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{{Short description|None}}
{{Use American English|date=July 2025}}
{{Use mdy dates|date=January 2025}}
{{Infobox state highway system
|title=State Route System
|shields=[[File:Connecticut Highway 8.svg|75px]] [[File:Connecticut Highway 15.svg|75px]] [[File:Connecticut Highway 169.svg|75px]]
| 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).
<br>
State roads maintained by the [[Connecticut Department of Transportation|CTDOT]].
|links=CT
}}
The [[Connecticut Department of Transportation]] (CTDOT) maintains a system of [[state highway]]s to serve the predominant flow of traffic between [[New England town|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 highway]]s and [[U.S. highway]]s 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 highway]]s: 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 top|length_ref=<ref name="Connecticut Highway Log">[http://www.ct.gov/dot/LIB/dot/Documents/dpolicy/hwylog/hwylog.pdf Connecticut State Numbered Routes and Roads as of December 31, 2014] {{webarchive|url=https://web.archive.org/web/20150905063334/http://www.ct.gov/dot/LIB/dot/Documents/dpolicy/hwylog/hwylog.pdf |date=September 5, 2015 }}<!-- will create proper template later --></ref>}}
{{routelist row
|state=CT
|type=CT
|route=2
|length_mi=58.03
|terminus_a=Columbus Boulevard/State Street in [[Hartford, Connecticut|Hartford]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]] in [[Stonington, Connecticut|Stonington]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=2A
|length_mi=9.91
|terminus_a=[[Interstate 395 (Connecticut–Massachusetts)|I-395]]/[[Connecticut Route 2|Route 2]]/[[Connecticut Route 32|Route 32]] in [[Norwich, Connecticut|Norwich]]
|terminus_b=[[Connecticut Route 2|Route 2]] in [[Preston, Connecticut|Preston]]
|established=1967
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=3
|length_mi=14.48
|terminus_a=[[Connecticut Route 66|Route 66]] in [[Middletown, Connecticut|Middletown]]
|terminus_b=[[Connecticut Route 2|Route 2]] in [[East Hartford, Connecticut|East Hartford]]
|established=1941
|notes=Extended in 1991
}}
{{routelist row
|state=CT
|type=CT
|route=4
|length_mi=46.72
|terminus_a=[[Connecticut Route 41|Route 41]]/[[Connecticut Route 343|Route 343]] in [[Sharon, Connecticut|Sharon]]
|terminus_b=Farmington Avenue in [[West Hartford, Connecticut|West Hartford]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=8
|length_mi=67.36
|terminus_a=[[Interstate 95 in Connecticut|I-95]] in [[Bridgeport, Connecticut|Bridgeport]]
|terminus_b=[[Massachusetts Route 8|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_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Stratford, Connecticut|Stratford]]
|terminus_b=[[Connecticut Route 8|Route 8]] in Stratford
|established=1932
|established_ref=<ref name="1932renumSep" />
|decommissioned=1951
|notes=Now [[Connecticut Route 110|Route 110]]
}}
{{routelist row
|state=CT
|type=CT
|route=9
|length_mi=40.89
|terminus_a=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]] in [[Old Saybrook, Connecticut|Old Saybrook]]
|terminus_b=[[Interstate 84 in Connecticut|I-84]]/[[U.S. Route 6 in Connecticut|US 6]] in [[Farmington, Connecticut|Farmington]]
|established=1932
|established_ref=<ref name="1932renumAug6">{{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=[[Hartford Courant|The Hartford Daily Courant]] |date=August 6, 1932 |page=13|via=Newspapers.com}} {{open access}}</ref>
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=9A
|length_mi=15.4
|terminus_a=[[Connecticut Route 9|Route 9]] in [[Essex, Connecticut|Essex]]
|terminus_b=[[Connecticut Route 9|Route 9]] in [[Middletown, Connecticut|Middletown]]
|established=1968
|decommissioned=1986
|notes=Now [[Connecticut Route 154|Route 154]]
}}
{{routelist row
|state=CT
|type=CT
|route=10
|length_mi=54.28
|terminus_a=[[Interstate 95 in Connecticut|I-95]] in [[New Haven, Connecticut|New Haven]]
|terminus_b=[[U.S. Route 202 in Massachusetts|US 202]]/[[Massachusetts Route 10|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, Connecticut|New Haven]]
|terminus_b=[[Connecticut Route 10|Route 10]] in [[Hamden, Connecticut|Hamden]]
|established=1932
|decommissioned=1970
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=11
|length_mi=7.42<!-- planned length of 17.80 minus unconstructed stretch of 10.38 -->
|terminus_a=[[Connecticut Route 82|Route 82]] in [[Salem, Connecticut|Salem]]
|terminus_b=[[Connecticut Route 2|Route 2]] in [[Colchester, Connecticut|Colchester]]
|notes=Length includes only completed portion
|established=July 1971
|
}}
{{routelist row
|state=CT
|type=CT
|route=12
|length_mi=54.46
|terminus_a=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]]/[[Connecticut Route 184|Route 184]] in [[Groton, Connecticut|Groton]]
