List of state routes in Connecticut
{{Short description|None}}
{{Use mdy dates|date=January 2025}}
{{Infobox state highway system
|title=State Route System
| caption=Standard Connecticut route shields
| length_mi=3719
| state=Route X
| interstate=Interstate X (I-X)
| us=U.S. Route X (US X)
| notes=Routes are generally state-maintained. There is also a system of unsigned state highways known as state roads (SR) and special service roads (SSR).
State roads maintained by the CTDOT.
|links=CT
}}
The Connecticut Department of Transportation (CTDOT) maintains a system of state highways to serve the predominant flow of traffic between towns within Connecticut, and to towns in surrounding states. State highways also include roads that provide access to federal and state facilities (Special Service Roads).
The state highway system consists of roads indicated on the official CTDOT map and highway log. As of January 1, 2007, the state highway system contains a total of {{convert|3719|mi|km}} of roads (not including ramps and interchange connections), corresponding to approximately 20% of all roads in the state. All state highways are state-maintained except for several segments (totaling 4 miles) that are locally maintained. Interstate highways and U.S. highways in the state are not Connecticut state routes, however they are maintained by the state.
All state highways are given a number designation. All state highways are assigned Route numbers. Route numbers are in the 2–999 range. State highways that are special service roads are assigned SSR numbers and are unsigned; these numbers are above 399 and are used for internal CTDOT purposes. Signposted state highways that are not U.S. highways or interstates are signed with the square Connecticut state highway shield.
State routes
Routes are signed state highways and are assigned numbers from 1 to 399 (with the exception of I-684 and I-691). All state, U.S. and Interstate highways are part of the same numbering system. In 1926, the U.S. highway system was implemented. U.S. Routes 1, 5, 6, and 7 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). In 1958, Connecticut received approval for the route numbers of its three primary Interstate highways: I-84, I-91, and I-95. State highways with the same number designation as the Interstate highways were renumbered to avoid duplication of route numbers.
{{routelist row
|state=CT
|type=CT
|route=2
|length_mi=58.03
|terminus_a=Columbus Boulevard/State Street in Hartford
|terminus_b=US 1 in Stonington
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=2A
|length_mi=9.91
|terminus_a=I-395/Route 2/Route 32 in Norwich
|terminus_b=Route 2 in Preston
|established=1967
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=3
|length_mi=14.48
|terminus_a=Route 66 in Middletown
|terminus_b=Route 2 in East Hartford
|established=1941
|notes=Extended in 1991
}}
{{routelist row
|state=CT
|type=CT
|route=4
|length_mi=46.72
|terminus_a=Route 41/Route 343 in Sharon
|terminus_b=Farmington Avenue in West Hartford
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=8
|length_mi=67.36
|terminus_a=I-95 in Bridgeport
|terminus_b=Route 8 at the Massachusetts state line
|established=1922
|notes=Rerouted in 1951
}}
{{routelist row
|state=CT
|type=CT 1956
|route=8A
|length_mi=1.31
|terminus_b=Route 8 in Stratford
|established=1932
|decommissioned=1951
|notes=Now Route 110
}}
{{routelist row
|state=CT
|type=CT
|route=9
|length_mi=40.89
|terminus_a=I-95/US 1 in Old Saybrook
|terminus_b=I-84/US 6 in Farmington
|established=1932
|established_ref={{cite news |title=Road Conditions in Connecticut |url=https://www.newspapers.com/clip/41032503/ct_renumber_august_6_1932/ |access-date=December 24, 2019 |work=The Hartford Daily Courant |date=August 6, 1932 |page=13|via=Newspapers.com}} {{open access}}
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=9A
|length_mi=15.4
|terminus_b=Route 9 in Middletown
|established=1968
|decommissioned=1986
|notes=Now Route 154
}}
{{routelist row
|state=CT
|type=CT
|route=10
|length_mi=54.28
|terminus_b=US 202/Route 10 at the Massachusetts state line
|established=1922
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1963
|route=10A
|length_mi=3.62
|terminus_a=Whitney Avenue in New Haven
|terminus_b=Route 10 in Hamden
|established=1932
|decommissioned=1970
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=11
|length_mi=7.42
|terminus_b=Route 2 in Colchester
|notes=Length includes only completed portion
|established=July 1971
|
}}
{{routelist row
|state=CT
|type=CT
|route=12
|length_mi=54.46
|terminus_a=I-95/US 1/Route 184 in Groton
|terminus_b=Route 12 at the Massachusetts state line
|established=1922
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=14
|length_mi=24.33
|terminus_a=Route 66/Route 195 in Windham
|terminus_b=Route 14 at the Rhode Island state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=14A
|length_mi=10.27
|terminus_a=Route 14 in Plainfield
|terminus_b=Route 14 in Sterling
|established=1963
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=15
|length_mi=83.53
|terminus_a=Hutchinson River Parkway at the New York state line
|terminus_b=I-84/US 6 in East Hartford
|notes=Includes Merritt Parkway, Wilbur Cross Parkway, Berlin Turnpike, and Wilbur Cross Highway; relocated in 1948
|established=1932
}}
{{routelist row
|state=CT
|type=CT 1926
|route=15A
|length_mi=3.02
|terminus_a=US 6A/Route 15 in Portland
|terminus_b=Route 15 in Portland
|established=1932
|decommissioned=1948
|notes=Now Route 17A
}}
{{routelist row
|state=CT
|type=CT
|route=16
|length_mi=17.05
|terminus_a=Route 66 in East Hampton
|terminus_b=Route 207 in Lebanon
|established=1934
|notes=Extended in 1963
}}
{{routelist row
|state=CT
|type=CT 1956
|route=16A
|length_mi=
|terminus_a=
|terminus_b=
|established=1942
|decommissioned=1963
|notes=ㅤ
}}
{{routelist row
|state=CT
|type=CT
|route=17
|length_mi=36.41
|terminus_a=I-91/Route 80/Middletown Avenue in New Haven
|terminus_b=Route 2 in Glastonbury
|established=1948
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=17A
|length_mi=3.02
|terminus_a=Route 17/Route 66 in Portland
|terminus_b=Route 17 in Portland
|established=1948
