List of U.S. Highways in Connecticut

United States Numbered Highway System
US Route markers
System information
Length	547.75 mi (881.52 km)
Notes	U.S. Highways in Connecticut maintained by ConnDOT
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

United States Numbered Highways in the U.S. state of Connecticut, are numbered by the American Association of State Highway and Transportation Officials (AASHTO) and maintained by the Connecticut Department of Transportation, a total of 547.75 miles (881.52 km) as a system of state highways and are numbered from 1 to 202.

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History

In 1926, the U.S. highway system was implemented. U.S. Routes 1, 5, 6, and 7, plus 202 were used as designations on several primary state highways, replacing New England routes 1, 2, 3, and 4, respectively. The other New England routes that were not re-designated as U.S. routes became ordinary state highways but kept their number designation, which are used even today (with some realignment).

Primary routes


Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US 1	117.37	188.89	US 1 in Port Chester, NY	US 1 in Westerly, RI	01926-01-011926	current	Mostly follows the old New England Route 1; functionally bypassed by I-95
US 5	54.59	87.85	I-91 in New Haven, CT	US 5 in Longmeadow, MA	01926-01-011926	current	Mostly follows the old New England Route 2; functionally bypassed by I-91
US 6	116.33	187.21	US 6/US 202 in Southeast, NY	US 6 in Foster, RI	01926-01-011926	current	Most of the proposed routing was part of old New England Route 3
US 7	78.29	126.00	I-95 in Norwalk	US 7 in Sheffield, MA	01926-01-011926	current	Mostly follows the old New England Route 4
US 44	106.03	170.64	US 44 in North East, NY	US 44 in Glocester, RI	01934-01-011934	current
US 202	75.14	120.93	US 6/US 202 in Southeast, NY	US 202/Route 10 in Southwick, MA	01935-01-011935	current
Former

Alternate and auxiliary routes


Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US 1A	1.93	3.11	US 1 in Stonington	US 1 in Stonington	01939-01-011939	current	Only remaining US alternate route in the state
US 1A	—	—	Greenwich	Milford	—	—	Planning number for the Merritt Parkway. No route number signs were erected until it became part of Route 15 in 1948.
US 1A	—	—	Stamford	Stamford	—	—
US 1A	—	—	Darien	Darien	01956-01-011956	—	Old section of US 1 when the freeway was built there; now part of US 1 and the freeway is part of I-95
US 1A	—	—	Norwalk	Norwalk	01950-01-01c. 1950	—	Cross Street
US 1A	—	—	Bridgeport	Stratford	01928-01-01c. 1928	01963-01-011963	Present-day US 1 (North St, Boston Rd, Barnum Ave) then Main St (part of today's Route 113) and E. Main St (part of today's Route 110)
US 1A	—	—	Milford	Milford	01920-01-01c. 1920	01940-01-01c. 1940	Boston Post Road, between Bridgeport Ave and Cherry St; now part of US 1
US 1A	—	—	East Haven	East Haven	01941-01-01c. 1941	01947-01-01c. 1947	Main Street when the Saltonstall Parkway part of US 1 opened; previously part of US 1.
US 1A	—	—	Branford, Connecticut	Branford, Connecticut	01934-01-01c. 1934	01963-01-011963	West Main St, Main St, and East Main St
US 1A	—	—	Old Saybrook	Old Saybrook	01938-01-01c. 1938	01952-01-01c. 1952	Oyster River Rd (now the diagonal part of US 1). US 1 used to follow Old Boston Post Road into town.
US 1A	—	—	East Lyme	New London	01943-01-011943	01977-01-011977	Created when new US 1 freeway (now I-95) opened in 1943; deleted when US 1 was returned there in 1977.
US 1A	—	—	Groton	Groton	01936-01-011936	01940-01-011940	New section of Long Hill Road (today's US 1). The contemporary US 1 followed Thames Street, Poquonnock Road, Tower Avenue and Runway Lane.
US 1A	—	—	Groton	Groton	01956-01-01c. 1956	—	Section of Bridge Street leading eastward from today's I-95 exit 85 to US 1
US 5A	—	—	Berlin Turnpike in Wethersfield	MA 159 in Suffield	01932-01-011932	01968-01-011968	Now Route 159
US 5A	—	—	East Hartford	Windsor	01940-01-011940	01945-01-011945	Originally US 5 before the four-lane US 5 opened to the east.
US 5A	—	—	Berlin	Berlin	01940-01-011940	01963-01-011963	Worthington Ridge Road, formerly part of US 5.
US 5A	—	—	Meriden	Wallingford	01932-01-011932	01963-01-011963	A 7-mile section including Old Colony Road.
US 5A	—	—	New Haven	New Haven	01932-01-011932	01940-01-011940	State Street south from today's Route 22; now part of US 5
US 5A	—	—	New Haven	North Haven	01950-01-01c. 1950	01966-01-011966	Middletown Avenue (today's Route 17) and Maple Avenue (today's Route 103); early US 5
US 6A	—	—	Newton	Southbury	01955-01-011955	01965-01-011965	US 6A was created when a new US 6/US 202 highway opened to the south (which is now part of I-84).
US 6A	—	—	Plymouth	Hartford	01932-01-011932	01942-01-011942	There have been several routes signed as US 6A in the state; no special routes currently exist.
US 6A	—	—	Woodbury	Willimantic	01941-01-011941	01967-01-011967	Also served Waterbury, Meriden and Middletown; in 1967, US 6A was broken into Routes 64, 322, and 66
US 6A	—	—	Coventry	Windham	01940-01-011940	01942-01-011942	When US 6 was moved to its current "Suicide 6" path, this route briefly was US 6A before becoming part of Route 31.
US 6A	—	—	Killingly	Killingly	01959-01-011959	01968-01-011968	Now the Danielson Pike (SR 607/SR 618), this northern loop out of Danielson was part of US 6
US 44A	22.43	36.10	US 44 in Manchester	US 44 in Ashford	01948-01-011948	01982-01-011982	When US 44 was relocated along a portion of the Wilbur Cross Highway, the former surface alignment became US 44A.
US 202A	1.23	1.98	US 202 in Danbury	US 202 in Danbury	01935-01-011935	01974-01-011974	Former number for Coal Pit Hill Road in Danbury^[1]
Former