|terminus_b=[[Massachusetts Route 12|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=[[Connecticut Route 66|Route 66]]/[[Connecticut Route 195|Route 195]] in [[Windham, Connecticut|Windham]]
|terminus_b=[[Rhode Island Route 14|Route 14]] at the [[Rhode Island]] state line
|established=1932
|established_ref=<ref name="1932renumAug6" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=14A
|length_mi=10.27
|terminus_a=[[Connecticut Route 14|Route 14]] in [[Plainfield, Connecticut|Plainfield]]
|terminus_b=[[Connecticut Route 14|Route 14]] in [[Sterling, Connecticut|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)|New York]] state line
|terminus_b=[[Interstate 84 in Connecticut|I-84]]/[[U.S. Route 6 in Connecticut|US 6]] in [[East Hartford, Connecticut|East Hartford]]
|notes=Includes [[Merritt Parkway]], [[Wilbur Cross Parkway]], [[Berlin Turnpike]], and [[Wilbur Cross Highway]]; relocated in 1948
|established=1932
|established_ref=<ref name="1932renum">{{cite news |title=Road Conditions in Connecticut |url=https://www.newspapers.com/clip/41009589/1932_ct_renumbering_may_27_1932/ |access-date=December 24, 2019 |work=The Hartford Daily Courant|date=May 27, 1932 |page=14|via=Newspapers.com}} {{open access}}</ref>
}}
{{routelist row
|state=CT
|type=CT 1926
|route=15A
|length_mi=3.02
|terminus_a=[[Special routes of U.S. Route 6#Woodbury–Willimantic alternate route|US 6A]]/[[Connecticut Route 15|Route 15]] in [[Portland, Connecticut|Portland]]
|terminus_b=[[Connecticut Route 15|Route 15]] in Portland
|established=1932
|decommissioned=1948
|notes=Now [[Connecticut Route 17#Route 17A|Route 17A]]
}}
{{routelist row
|state=CT
|type=CT
|route=16
|length_mi=17.05
|terminus_a=[[Connecticut Route 66|Route 66]] in [[East Hampton, Connecticut|East Hampton]]
|terminus_b=[[Connecticut Route 207|Route 207]] in [[Lebanon, Connecticut|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=[[Interstate 91|I-91]]/[[Connecticut Route 80|Route 80]]/Middletown Avenue in [[New Haven, Connecticut|New Haven]]
|terminus_b=[[Connecticut Route 2|Route 2]] in [[Glastonbury, Connecticut|Glastonbury]]
|established=1948
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=17A
|length_mi=3.02
|terminus_a=[[Connecticut Route 17|Route 17]]/[[Connecticut Route 66|Route 66]] in [[Portland, Connecticut|Portland]]
|terminus_b=[[Connecticut Route 17|Route 17]] in Portland
|established=1948
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1948
|route=18
|length_mi=2.23
|terminus_a=[[Connecticut Route 72|Route 72]] in [[Cromwell, Connecticut|Cromwell]]
|terminus_b=[[Connecticut Route 9|Route 9]] in Cromwell
|established=1940
|decommissioned=1951
|notes=Now [[Connecticut Route 372|Route 372]]
}}
{{routelist row
|state=CT
|type=CT
|route=19
|length_mi=6.99
|terminus_a=[[Connecticut Route 190|Route 190]] in [[Stafford, Connecticut|Stafford]]
|terminus_b=[[Massachusetts Route 19|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=[[Connecticut Route 8|Route 8]] in [[Winchester, Connecticut|Winchester]]
|terminus_b=[[Interstate 91|I-91]] in [[Windsor Locks, Connecticut|Windsor Locks]]
|notes=Includes part of [[Bradley Airport Connector]]
|established=1932
|established_ref=<ref name="1932renum" />
}}
{{routelist row
|state=CT
|type=CT
|route=21
|length_mi=5.67
|terminus_a=[[Connecticut Route 12|Route 12]] in [[Killingly, Connecticut|Killingly]]
|terminus_b=[[Connecticut Route 193|Route 193]] in [[Thompson, Connecticut|Thompson]]
|established=1944
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=22
|length_mi=14.07
|terminus_a=[[Connecticut Route 10|Route 10]]/[[Connecticut Route 40|Route 40]] in [[Hamden, Connecticut|Hamden]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]] in [[Guilford, Connecticut|Guilford]]
|established=1951
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=25
|length_mi=28.59
|terminus_a=[[Interstate 95 in Connecticut|I-95]] in [[Bridgeport, Connecticut|Bridgeport]]
|terminus_b=[[U.S. Route 202 in Connecticut|US 202]] in [[Brookfield, Connecticut|Brookfield]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1926
|route=25A
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|established_ref=<ref name="1932renum" />
|decommissioned=1933
|notes=Now part of [[Connecticut Route 25|Route 25]]
}}
{{routelist row
|state=CT
|type=CT
|route=27
|length_mi=3.21
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Stonington, Connecticut|Stonington]]
|terminus_b=[[Connecticut Route 184|Route 184]] in [[Groton, Connecticut|Groton]]
|established=1950
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1963
|route=29
|length_mi=9.41
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Darien, Connecticut|Darien]]
|terminus_b=Westchester Avenue at the [[New York (state)|New York]] state line
|established=1932
|decommissioned=1966