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1948
|route=18
|length_mi=2.23
|terminus_a=Route 72 in Cromwell
|terminus_b=Route 9 in Cromwell
|established=1940
|decommissioned=1951
|notes=Now Route 372
}}
{{routelist row
|state=CT
|type=CT
|route=19
|length_mi=6.99
|terminus_a=Route 190 in Stafford
|terminus_b=Route 19 at the Massachusetts state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=20
|length_mi=31.56
|terminus_a=Route 8 in Winchester
|terminus_b=I-91 in Windsor Locks
|notes=Includes part of Bradley Airport Connector
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=21
|length_mi=5.67
|terminus_a=Route 12 in Killingly
|terminus_b=Route 193 in Thompson
|established=1944
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=22
|length_mi=14.07
|terminus_a=Route 10/Route 40 in Hamden
|established=1951
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=25
|length_mi=28.59
|terminus_a=I-95 in Bridgeport
|terminus_b=US 202 in Brookfield
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1926
|route=25A
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|decommissioned=1933
|notes=Now part of Route 25
}}
{{routelist row
|state=CT
|type=CT
|route=27
|length_mi=3.21
|terminus_a=US 1 in Stonington
|terminus_b=Route 184 in Groton
|established=1950
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1963
|route=29
|length_mi=9.41
|terminus_b=Westchester Avenue at the New York state line
|established=1932
|decommissioned=1966
|notes=Renumbered Route 124 to match New York
}}
{{routelist row
|state=CT
|type=CT
|route=30
|length_mi=20.94
|terminus_a=I-291/US 5 in South Windsor
|terminus_b=Route 190 in Stafford
|established=1943
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=31
|length_mi=14.34
|terminus_b=Route 74 in Vernon
|terminus_a=Route 32 in Mansfield
|established=1942
|notes=Extended in 1963
}}
{{routelist row
|state=CT
|type=CT
|route=32
|length_mi=54.88
|terminus_a=I-95/US 1/Eugene O'Neill Drive in New London
|terminus_b=Route 32 at the Massachusetts state line
|notes=Realigned in 1932
|established=1922
}}
{{routelist row
|state=CT
|type=CT
|route=33
|length_mi=14.41
|terminus_a=I-95/Route 136 in Westport
|terminus_b=Route 35 in Ridgefield
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=34
|length_mi=21.88
|terminus_a=Washington Avenue in Newtown
|terminus_b=Route 10 in New Haven
|established=1932
|notes=Removed from the Oak Street Connector in 2023
}}
{{routelist row
|state=CT
|type=CT
|route=35
|length_mi=5.66
|terminus_a=NY 35 at the New York state line
|terminus_b=US 7 in Ridgefield
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=35A
|length_mi=1.02
|terminus_a=West Lane at the New York state line
|terminus_b=Route 35 in Ridgefield
|established=1933
|decommissioned=1963
|notes=Replaced by unsigned SR 835
}}
{{routelist row
|state=CT
|type=CT
|route=37
|length_mi=18.66
|terminus_a=I-84/US 6/US 7/US 202/Route 39/Route 53 in Danbury
|terminus_b=US 7 in New Milford
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=39
|length_mi=22.76
|terminus_a=I-84/US 6/US 7/US 202/Route 37/Route 53 in Danbury
|terminus_b=Route 55 in Sherman
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=40
|length_mi=3.08
|terminus_a=I-91/Bailey Road in North Haven
|terminus_b=Route 10/Route 22 in Hamden
|established=1976
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=41
|length_mi=17.86
|terminus_a=CR 2 at the New York state line
|terminus_b=Route 41 at the Massachusetts state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=42
|length_mi=13.66
|terminus_a=Route 67 in Oxford
|terminus_b=Route 10 in Cheshire
|established=1963
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=43
|length_mi=5.06
|terminus_a=Route 4/Route 128 in Cornwall
|terminus_b=Route 63 in Cornwall
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=45
|length_mi=10.29
|terminus_a=US 202 in Washington
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=47
|length_mi=12.27
|terminus_b=US 202 in Washington
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1948
|route=49
|length_mi=17.96
|terminus_a=Route 4 in Torrington
|terminus_b=Norfolk Road at the Massachusetts state line
|established=1932
|decommissioned=1954
|notes=Replaced by extended Route 72; this road became Route 272 in 1963
}}
{{routelist row
|state=CT
|type=CT
|route=49
|length_mi=21.74
|terminus_a=Route 2 in Stonington
|terminus_b=Route 14A in Sterling
|established=1959
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=51
|length_mi=9.4
|terminus_a=Route 156 in Old Lyme
|terminus_b=I-95/US 1 in East Lyme
|established=1962
|decommissioned=1976
|notes=Former route of US 1, replaced by US 1 again when it was rerouted off of I-95
}}
{{routelist row
|state=CT
|type=CT
|route=52
|length_mi=54.69
|terminus_b=Route 52 at the Massachusetts state line
|established=1964
|decommissioned=1983
|notes=Replaced by I-395 when it was rerouted off of I-95
}}
{{routelist row
|state=CT
|type=CT
|route=53
|length_mi=23.57
|terminus_b=I-84/US 6/US 7/US 202/Route 37/Route 39 in Danbury
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=55
|length_mi=2.64
|terminus_a=NY 55 at the New York state line
|terminus_b=US 7 in New Milford
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=57
|length_mi=9.51
|terminus_a=Route 33 in Westport
|terminus_b=US 7 in Georgetown
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=58
|length_mi=18.58
|terminus_b=Route 302 in Bethel
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT 1926
|route=58A
|length_mi=1.23
|terminus_a=
|terminus_b=
|established=1932
|decommissioned=1935
|notes=Renumbered US 202A in 1935
}}
{{routelist row
|state=CT
|type=CT
|route=59
|length_mi=12.05
|terminus_a=US 1 in Bridgeport
|terminus_b=Route 25 in Monroe
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=61
|length_mi=9.16
|terminus_b=Route 63 in Morris
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=63
|length_mi=52.57
|terminus_a=Route 10 in New Haven
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=64
|length_mi=8.14
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1948
|route=65
|length_mi=9.66
|terminus_a=US 1 in Bridgeport
|terminus_b=Route 8 in Shelton
