hartford||Westbound exit and eastbound entrance|
|76.95||123.84||US 44 east – Coventry, Mansfield||Eastern end of US 44 concurrency|
|Andover||82.68||133.06||Route 316 south – Andover, Hebron||Northern end of Route 316|
|83.91||135.04||Route 87 south – Columbia, Norwich||Northern end of Route 87|
|Columbia||87.81||141.32||Route 66 – Columbia, Middletown, Willimantic|
|Windham||Windham||89.72||144.39||Route 32 – Stafford Springs, Willimantic||Grade-separated interchange|
|Tolland||Mansfield||91.94||147.96||Route 195 – Storrs, Univ. of Connecticut||Grade-separated interchange|
|Windham||Windham||93.15||149.91||Route 66 west – Willimantic||Eastern end of Route 66|
|95.00||152.89||Route 203 south – Windham Center||Northern end of Route 203|
|Chaplin||96.96||156.04||Route 198 north – Chaplin, Phoenixville, Woodstock, Putnam||Southern end of Route 198|
|Hampton||101.30||163.03||Route 97 – Pomfret, Scotland|
|Brooklyn||107.44||172.91||Route 169 – Pomfret, Canterbury|
|Killingly||110.96||178.57||Route 12 north – Danielson||Northern terminus of Route 12 concurrency|
|111.31||179.14||Route 12 south – Plainfield||Southern terminus of Route 12 concurrency|
|111.80||179.92||I-395 – Norwich, Worcester||Cloverleaf interchange; westbound access to I-395 south only at CT-RI border; Exits 37A-B on I-395 south and 37 on I-395 north|
|116.04||186.75||To I-395 south – Norwich||Westbound exit and eastbound entrance via unsigned Connecticut Turnpike|
|116.33||187.21||US 6 east||continuation into Rhode Island|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
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|U.S. Route 6|