|notes=Renumbered [[Connecticut Route 124|Route 124]] to match New York
}}
{{routelist row
|state=CT
|type=CT
|route=30
|length_mi=20.94
|terminus_a=[[Interstate 291 (Connecticut)|I-291]]/[[U.S. Route 5 in Connecticut|US 5]] in [[South Windsor, Connecticut|South Windsor]]
|terminus_b=[[Connecticut Route 190|Route 190]] in [[Stafford, Connecticut|Stafford]]
|established=1943
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=31
|length_mi=14.34
|terminus_b=[[Connecticut Route 74|Route 74]] in [[Vernon, Connecticut|Vernon]]
|terminus_a=[[Connecticut Route 32|Route 32]] in [[Mansfield, Connecticut|Mansfield]]
|established=1942
|notes=Extended in 1963
}}
{{routelist row
|state=CT
|type=CT
|route=32
|length_mi=54.88
|terminus_a=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]]/Eugene O'Neill Drive in [[New London, Connecticut|New London]]
|terminus_b=[[Massachusetts Route 32|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=[[Interstate 95 in Connecticut|I-95]]/[[Connecticut Route 136|Route 136]] in [[Westport, Connecticut|Westport]]
|terminus_b=[[Connecticut Route 35|Route 35]] in [[Ridgefield, Connecticut|Ridgefield]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=34
|length_mi=21.88
|terminus_a=Washington Avenue in [[Newtown, Connecticut|Newtown]]
|terminus_b=[[Connecticut Route 10|Route 10]] in [[New Haven, Connecticut|New Haven]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=Removed from the [[Oak Street Connector]] in 2023
}}
{{routelist row
|state=CT
|type=CT
|route=35
|length_mi=5.66
|terminus_a=[[New York State Route 35|NY 35]] at the [[New York (state)|New York]] state line
|terminus_b=[[U.S. Route 7 in Connecticut|US 7]] in [[Ridgefield, Connecticut|Ridgefield]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=35A
|length_mi=1.02
|terminus_a=West Lane at the [[New York (state)|New York]] state line
|terminus_b=[[Connecticut Route 35|Route 35]] in [[Ridgefield, Connecticut|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=[[Interstate 84 in Connecticut|I-84]]/[[U.S. Route 6 in Connecticut|US 6]]/[[U.S. Route 7 in Connecticut|US 7]]/[[U.S. Route 202 in Connecticut|US 202]]/[[Connecticut Route 39|Route 39]]/[[Connecticut Route 53|Route 53]] in [[Danbury, Connecticut|Danbury]]
|terminus_b=[[U.S. Route 7 in Connecticut|US 7]] in [[New Milford, Connecticut|New Milford]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=39
|length_mi=22.76
|terminus_a=[[Interstate 84 in Connecticut|I-84]]/[[U.S. Route 6 in Connecticut|US 6]]/[[U.S. Route 7 in Connecticut|US 7]]/[[U.S. Route 202 in Connecticut|US 202]]/[[Connecticut Route 37|Route 37]]/[[Connecticut Route 53|Route 53]] in [[Danbury, Connecticut|Danbury]]
|terminus_b=[[Connecticut Route 55|Route 55]] in [[Sherman, Connecticut|Sherman]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=40
|length_mi=3.08
|terminus_a=[[Interstate 91 in Connecticut|I-91]]/Bailey Road in [[North Haven, Connecticut|North Haven]]
|terminus_b=[[Connecticut Route 10|Route 10]]/[[Connecticut Route 22|Route 22]] in [[Hamden, Connecticut|Hamden]]
|established=1976
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=41
|length_mi=17.86
|terminus_a=[[County Route 2 (Dutchess County, New York)|CR 2]] at the [[New York (state)|New York]] state line
|terminus_b=[[Massachusetts Route 41|Route 41]] at the [[Massachusetts]] state line
|established=1932
|established_ref=<ref name="1932renumJuly9" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=42
|length_mi=13.66
|terminus_a=[[Connecticut Route 67|Route 67]] in [[Oxford, Connecticut|Oxford]]
|terminus_b=[[Connecticut Route 10|Route 10]] in [[Cheshire, Connecticut|Cheshire]]
|established=1963
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=43
|length_mi=5.06
|terminus_a=[[Connecticut Route 4|Route 4]]/[[Connecticut Route 128|Route 128]] in [[Cornwall, Connecticut|Cornwall]]
|terminus_b=[[Connecticut Route 63|Route 63]] in Cornwall
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=45
|length_mi=10.29
|terminus_a=[[U.S. Route 202 in Connecticut|US 202]] in [[Washington, Connecticut|Washington]]
|terminus_b=[[U.S. Route 7 in Connecticut|US 7]] in [[Cornwall, Connecticut|Cornwall]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=47
|length_mi=12.27
|terminus_a=[[U.S. Route 6 in Connecticut|US 6]] in [[Woodbury, Connecticut|Woodbury]]
|terminus_b=[[U.S. Route 202 in Connecticut|US 202]] in [[Washington, Connecticut|Washington]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1948
|route=49
|length_mi=17.96
|terminus_a=[[Connecticut Route 4|Route 4]] in [[Torrington, Connecticut|Torrington]]
|terminus_b=Norfolk Road at the [[Massachusetts]] state line
|established=1932
|established_ref=<ref name="1932renumSep" />
|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=[[Connecticut Route 2|Route 2]] in [[Stonington, Connecticut|Stonington]]