|established=1932
|decommissioned=1951
|notes=Redesignated as part of a rerouted Route 8 in 1951
}}
{{routelist row
|state=CT
|type=CT 1948
|route=65A
|length_mi=2.91
|terminus_a=Route 65 in Trumbull
|terminus_b=Route 65 in Shelton
|established=1944
|decommissioned=1951
|notes=Now Route 108
}}
{{routelist row
|state=CT
|type=CT
|route=66
|length_mi=38.38
|terminus_a=I-91/I-691 in Meriden
|established=1968
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=67
|length_mi=31.00
|terminus_b=US 7/US 202 in New Milford
|terminus_a=Route 63 in Woodbridge
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=67A
|length_mi=1.20
|terminus_a=Route 133 in Bridgewater
|terminus_b=Route 67 in Bridgewater
|established=1959
|decommissioned=1963
|notes=Replaced by unsigned SR 867
}}
{{routelist row
|state=CT
|type=CT
|route=68
|length_mi=22.09
|terminus_a=Route 63 in Naugatuck
|terminus_b=Route 17 in Durham
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=69
|length_mi=35.16
|terminus_a=Route 63 in New Haven
|terminus_b=Route 4 in Burlington
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=70
|length_mi=10.92
|terminus_b=Route 71 in Meriden
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=71
|length_mi=19.19
|terminus_a=US 5 in Wallingford
|terminus_b=Route 173 in West Hartford
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=71A
|length_mi=2.92
|terminus_a=Route 71 in Berlin
|terminus_b=Kensington Avenue in New Britain
|established=1978
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=72
|length_mi=20.05
|terminus_b=Route 9/Route 71/Route 174 in New Britain
|terminus_a=Route 4 in Harwinton
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=73
|length_mi=3.46
|terminus_a=Route 63 in Watertown
|terminus_b=Route 8 in Waterbury
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=74
|length_mi=22.21
|terminus_a=Route 194 in South Windsor
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=75
|length_mi=13.52
|terminus_a=Route 159/Route 305 in Windsor
|terminus_b=Route 75 at the Massachusetts state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1948
|route=76
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1951
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=77
|length_mi=13.85
|terminus_a=Route 146 in Guilford
|terminus_b=Route 17 in Durham
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=78
|length_mi=0.43
|terminus_a=Route 2 in Stonington
|terminus_b=Route 78 at the Rhode Island state line
|established=1979
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=79
|length_mi=14.34
|terminus_b=Route 17 in Durham
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=80
|length_mi=25.91
|terminus_a=I-91/Route 17 in New Haven
|terminus_b=Route 154 in Deep River
|established=1932
|established_ref={{cite news |title=Road Conditions in Connecticut |url=https://www.newspapers.com/clip/41031961/ct_route_numbers_july_9_1932/ |access-date=December 24, 2019 |work=The Hartford Daily Courant |date=July 9, 1932 |page=10|via=Newspapers.com}} {{open access}}
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=81
|length_mi=15.75
|terminus_b=Route 154 in Haddam
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=82
|length_mi=28.47
|terminus_a=Route 9 in Chester
|terminus_b=Route 2/Route 32 in Norwich
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=83
|length_mi=27.56
|terminus_a=New London Turnpike in Glastonbury
|terminus_b=Route 83 at the Massachusetts state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=84
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1959
|notes=Renumbered Route 95, and is now Route 184 because of I-84
}}
{{routelist row
|state=CT
|type=CT
|route=85
|length_mi=37.38
|terminus_a=US 1 in New London
|terminus_b=US 6/US 44 in Bolton
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1948
|route=86
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1951
|notes=Replaced by an extended Route 156
}}
{{routelist row
|state=CT
|type=CT
|route=87
|length_mi=16.62
|terminus_a=Route 32 in Franklin
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=89
|length_mi=16.25
|terminus_a=Route 195 in Mansfield
|terminus_b=Route 190 in Union
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=91
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|decommissioned=1959
|notes=Renumbered Route 171 to avoid confusion with I-91
}}
{{routelist row
|state=CT
|type=CT 1956
|route=93
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|decommissioned=1959
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=94
|length_mi=9.33
|terminus_a=Route 2 in Glastonbury
|terminus_b=Route 85 in Hebron
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=95
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|decommissioned=1959
|notes=Renumbered Route 49 because of I-95
}}
{{routelist row
|state=CT
|type=CT 1963
|route=95
|length_mi=
|terminus_a=
|terminus_b=
|established=1959
|decommissioned=1964
|notes=Renumbered Route 184
}}
{{routelist row
|state=CT
|type=CT 1956
|route=95A
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1959
|notes=Renumbered Route 14
}}
{{routelist row
|state=CT
|type=CT
|route=97
|length_mi=29.14
|terminus_a=Route 12 in Norwich
|terminus_b=US 44/Route 169 in Pomfret
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=99
|length_mi=10.64
|terminus_a=Route 9 in Cromwell
|terminus_b=US 5/Route 15/Wethersfield Avenue in Wethersfield
|established=1969
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=100
|length_mi=4.40
|terminus_a=US 1 in East Haven
|terminus_b=Route 80 in East Haven
|established=1935
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1926
|route=101
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1935
|notes=Replaced by US 44
}}
{{routelist row
|state=CT
|type=CT
|route=101
|length_mi=9.46
|terminus_b=Route 101 at the Rhode Island state line
|established=1935
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=102
|length_mi=3.45
|terminus_a=Route 35 in Ridgefield
|terminus_b=US 7 in Ridgefield
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=103
|length_mi=5.31
|terminus_a=Route 80 in New Haven
|terminus_b=US 5/Route 22 in North Haven
|established=1987
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=104
|length_mi=6.82
|terminus_a=Route 137 in Stamford
|terminus_b=Long Ridge Road at the New York state line
|established=1935
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=105
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1963
|notes=Now Route 190
}}
{{routelist row
|state=CT
|type=CT 1956
|route=106
|length_mi=
|terminus_a=Route 58 near Easton
|terminus_b=Route 59 near Easton
|decommissioned=1963
|notes=Center Street; decommissioned in exchange for creating the current Route 106
}}
{{routelist row
|state=CT
|type=CT
|route=106
|length_mi=14.37
|terminus_a=I-95/US 1 in Stamford
|terminus_b=Route 53 in Wilton
|established=1963
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=107
|length_mi=7.50
|terminus_a=US 7 in Georgetown
|terminus_b=Route 58 in Redding
|
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=108
|length_mi=11.05
|terminus_b=Route 110 in Shelton
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=109
|length_mi=20.93
|terminus_a=US 202 in New Milford
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=110
|length_mi=15.95
|terminus_a=I-95/US 1/Route 130 in Stratford
|terminus_b=Route 111 in Monroe
|established=1935
|notes=Extended in 1952
}}
{{routelist row
|state=CT
|type=CT
|route=111
|length_mi=11.71
|terminus_a=Route 15/Merritt Parkway in Trumbull
|terminus_b=Route 34 in Monroe
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=112
|length_mi=6.68
|terminus_a=US 44 in Salisbury
|terminus_b=US 7 in Salisbury
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=113
|length_mi=8.12
|terminus_a=I-95 at the Bridgeport–Stratford line
|terminus_b=Route 110 in Stratford
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=114
|length_mi=7.92
|terminus_b=Route 63 in Woodbridge
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=115
|length_mi=5.66
|terminus_b=Route 67 in Seymour
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1963
|route=116
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|decommissioned=1967
|notes=Renumbered Route 118 so that Route 116 could be reused to match New York
}}
{{routelist row
|state=CT
|type=CT
|route=116
|length_mi=4.24
|terminus_a=Route 35 in Ridgefield
|terminus_b=NY 116 at the New York state line
|notes=none
|established=1966
}}
{{routelist row
|state=CT
|type=CT
|route=117
|length_mi=11.32
|terminus_b=Route 2 in Preston
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT 1956
|route=118
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1962
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=118
|length_mi=7.48
|terminus_a=Route 63 in Litchfield
|terminus_b=Route 4 in Harwinton
|notes=Route 116 designation from 1932-1967
|established=1966
}}
{{routelist row
|state=CT
|type=CT 1956
|route=119
|length_mi=
|terminus_a=
|terminus_b=
|established=
|decommissioned=1963
|notes=Now Route 201
}}
{{routelist row
|state=CT
|type=CT
|route=120
|length_mi=3.11
|terminus_a=Route 322 in Southington
|terminus_b=Route 10 in Southington
|notes=none
|established=1932
}}
{{routelist row
|state=NY
|type=NY
|route=120A
|length_mi=4.6
|terminus_a=NY 120A at the New York state line
|terminus_b=NY 120A at the New York state line
|notes=King St, Greenwich ... parts in CT and other parts along NY/CT line
|established=1931
}}
{{routelist row
|state=CT
|type=CT
|route=121
|length_mi=5.66
|terminus_b=Route 34 in Orange
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=122
|length_mi=3.51
|terminus_a=I-95 in West Haven
|terminus_b=Route 63 in New Haven
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=123
|length_mi=8.37
|terminus_b=NY 123 at the New York state line
|notes=realigned in 1934
|established=1932
}}
{{routelist row
|state=CT
|type=CT 1956
|route=124
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1963
|notes=Demoted to SR 832 and SR 834
}}
{{routelist row
|state=CT
|type=CT
|route=124
|length_mi=9.41
|terminus_b=Westchester Avenue at the New York state line
|notes=none
|established=1966
}}
{{routelist row
|state=CT
|type=CT
|route=125
|length_mi=1.24
|terminus_a=Route 4 in Cornwall
|terminus_b=Route 128 in Cornwall
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=126
|length_mi=6.08
|terminus_a=Route 63 in Canaan
|terminus_b=US 44 in North Canaan
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=127
|length_mi=6.80
|terminus_a=I-95/Route 130 in Bridgeport
|terminus_b=Route 111 in Trumbull
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=128
|length_mi=4.03
|terminus_b=Route 4/Route 43 in Cornwall
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT 1956
|route=129
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1963
|notes=Now Route 130
}}
{{routelist row
|state=CT
|type=CT
|route=130
|length_mi=8.21
|terminus_b=I-95/US 1/Route 110 in Stratford
|notes=none
|established=1992
}}
{{routelist row
|state=CT
|type=CT 1926
|route=131
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1935
|notes=Renumbered Route 199 so that Route 131 could be used to match Massachusetts
}}
{{routelist row
|state=CT
|type=CT
|route=131
|length_mi=3.78
|terminus_a=Route 12 in Thompson
|terminus_b=Route 131 at the Massachusetts state line
|established=1935
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=132
|length_mi=10.97
|terminus_a=Route 47 in Woodbury
|terminus_b=Route 63 in Watertown
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=133
|length_mi=20.05
|terminus_a=US 202 in Brookfield
|terminus_b=Route 67 in Bridgewater
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT 1956
|route=134
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1963
|notes=Decommissioned in 1956, but restored in 1961; replaced by rerouted Route 109
}}
{{routelist row
|state=CT
|type=CT
|route=135
|length_mi=2.58
|terminus_a=I-95/US 1 in Fairfield
|terminus_b=Route 58 in Fairfield
|notes=none
|established=1953
}}
{{routelist row
|state=CT
|type=CT
|route=136
|length_mi=20.46
|terminus_b=Route 59 in Easton
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=137
|length_mi=9.33
|terminus_b=NY 137 at the New York state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=138
|length_mi=17.73
|terminus_a=Route 97 in Sprague