|terminus_b=[[Connecticut Route 14A|Route 14A]] in [[Sterling, Connecticut|Sterling]]
|established=1959
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=51
|length_mi=9.4
|terminus_a=[[Connecticut Route 156|Route 156]] in [[Old Lyme, Connecticut|Old Lyme]]
|terminus_b=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]] in [[East Lyme, Connecticut|East Lyme]]
|established=1962
|decommissioned=1976
|notes=Former route of [[U.S. Route 1 in Connecticut|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_a=[[Interstate 95 in Connecticut|I-95]] in [[Waterford, Connecticut|Waterford]]
|terminus_b=[[Massachusetts Route 52|Route 52]] at the [[Massachusetts]] state line
|established=1964
|decommissioned=1983
|notes=Replaced by [[Interstate 395 (Connecticut–Massachusetts)|I-395]] when it was rerouted off of I-95
}}
{{routelist row
|state=CT
|type=CT
|route=53
|length_mi=23.57
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Norwalk, Connecticut|Norwalk]]
|terminus_b=[[Interstate 84 in Connecticut|I-84]]/[[U.S. Route 6 in Connecticut|US 6]]/[[U.S. Route 7 in Connecticut|US 7]]/[[U.S. Route 202 in Connecticut|US 202]]/[[Connecticut Route 37|Route 37]]/[[Connecticut Route 39|Route 39]] in [[Danbury, Connecticut|Danbury]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=55
|length_mi=2.64
|terminus_a=[[New York State Route 55|NY 55]] at the [[New York (state)|New York]] state line
|terminus_b=[[U.S. Route 7 in Connecticut|US 7]] in [[New Milford, Connecticut|New Milford]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=57
|length_mi=9.51
|terminus_a=[[Connecticut Route 33|Route 33]] in [[Westport, Connecticut|Westport]]
|terminus_b=[[U.S. Route 7 in Connecticut|US 7]] in [[Georgetown, Connecticut|Georgetown]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=58
|length_mi=18.58
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Fairfield, Connecticut|Fairfield]]
|terminus_b=[[Connecticut Route 302|Route 302]] in [[Bethel, Connecticut|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=[[U.S. Route 1 in Connecticut|US 1]] in [[Bridgeport, Connecticut|Bridgeport]]
|terminus_b=[[Connecticut Route 25|Route 25]] in [[Monroe, Connecticut|Monroe]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=61
|length_mi=9.16
|terminus_a=[[U.S. Route 6 in Connecticut|US 6]] in [[Woodbury, Connecticut|Woodbury]]
|terminus_b=[[Connecticut Route 63|Route 63]] in [[Morris, Connecticut|Morris]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=63
|length_mi=52.57
|terminus_a=[[Connecticut Route 10|Route 10]] in [[New Haven, Connecticut|New Haven]]
|terminus_b=[[U.S. Route 7 in Connecticut|US 7]] in [[Canaan, Connecticut|Canaan]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=64
|length_mi=8.14
|terminus_a=[[U.S. Route 6 in Connecticut|US 6]] in [[Woodbury, Connecticut|Woodbury]]
|terminus_b=[[Interstate 84 in Connecticut|I-84]] in [[Waterbury, Connecticut|Waterbury]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1948
|route=65
|length_mi=9.66
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Bridgeport, Connecticut|Bridgeport]]
|terminus_b=[[Connecticut Route 8|Route 8]] in [[Shelton, Connecticut|Shelton]]
|established=1932
|established_ref=<ref name="1932renum" />
|decommissioned=1951
|notes=Redesignated as part of a rerouted [[Connecticut Route 8|Route 8]] in 1951
}}
{{routelist row
|state=CT
|type=CT 1948
|route=65A
|length_mi=2.91
|terminus_a=[[Connecticut Route 65|Route 65]] in [[Trumbull, Connecticut|Trumbull]]
|terminus_b=[[Connecticut Route 65|Route 65]] in [[Shelton, Connecticut|Shelton]]
|established=1944
|decommissioned=1951
|notes=Now [[Connecticut Route 108|Route 108]]
}}
{{routelist row
|state=CT
|type=CT
|route=66
|length_mi=38.38
|terminus_a=[[Interstate 91 in Connecticut|I-91]]/[[Interstate 691|I-691]] in [[Meriden, Connecticut|Meriden]]
|terminus_b=[[U.S. Route 6 in Connecticut|US 6]] in [[Windham, Connecticut|Windham]]
|established=1968
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=67
|length_mi=31.00
|terminus_b=[[U.S. Route 7 in Connecticut|US 7]]/[[U.S. Route 202 in Connecticut|US 202]] in [[New Milford, Connecticut|New Milford]]
|terminus_a=[[Connecticut Route 63|Route 63]] in [[Woodbridge, Connecticut|Woodbridge]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=67A
|length_mi=1.20
|terminus_a=[[Connecticut Route 133|Route 133]] in [[Bridgewater, Connecticut|Bridgewater]]
|terminus_b=[[Connecticut Route 67|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=[[Connecticut Route 63|Route 63]] in [[Naugatuck, Connecticut|Naugatuck]]
|terminus_b=[[Connecticut Route 17|Route 17]] in [[Durham, Connecticut|Durham]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=69
|length_mi=35.16
|terminus_a=[[Connecticut Route 63|Route 63]] in [[New Haven, Connecticut|New Haven]]