|terminus_b=Route 138 at the Rhode Island state line
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=139
|length_mi=2.38
|terminus_b=Route 22/Route 80 in North Branford
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1963
|route=139A
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1964
|notes=the last highway log to show this road was the 1948 highway log
}}
{{routelist row
|state=CT
|type=CT
|route=140
|length_mi=22.50
|terminus_a=Route 75 in Windsor Locks
|terminus_b=Route 32/Route 190 in Stafford
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1948
|route=141
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1951
|notes=Now Route 22
}}
{{routelist row
|state=CT
|type=CT
|route=142
|length_mi=4.27
|terminus_a=US 1 in East Haven
|terminus_b=US 1/Route 146 in Branford
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT 1956
|route=143
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1962
|notes=Now Route 146
}}
{{routelist row
|state=CT
|type=CT 1956
|route=144
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1962
|notes=Now Route 80
}}
{{routelist row
|state=CT
|type=CT
|route=145
|length_mi=9.91
|terminus_b=Route 148 in Chester
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=146
|length_mi=13.00
|terminus_a=US 1/Route 142 in Branford
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=147
|length_mi=5.09
|terminus_a=Route 17 in Durham
|terminus_b=Route 66 in Middlefield
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=148
|length_mi=16.35
|terminus_a=Route 79 in Killingworth
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=149
|length_mi=11.70
|terminus_a=Route 82 in East Haddam
|terminus_b=Route 2/Old Hartford Road in Colchester
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=150
|length_mi=9.04
|terminus_a=Route 22 in North Branford
|terminus_b=US 5 in Wallingford
|notes=Extended in 1962
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=151
|length_mi=10.77
|terminus_a=Route 82 in East Haddam
|terminus_b=Route 66 in East Hampton
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=152
|length_mi=3.31
|terminus_b=Route 34 in Orange
|established=1932
|established_ref={{cite news |title=Road Conditions in Connecticut |url=https://www.newspapers.com/clip/41026244/ct_renum_june_25_1932/ |access-date=December 24, 2019 |work=The Hartford Daily Courant |date=June 25, 1932 |page=18|via=Newspapers.com}} {{open access}}
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=153
|length_mi=5.27
|terminus_b=Route 9/Route 154 in Essex
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=154
|length_mi=28.24
|terminus_a=US 1 in Old Saybrook
|terminus_b=Route 9 in Higganum
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=155
|length_mi=2.22
|terminus_a=Route 17 in Middletown
|terminus_b=Route 9/Randolph Road in Middletown
|notes=none
|established=1933
}}
{{routelist row
|state=CT
|type=CT
|route=156
|length_mi=22.76
|terminus_a=Route 82 in East Haddam
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=156A
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1961
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=157
|length_mi=6.86
|terminus_a=Route 68 in Durham
|terminus_b=Route 66 in Middletown
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT 1948
|route=158
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1950
|notes=Now Route 122
}}
{{routelist row
|state=CT
|type=CT
|route=159
|length_mi=16.82
|terminus_a=Main Street at the Hartford–Windsor town line
|terminus_b=Route 159 at the Massachusetts state line
|established=1968
|notes=formerly US-5A
}}
{{routelist row
|state=CT
|type=CT
|route=160
|length_mi=7.36
|terminus_a=US 5/Route 15/Berlin Turnpike in Berlin
|terminus_b=Route 17 in Glastonbury
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=161
|length_mi=8.03
|terminus_a=Route 156 in East Lyme
|terminus_b=Route 85 in Montville
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=162
|length_mi=20.05
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=163
|length_mi=12.86
|terminus_a=Route 32 in Montville
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=164
|length_mi=7.83
|terminus_a=Route 2 in Preston
|terminus_b=Route 138 in Griswold
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=165
|length_mi=16.01
|terminus_a=Route 2 in Norwich
|terminus_b=Route 165 at the Rhode Island state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=166
|length_mi=1.62
|terminus_a=Route 153 in Westbrook
|terminus_b=US 1 in Old Saybrook
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=167
|length_mi=10.41
|terminus_a=Route 4 in Farmington
|terminus_b=US 202/Route 10 in Simsbury
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=168
|length_mi=7.93
|terminus_a=Route 168 at the Massachusetts state line
|terminus_b=Route 75 in Suffield
|established=1977
|notes=Former portion of Route 190 renumbered because of I-190 in Massachusetts
}}
{{routelist row
|state=CT
|type=CT
|route=169
|length_mi=38.25
|terminus_a=Route 2/Route 32 in Norwich
|terminus_b=Route 169 at the Massachusetts state line
|notes=none
|established=1959
}}
{{routelist row
|state=CT
|type=CT
|route=171
|length_mi=20.70
|terminus_b=US 44/Route 12 in Putnam
|established=1959
|established_ref={{cite news|title=State Highway Route Numbers to be Changed|url=https://www.newspapers.com/clip/19216227/ct_changes_september_25_1958/|access-date=December 24, 2019|work=The Naugatuck Daily News|date=September 25, 1958|page=9|via=Newspapers.com}} {{open access}}
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=172
|length_mi=4.45
|terminus_a=I-84/US 6 in Southbury
|terminus_b=Route 67 in Southbury
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=173
|length_mi=6.17
|terminus_a=US 5/Route 15/Berlin Turnpike in Newington
|terminus_b=I-84/US 6/South Main Street in West Hartford
|established=1932
|established_ref={{cite news |title=Road Conditions in Connecticut |url=https://www.newspapers.com/clip/41028659/ct_route_numbers_june_5_1932/ |access-date=December 24, 2019 |work=The Hartford Daily Courant |date=June 5, 1932 |page=29|via=Newspapers.com}} {{open access}}
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=174
|length_mi=3.18
|terminus_a=Route 9/Route 71/Route 72 in New Britain
|terminus_b=Route 176 in Newington
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=175
|length_mi=6.19
|terminus_a=Route 71 in New Britain
|terminus_b=Route 99 in Wethersfield
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=176
|length_mi=4.14
|terminus_a=US 5/Route 15/Berlin Turnpike in Newington
|terminus_b=Newington Avenue at the Newington–Hartford line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=177
|length_mi=12.57
|terminus_a=Route 10 in Plainville
|terminus_b=US 44/US 202 in Canton
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=178
|length_mi=6.89
|terminus_a=Route 185 in Bloomfield
|terminus_b=Route 159 in Windsor
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=179
|length_mi=16.50
|terminus_a=Route 4 in Burlington
|terminus_b=Route 20 in Hartland
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT 1926
|route=180
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1935
|notes=Proposed but never built, Now Route 68
}}
{{routelist row
|state=CT
|type=CT
|route=181
|length_mi=7.84
|terminus_a=US 44 in Barkhamsted
|terminus_b=Route 20 in Hartland
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=182
|length_mi=3.81
|terminus_b=Route 182A/Route 183 in Colebrook
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=182A
|length_mi=2.09
|terminus_a=Route 182 in Colebrook
|terminus_b=Route 182/Route 183 in Colebrook
|notes=none
|established=1941
}}
{{routelist row
|state=CT
|type=CT
|route=183
|length_mi=19.06
|terminus_a=Route 4 in Torrington
|terminus_b=Route 183 at the Massachusetts state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=184
|length_mi=15.66
|terminus_a=I-95/US 1/Route 12 in Groton
|terminus_b=I-95/Route 216 in North Stonington
|notes=none
|established=1964
}}
{{routelist row
|state=CT
|type=CT
|route=185
|length_mi=6.36
|terminus_a=US 202/Route 10 in Simsbury
|terminus_b=Route 189 in West Hartford
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=186
|length_mi=3.57
|terminus_a=Route 190 in Somers
|terminus_b=Route 186 at the Massachusetts state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=187
|length_mi=19.74
|terminus_b=Route 187 at the Massachusetts state line
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=188
|length_mi=15.92
|terminus_a=Route 34 in Seymour
|terminus_b=Route 63 in Middlebury
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=189
|length_mi=20.32
|terminus_b=Route 189 at the Massachusetts state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=190
|length_mi=28.27
|terminus_a=Route 75 in Suffield
|terminus_b=Route 171 in Union
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=191
|length_mi=9.30
|terminus_a=US 5 in East Windsor
|terminus_b=Route 190 in Enfield
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=192
|length_mi=3.49
|terminus_a=Route 190 in Enfield
|terminus_b=Route 192 at the Massachusetts state line
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=193
|length_mi=6.63
|terminus_a=Route 12 in Thompson
|terminus_b=Route 193 at the Massachusetts state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=194
|length_mi=3.67
|terminus_a=US 5 in South Windsor
|terminus_b=Route 30 in South Windsor
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=195
|length_mi=15.91
|terminus_a=Route 66 in Windham
|terminus_b=Route 74 in Tolland
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=196
|length_mi=5.38
|terminus_a=Route 151 in Haddam
|terminus_b=Route 66 in East Hampton
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=197
|length_mi=10.97
|terminus_a=Route 171 in Union
|terminus_b=Route 197 at the Massachusetts state line
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=198
|length_mi=19.22
|terminus_b=Route 198 at the Massachusetts state line
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1926
|route=199
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1935
|notes=Replaced by US 44
}}
{{routelist row
|state=CT
|type=CT
|route=199
|length_mi=4.62
|terminus_a=Route 67 in Roxbury
|terminus_b=Route 47 in Washington
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=200
|length_mi=1.87
|terminus_a=Route 12 in Thompson
|terminus_b=Route 193 in Thompson
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=201
|length_mi=20.10
|terminus_a=Route 184 in Stonington
|terminus_b=Route 12 in Griswold
|notes=none
|established=1934
}}
{{routelist row
|state=CT
|type=CT 1926
|route=202
|length_mi=
|terminus_a=
|terminus_b=
|established=
|decommissioned=1935
|notes=Renumbered Route 101 because of US 202
}}
{{routelist row
|state=CT
|type=CT
|route=203
|length_mi=5.32
|terminus_a=Route 32 in Windham
|terminus_b=US 6 in Windham
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=205
|length_mi=3.81
|terminus_a=Route 12 in Plainfield
|terminus_b=Route 169 in Brooklyn
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=207
|length_mi=16.01
|terminus_a=Route 85 in Hebron
|terminus_b=Route 97 in Sprague
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=209
|length_mi=2.93
|terminus_a=Route 109 in Morris
|terminus_b=US 202 in Litchfield
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT 1948
|route=211
|length_mi=
|terminus_a=
|terminus_b=
|established=
|decommissioned=1950
|notes=Now Route 14
}}
{{routelist row
|state=CT
|type=CT
|route=213
|length_mi=6.66
|terminus_a=Route 156 in Waterford
|terminus_b=US 1 in New London
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=214
|length_mi=7.30
|terminus_a=Route 12 in Ledyard
|terminus_b=Route 2 in Ledyard
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=215
|length_mi=4.65
|terminus_b=US 1 in Groton
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=216
|length_mi=2.78
|terminus_a=Route 49 in North Stonington
|terminus_b=Route 216 at the Rhode Island state line
|notes=none
|established=1934
}}
{{routelist row
|state=CT
|type=CT
|route=217
|length_mi=3.84
|terminus_a=Route 66 in Middlefield
|terminus_b=Route 372 in Cromwell
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=218
|length_mi=7.00
|terminus_a=US 44 in West Hartford
|terminus_b=I-291/Route 159 in Windsor
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=219