|terminus_b=[[Connecticut Route 4|Route 4]] in [[Burlington, Connecticut|Burlington]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=70
|length_mi=10.92
|terminus_a=[[Interstate 84 in Connecticut|I-84]] in [[Cheshire, Connecticut|Cheshire]]
|terminus_b=[[Connecticut Route 71|Route 71]] in [[Meriden, Connecticut|Meriden]]
|established=1932
|established_ref=<ref name="1932renumJuly9" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=71
|length_mi=19.19
|terminus_a=[[U.S. Route 5 in Connecticut|US 5]] in [[Wallingford, Connecticut|Wallingford]]
|terminus_b=[[Connecticut Route 173|Route 173]] in [[West Hartford, Connecticut|West Hartford]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=71A
|length_mi=2.92
|terminus_a=[[Connecticut Route 71|Route 71]] in [[Berlin, Connecticut|Berlin]]
|terminus_b=Kensington Avenue in [[New Britain, Connecticut|New Britain]]
|established=1978
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=72
|length_mi=20.05
|terminus_b=[[Connecticut Route 9|Route 9]]/[[Connecticut Route 71|Route 71]]/[[Connecticut Route 174|Route 174]] in [[New Britain, Connecticut|New Britain]]
|terminus_a=[[Connecticut Route 4|Route 4]] in [[Harwinton, Connecticut|Harwinton]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=73
|length_mi=3.46
|terminus_a=[[Connecticut Route 63|Route 63]] in [[Watertown, Connecticut|Watertown]]
|terminus_b=[[Connecticut Route 8|Route 8]] in [[Waterbury, Connecticut|Waterbury]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=74
|length_mi=22.21
|terminus_a=[[Connecticut Route 194|Route 194]] in [[South Windsor, Connecticut|South Windsor]]
|terminus_b=[[U.S. Route 44|US 44]] in [[Ashford, Connecticut|Ashford]]
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=75
|length_mi=13.52
|terminus_a=[[Connecticut Route 159|Route 159]]/[[Connecticut Route 305|Route 305]] in [[Windsor, Connecticut|Windsor]]
|terminus_b=[[Massachusetts Route 75|Route 75]] at the [[Massachusetts]] state line
|established=1932
|established_ref=<ref name="1932renumJuly9" />
|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=[[Connecticut Route 146|Route 146]] in [[Guilford, Connecticut|Guilford]]
|terminus_b=[[Connecticut Route 17|Route 17]] in [[Durham, Connecticut|Durham]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=78
|length_mi=0.43
|terminus_a=[[Connecticut Route 2|Route 2]] in [[Stonington, Connecticut|Stonington]]
|terminus_b=[[Rhode Island Route 78|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_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Madison, Connecticut|Madison]]
|terminus_b=[[Connecticut Route 17|Route 17]] in [[Durham, Connecticut|Durham]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=80
|length_mi=25.91
|terminus_a=[[Interstate 91|I-91]]/[[Connecticut Route 17|Route 17]] in [[New Haven, Connecticut|New Haven]]
|terminus_b=[[Connecticut Route 154|Route 154]] in [[Deep River, Connecticut|Deep River]]
|established=1932
|established_ref=<ref name="1932renumJuly9">{{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=[[Hartford Courant|The Hartford Daily Courant]] |date=July 9, 1932 |page=10|via=Newspapers.com}} {{open access}}</ref>
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=81
|length_mi=15.75
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Clinton, Connecticut|Clinton]]
|terminus_b=[[Connecticut Route 154|Route 154]] in [[Haddam, Connecticut|Haddam]]
|established=1932
|established_ref=<ref name="1932renumJuly9" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=82
|length_mi=28.47
|terminus_a=[[Connecticut Route 9|Route 9]] in [[Chester, Connecticut|Chester]]
|terminus_b=[[Connecticut Route 2|Route 2]]/[[Connecticut Route 32|Route 32]] in [[Norwich, Connecticut|Norwich]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=83
|length_mi=27.56
|terminus_a=New London Turnpike in [[Glastonbury, Connecticut|Glastonbury]]
|terminus_b=[[Massachusetts Route 83|Route 83]] at the [[Massachusetts]] state line
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=84
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1959
|decommissioned_ref=<ref name="ctchanges1959" />
|notes=Renumbered Route 95, and is now Route 184 because of [[Interstate 84 in Connecticut|I-84]]
}}
{{routelist row
|state=CT
|type=CT
|route=85
|length_mi=37.38
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[New London, Connecticut|New London]]
|terminus_b=[[U.S. Route 6 in Connecticut|US 6]]/[[U.S. Route 44|US 44]] in [[Bolton, Connecticut|Bolton]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|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=[[Connecticut Route 32|Route 32]] in [[Franklin, Connecticut|Franklin]]
|terminus_b=[[U.S. Route 6 in Connecticut|US 6]] in [[Andover, Connecticut|Andover]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=89
|length_mi=16.25