|length_mi=14.98
|terminus_a=US 202 in New Hartford
|terminus_b=Route 20 in Granby
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=220
|length_mi=5.80
|terminus_b=Route 220 at the Massachusetts state line
|notes=none
|established=1936
}}
{{routelist row
|state=CT
|type=CT
|route=222
|length_mi=8.08
|terminus_a=US 6/Route 8 in Thomaston
|terminus_b=Route 118 in Harwinton
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=229
|length_mi=5.94
|terminus_a=I-84 in Southington
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=234
|length_mi=6.95
|terminus_a=Route 27 in Stonington
|terminus_b=US 1 in Stonington
|notes=none
|established=1987
}}
{{routelist row
|state=CT
|type=CT
|route=243
|length_mi=6.70
|terminus_a=Route 115 in Ansonia
|terminus_b=Route 63 in New Haven
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=244
|length_mi=5.72
|terminus_a=Route 198 in Eastford
|terminus_b=Route 97 in Pomfret
|notes=none
|established=1988
}}
{{routelist row
|state=CT
|type=CT
|route=254
|length_mi=8.41
|terminus_a=US 6/Route 8 in Thomaston
|terminus_b=Route 118 in Litchfield
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=262
|length_mi=9.37
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=263
|length_mi=6.23
|terminus_a=Route 272 in Goshen
|terminus_b=US 44/Route 183 in Winchester
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=272
|length_mi=17.97
|terminus_a=Route 4 in Torrington
|terminus_b=Norfolk Road at the Massachusetts state line
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=275
|length_mi=4.15
|terminus_a=Route 31 in Coventry
|terminus_b=Route 195 in Mansfield
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=286
|length_mi=3.60
|terminus_a=Route 74 in Ellington
|terminus_b=Route 83 in Ellington
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=287
|length_mi=3.36
|terminus_a=Route 176 in Newington
|terminus_b=Route 3 in Wethersfield
|notes=none
|established=1970
}}
{{routelist row
|state=CT
|type=CT
|route=289
|length_mi=5.13
|terminus_a=Route 87 in Lebanon
|terminus_b=Route 32 in Windham
|notes=none
|established=1964
}}
{{routelist row
|state=CT
|type=CT
|route=291
|length_mi=
|terminus_a=
|terminus_b=
|established=1958
|decommissioned=1994
|notes=Now I-291
}}
{{routelist row
|state=CT
|type=CT
|route=302
|length_mi=7.96
|terminus_a=Route 53 in Bethel
|terminus_b=Route 25 in Newtown
|notes=none
|established=1974
}}
{{routelist row
|state=CT
|type=CT
|route=305
|length_mi=3.42
|terminus_a=Route 187 in Bloomfield
|terminus_b=Route 75 in Windsor
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=309
|length_mi=4.74
|terminus_a=Route 179 in Canton
|terminus_b=Route 167 in Simsbury
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=313
|length_mi=6.85
|terminus_a=Route 8/Route 67 in Seymour
|terminus_b=Route 243 in Woodbridge
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=314
|length_mi=2.07
|terminus_a=US 5/Route 15/Berlin Turnpike in Wethersfield
|terminus_b=Route 99 in Wethersfield
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=315
|length_mi=1.95
|terminus_a=US 202/Route 10 in Simsbury
|terminus_b=Route 189 in Simsbury
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=316
|length_mi=6.04
|terminus_a=Route 66 in Hebron
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=317
|length_mi=6.10
|terminus_a=Route 67 in Roxbury
|notes=none
|established=1964
}}
{{routelist row
|state=CT
|type=CT
|route=318
|length_mi=3.14
|terminus_a=US 44 in Barkhamsted
|terminus_b=Route 219 in Barkhamsted
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=319
|length_mi=2.83
|terminus_a=Route 190 in Stafford
|terminus_b=Route 19 in Stafford
|notes=none
|established=1988
}}
{{routelist row
|state=CT
|type=CT
|route=320
|length_mi=7.05
|terminus_a=Route 195 in Mansfield
|terminus_b=I-84 in Willington
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=322
|length_mi=9.80
|terminus_a=Route 69 in Wolcott
|terminus_b=I-691 in Southington
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=334
|length_mi=4.40
|terminus_a=Route 188 in Seymour
|terminus_b=Route 115 in Ansonia
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=337
|length_mi=4.91
|terminus_a=I-95/US 1 in New Haven
|terminus_b=Route 142 in East Haven
|notes=none
|established=1987
}}
{{routelist row
|state=CT
|type=CT
|route=341
|length_mi=15.97
|terminus_a=CR 3 at the New York state line
|terminus_b=US 202 in Washington
|established=1932
|established_ref={{cite news |title=Road Conditions in Connecticut |url=https://www.newspapers.com/clip/41010161/ct_numbers_september_17_1932/ |access-date=December 24, 2019 |work=The Hartford Daily Courant |date=September 17, 1932 |page=18|via=Newspapers.com}} {{open access}}
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=343
|length_mi=1.50
|terminus_a=NY 343 at the New York state line
|terminus_b=Route 4/Route 41 in Sharon
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=349
|length_mi=4.17
|terminus_a=Shennecossett Road in Groton
|terminus_b=I-95/US 1 in Groton
|notes=none
|established=1985
}}
{{routelist row
|state=CT
|type=CT
|route=354
|length_mi=7.37
|terminus_a=Route 85 in Colchester
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=361
|length_mi=3.54
|terminus_a=Route 41 in Sharon
|terminus_b=CR 62 at the New York state line
|notes=none
|established=1966
}}
{{routelist row
|state=CT
|type=CT
|route=364
|length_mi=4.56
|terminus_a=Route 120 in Southington
|terminus_b=Route 71 in Berlin
|notes=none
|established=1964
}}
{{routelist row
|state=CT
|type=CT
|route=372
|length_mi=15.12
|terminus_a=Route 72/East Main Street in Plainville
|terminus_b=Route 99 in Cromwell
|notes=none
|established=1978
}}
{{routelist bottom}}
Special service roads
{{Main|List of special service roads in Connecticut}}
Roads classified by the Department of Transportation as special service roads are given an unsigned number designation between 400 and 499. Special service roads are roads that connect a federal or state facility (including state parks and some Interstate Highway interchanges) to a signed state route. These numbers only appear in internal documentation, none of them are signed.
State roads
{{Main|List of state roads in Connecticut}}
State Roads are state-maintained roads that are usually long entrance/exit ramps to/from an expressway, or short interconnecting roads between signed routes. Roads classified by the Department of Transportation as state roads are given an unsigned number designation between 500 and 999. The first digit denotes which Maintenance District the road is mainly located in:
- 500–599: District 1: Greater Hartford
- 600–699: District 2: Quiet Corner, Lower Connecticut River Valley, Southeastern Connecticut
- 700–799: District 3: Southwestern Connecticut, Greater New Haven
- 800–899: District 4: Naugatuck River Valley, Greater Danbury, Northwestern Connecticut
- 900–999: Statewide; very short routes
State road numbers are only for internal record-keeping and documentation, all of these roads are unsigned.
History
= 1913 trunk line system =
In 1900, the State Highway Department proposed a statewide system of trunk line routes. By 1913, the system consisted of 10 north-south highways and 4 east-west highways, including the lower Boston Post Road. The system covered roughly {{convert|1400|mi|km}}. The 14 trunk lines were numbered on paper but were never actually signposted. The 14 trunk line routes were:
- Route 1: east-west from Greenwich to Stonington, roughly modern U.S. Route 1
- Route 2: north-south from Stamford to Salisbury, roughly modern Route 106, Route 33, Route 35, U.S. Route 7, Route 341, Route 41
- Route 3: north-south from Norwalk to North Canaan, roughly modern U.S. Route 7, Route 107, Route 53, Route 37, U.S. Route 202, Route 45, U.S. Route 7
- Route 4: north-south from Bridgeport to Colebrook, roughly modern Route 8
- Route 5: north-south from New Haven to Suffield via Cheshire (concurrent with Route 6 north of Hartford), roughly modern Route 10, Route 4, Route 159
- Route 6: north-south from New Haven to Suffield via Meriden (concurrent with Route 5 north of Hartford), roughly modern U.S. Route 5, Route 71, Route 159
- Route 7: north-south from New Haven to Enfield via Middletown, roughly modern Route 17, Route 99, U.S. Route 5
- Route 8: north-south from Old Saybrook to Hartford, roughly modern Route 9, Route 99
- Route 9: north-south from New London to Colebrook, roughly modern Route 85, Route 2, Route 189, Route 20
- Route 10: north-south from New London to Thompson, roughly modern Route 32, Route 169, Route 12, Route 193
- Route 11: north-south from Stonington to Woodstock, roughly modern Route 2, Route 32, U.S. Route 6, Route 198
- Route 12: east-west from Salisbury to Putnam, roughly Twin Lakes Road, modern U.S. Route 44
- Route 13: east-west from Kent to Sterling, roughly modern Route 341, U.S. Route 202, Route 118, Route 4, U.S. Route 6, Route 14
- Route 14: east-west from Sherman to Killingly, roughly Route 37, Route 67, Route 317, Route 64, Route 322, Route 66, U.S. Route 6
=New England road marking system=
The first public route numbering came with the advent of the New England road marking system of 1922. This highway numbering system was used throughout New England and consisted of 25 routes (with route numbers from 1 to 32). A total of 9 of the routes passed through Connecticut (Routes 1, 2, 3, 4, 8, 10, 12, 17, and 32). In this system, inter-state routes would be numbered 1–99 and state routes numbered 100 and up. The New England route system was soon eclipsed by the national U.S. highway system.
= 1922–1931 =
The State Highway Department classified state roads as either State Highways (SH) or State Aid Roads (SA). These roads were given number designations – 100–299 for primary routes and 300+ for secondary routes. Some state roads were signposted and some were not.
= 1932 renumbering =
{{main|1932 state highway renumbering (Connecticut)}}
The state abandoned its old numbering system and renumbered almost all of their state highways in 1932. Most of the present route numbers were formed during this renumbering. The only route numbers that survived were U.S. Routes and a few state highway routes. For route numbers established in 1932, the new numbering system used odd numbers for north-south routes and even numbers for east-west routes, matching the U.S. Highway numbering system. The New England routes that were grandfathered into the highway system (Routes 8, 10, 12, 32) did not follow the new system. The state also assigned new route numbers in clusters, with routes in the same general location having numbers close to each other as well. Shortly after the renumbering, in 1935, two new U.S. Routes were commissioned: US 44 (taking over part of old New England Route 17) and US 202.
= 1963 renumbering =
In 1963, the state passed the Road Reclassification Act to fix the by now fragmented state highway system. Many state highways had state maintenance gaps and several highway segments were even isolated from the rest of the system. State highways were classified into primary, secondary, and service roads. Primary routes were essentially left unchanged, while minor realignments, additions/deletions, and extensions occurred in many secondary routes. About 1/3 of all routes were changed to some degree by this renumbering. The current system of unsigned ("secret") routes, including the special service roads, was also created during this renumbering. The state highway system has not had any major changes since then. The state completely abandoned the odd/even numbering scheme established in 1932 with new numbers in 1963 assigned without regard to their direction or general location.
See also
{{Portal|Connecticut|U.S. Roads}}
- List of crossings of the Connecticut River
- New England Interstate Routes
- Numbered highways in the United States
{{clear}}
References
{{reflist|refs=}}
External links
{{commons category|Roads in Connecticut}}
- [https://web.archive.org/web/20150905063334/http://www.ct.gov/dot/LIB/dot/Documents/dpolicy/hwylog/hwylog.pdf Connecticut State Numbered Routes and Roads as of December 31, 2004] (PDF)
- [http://www.ct.gov/ecd/LIB/ecd/20/14/connecticut%20road%20map%2011%20x%2017.pdf Official State Highway Map] (PDF – 5 MB)
- [http://www.kurumi.com/roads/ct/ct-finder.html Routes Page] by Kurumi
- [http://www.gribblenation.net/ctends/ CT State Highway Endpoint Photos]
- [http://www.greaternyroads.info/routelst/ctstate1.htm Connecticut US and State Route Listing (Greater New York Roads)]
{{US state highways}}
{{DEFAULTSORT:List Of State Routes In Connecticut}}