|terminus_a=[[Connecticut Route 195|Route 195]] in [[Mansfield, Connecticut|Mansfield]]
|terminus_b=[[Connecticut Route 190|Route 190]] in [[Union, Connecticut|Union]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=91
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|established_ref=<ref name="1932renum" />
|decommissioned=1959
|decommissioned_ref=<ref name="ctchanges1959" />
|notes=Renumbered [[Connecticut Route 171|Route 171]] to avoid confusion with [[Interstate 91 in Connecticut|I-91]]
}}
{{routelist row
|state=CT
|type=CT 1956
|route=93
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|established_ref=<ref name="1932renum" />
|decommissioned=1959
|decommissioned_ref=<ref name="ctchanges1959" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=94
|length_mi=9.33
|terminus_a=[[Connecticut Route 2|Route 2]] in [[Glastonbury, Connecticut|Glastonbury]]
|terminus_b=[[Connecticut Route 85|Route 85]] in [[Hebron, Connecticut|Hebron]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1956
|route=95
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|established_ref=<ref name="1932renum" />
|decommissioned=1959
|decommissioned_ref=<ref name="ctchanges1959" />
|notes=Renumbered Route 49 because of [[Interstate 95 in Connecticut|I-95]]
}}
{{routelist row
|state=CT
|type=CT 1963
|route=95
|length_mi=
|terminus_a=
|terminus_b=
|established=1959
|established_ref=<ref name="ctchanges1959" />
|decommissioned=1964
|notes=Renumbered Route 184
}}
{{routelist row
|state=CT
|type=CT 1956
|route=95A
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1959
|decommissioned_ref=<ref name="ctchanges1959" />
|notes=Renumbered Route 14
}}
{{routelist row
|state=CT
|type=CT
|route=97
|length_mi=29.14
|terminus_a=[[Connecticut Route 12|Route 12]] in [[Norwich, Connecticut|Norwich]]
|terminus_b=[[U.S. Route 44|US 44]]/[[Connecticut Route 169|Route 169]] in [[Pomfret, Connecticut|Pomfret]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=99
|length_mi=10.64
|terminus_a=[[Connecticut Route 9|Route 9]] in [[Cromwell, Connecticut|Cromwell]]
|terminus_b=[[U.S. Route 5 in Connecticut|US 5]]/[[Connecticut Route 15|Route 15]]/Wethersfield Avenue in [[Wethersfield, Connecticut|Wethersfield]]
|established=1969
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=100
|length_mi=4.40
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[East Haven, Connecticut|East Haven]]
|terminus_b=[[Connecticut Route 80|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 [[U.S. Route 44|US 44]]
}}
{{routelist row
|state=CT
|type=CT
|route=101
|length_mi=9.46
|terminus_a=[[U.S. Route 44|US 44]] in [[Pomfret, Connecticut|Pomfret]]
|terminus_b=[[Rhode Island Route 101|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=[[Connecticut Route 35|Route 35]] in [[Ridgefield, Connecticut|Ridgefield]]
|terminus_b=[[U.S. Route 7 in Connecticut|US 7]] in Ridgefield
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=103
|length_mi=5.31
|terminus_a=[[Connecticut Route 80|Route 80]] in [[New Haven, Connecticut|New Haven]]
|terminus_b=[[U.S. Route 5 in Connecticut|US 5]]/[[Connecticut Route 22|Route 22]] in [[North Haven, Connecticut|North Haven]]
|established=1987
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=104
|length_mi=6.82
|terminus_a=[[Connecticut Route 137|Route 137]] in [[Stamford, Connecticut|Stamford]]
|terminus_b=Long Ridge Road at the [[New York (state)|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 [[Connecticut Route 190|Route 190]]
}}
{{routelist row
|state=CT
|type=CT 1956
|route=106
|length_mi=
|terminus_a=[[Connecticut Route 58|Route 58]] near [[Easton, Connecticut|Easton]]
|terminus_b=[[Connecticut Route 59|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=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]] in [[Stamford, Connecticut|Stamford]]
|terminus_b=[[Connecticut Route 53|Route 53]] in [[Wilton, Connecticut|Wilton]]
|established=1963
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=107
|length_mi=7.50
|terminus_a=[[U.S. Route 7 in Connecticut|US 7]] in [[Georgetown, Connecticut|Georgetown]]
|terminus_b=[[Connecticut Route 58|Route 58]] in [[Redding, Connecticut|Redding]]
|
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=108
|length_mi=11.05
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Stratford, Connecticut|Stratford]]
|terminus_b=[[Connecticut Route 110|Route 110]] in [[Shelton, Connecticut|Shelton]]
|established=1932
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=109
|length_mi=20.93
|terminus_a=[[U.S. Route 202 in Connecticut|US 202]] in [[New Milford, Connecticut|New Milford]]
|terminus_b=[[U.S. Route 6 in Connecticut|US 6]] in [[Thomaston, Connecticut|Thomaston]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=110
|length_mi=15.95
|terminus_a=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]]/[[Connecticut Route 130|Route 130]] in [[Stratford, Connecticut|Stratford]]
|terminus_b=[[Connecticut Route 111|Route 111]] in [[Monroe, Connecticut|Monroe]]
|established=1935
|notes=Extended in 1952
}}
{{routelist row
|state=CT
|type=CT
|route=111
|length_mi=11.71
|terminus_a=[[Connecticut Route 15|Route 15]]/[[Merritt Parkway]] in [[Trumbull, Connecticut|Trumbull]]
|terminus_b=[[Connecticut Route 34|Route 34]] in [[Monroe, Connecticut|Monroe]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=112
|length_mi=6.68
|terminus_a=[[U.S. Route 44|US 44]] in [[Salisbury, Connecticut|Salisbury]]
|terminus_b=[[U.S. Route 7 in Connecticut|US 7]] in Salisbury
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=113
|length_mi=8.12
|terminus_a=[[Interstate 95 in Connecticut|I-95]] at the [[Bridgeport, Connecticut|Bridgeport]]–[[Stratford, Connecticut|Stratford]] line
|terminus_b=[[Connecticut Route 110|Route 110]] in Stratford
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=114
|length_mi=7.92
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Orange, Connecticut|Orange]]
|terminus_b=[[Connecticut Route 63|Route 63]] in [[Woodbridge, Connecticut|Woodbridge]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=115
|length_mi=5.66
|terminus_a=[[Connecticut Route 34|Route 34]] in [[Derby, Connecticut|Derby]]
|terminus_b=[[Connecticut Route 67|Route 67]] in [[Seymour, Connecticut|Seymour]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1963
|route=116
|length_mi=
|terminus_a=
|terminus_b=
|established=1932
|established_ref=<ref name="1932renum" />
|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=[[Connecticut Route 35|Route 35]] in [[Ridgefield, Connecticut|Ridgefield]]
|terminus_b=[[New York State Route 116|NY 116]] at the [[New York (state)|New York]] state line
|notes=none
|established=1966
}}
{{routelist row
|state=CT
|type=CT
|route=117
|length_mi=11.32
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Groton, Connecticut|Groton]]
|terminus_b=[[Connecticut Route 2|Route 2]] in [[Preston, Connecticut|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=[[Connecticut Route 63|Route 63]] in [[Litchfield, Connecticut|Litchfield]]
|terminus_b=[[Connecticut Route 4|Route 4]] in [[Harwinton, Connecticut|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=[[Connecticut Route 322|Route 322]] in [[Southington, Connecticut|Southington]]
|terminus_b=[[Connecticut Route 10|Route 10]] in Southington
|notes=none
|established=1932
}}
{{routelist row
|state=NY
|type=NY
|route=120A
|length_mi=4.6
|terminus_a=[[New York State Route 120A|NY 120A]] at the [[New York (state)|New York]] state line
|terminus_b=[[New York State Route 120A|NY 120A]] at the New York state line
|notes=King St, [[Greenwich, Connecticut|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_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Milford, Connecticut|Milford]]
|terminus_b=[[Connecticut Route 34|Route 34]] in [[Orange, Connecticut|Orange]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=122
|length_mi=3.51
|terminus_a=[[Interstate 95 in Connecticut|I-95]] in [[West Haven, Connecticut|West Haven]]
|terminus_b=[[Connecticut Route 63|Route 63]] in [[New Haven, Connecticut|New Haven]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=123
|length_mi=8.37
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Norwalk, Connecticut|Norwalk]]
|terminus_b=[[New York State Route 123|NY 123]] at the [[New York (state)|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_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Darien, Connecticut|Darien]]
|terminus_b=Westchester Avenue at the [[New York (state)|New York]] state line
|notes=none
|established=1966
}}
{{routelist row
|state=CT
|type=CT
|route=125
|length_mi=1.24
|terminus_a=[[Connecticut Route 4|Route 4]] in [[Cornwall, Connecticut|Cornwall]]
|terminus_b=[[Connecticut Route 128|Route 128]] in Cornwall
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=126
|length_mi=6.08
|terminus_a=[[Connecticut Route 63|Route 63]] in [[Canaan, Connecticut|Canaan]]
|terminus_b=[[U.S. Route 44|US 44]] in [[North Canaan, Connecticut|North Canaan]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=127
|length_mi=6.80
|terminus_a=[[Interstate 95 in Connecticut|I-95]]/[[Connecticut Route 130|Route 130]] in [[Bridgeport, Connecticut|Bridgeport]]
|terminus_b=[[Connecticut Route 111|Route 111]] in [[Trumbull, Connecticut|Trumbull]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=128
|length_mi=4.03
|terminus_a=[[U.S. Route 7 in Connecticut|US 7]] in [[Sharon, Connecticut|Sharon]]
|terminus_b=[[Connecticut Route 4|Route 4]]/[[Connecticut Route 43|Route 43]] in [[Cornwall, Connecticut|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_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Fairfield, Connecticut|Fairfield]]
|terminus_b=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]]/[[Connecticut Route 110|Route 110]] in [[Stratford, Connecticut|Stratford]]
|notes=none
|established=1992
}}
{{routelist row
|state=CT
|type=CT 1926
|route=131
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1935
|notes=Renumbered [[Connecticut Route 199|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=[[Connecticut Route 12|Route 12]] in [[Thompson, Connecticut|Thompson]]
|terminus_b=[[Massachusetts Route 131|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=[[Connecticut Route 47|Route 47]] in [[Woodbury, Connecticut|Woodbury]]
|terminus_b=[[Connecticut Route 63|Route 63]] in [[Watertown, Connecticut|Watertown]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=133
|length_mi=20.05
|terminus_a=[[U.S. Route 202 in Connecticut|US 202]] in [[Brookfield, Connecticut|Brookfield]]
|terminus_b=[[Connecticut Route 67|Route 67]] in [[Bridgewater, Connecticut|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=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]] in [[Fairfield, Connecticut|Fairfield]]
|terminus_b=[[Connecticut Route 58|Route 58]] in Fairfield
|notes=none
|established=1953
}}
{{routelist row
|state=CT
|type=CT
|route=136
|length_mi=20.46
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Darien, Connecticut|Darien]]
|terminus_b=[[Connecticut Route 59|Route 59]] in [[Easton, Connecticut|Easton]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=137
|length_mi=9.33
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Stamford, Connecticut|Stamford]]
|terminus_b=[[New York State Route 137|NY 137]] at the [[New York (state)|New York]] state line
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=138
|length_mi=17.73
|terminus_a=[[Connecticut Route 97|Route 97]] in [[Sprague, Connecticut|Sprague]]
|terminus_b=[[Rhode Island Route 138|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_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Branford, Connecticut|Branford]]
|terminus_b=[[Connecticut Route 22|Route 22]]/[[Connecticut Route 80|Route 80]] in [[North Branford, Connecticut|North Branford]]
|established=1932
|established_ref=<ref name="1932renumAug6" />
|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=[[Connecticut Route 75|Route 75]] in [[Windsor Locks, Connecticut|Windsor Locks]]
|terminus_b=[[Connecticut Route 32|Route 32]]/[[Connecticut Route 190|Route 190]] in [[Stafford, Connecticut|Stafford]]
|established=1932
|established_ref=<ref name="1932renum" />
|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=[[U.S. Route 1 in Connecticut|US 1]] in [[East Haven, Connecticut|East Haven]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]]/[[Connecticut Route 146|Route 146]] in [[Branford, Connecticut|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_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Clinton, Connecticut|Clinton]]
|terminus_b=[[Connecticut Route 148|Route 148]] in [[Chester, Connecticut|Chester]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=146
|length_mi=13.00
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]]/[[Connecticut Route 142|Route 142]] in [[Branford, Connecticut|Branford]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]] in [[Guilford, Connecticut|Guilford]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=147
|length_mi=5.09
|terminus_a=[[Connecticut Route 17|Route 17]] in [[Durham, Connecticut|Durham]]
|terminus_b=[[Connecticut Route 66|Route 66]] in [[Middlefield, Connecticut|Middlefield]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=148
|length_mi=16.35
|terminus_a=[[Connecticut Route 79|Route 79]] in [[Killingworth, Connecticut|Killingworth]]
|terminus_b=[[Connecticut Route 82|Route 82]] in [[Lyme, Connecticut|Lyme]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=149
|length_mi=11.70
|terminus_a=[[Connecticut Route 82|Route 82]] in [[East Haddam, Connecticut|East Haddam]]
|terminus_b=[[Connecticut Route 2|Route 2]]/Old Hartford Road in [[Colchester, Connecticut|Colchester]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=150
|length_mi=9.04
|terminus_a=[[Connecticut Route 22|Route 22]] in [[North Branford, Connecticut|North Branford]]
|terminus_b=[[U.S. Route 5 in Connecticut|US 5]] in [[Wallingford, Connecticut|Wallingford]]
|notes=Extended in 1962
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=151
|length_mi=10.77
|terminus_a=[[Connecticut Route 82|Route 82]] in [[East Haddam, Connecticut|East Haddam]]
|terminus_b=[[Connecticut Route 66|Route 66]] in [[East Hampton, Connecticut|East Hampton]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=152
|length_mi=3.31
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Orange, Connecticut|Orange]]
|terminus_b=[[Connecticut Route 34|Route 34]] in Orange
|established=1932
|established_ref=<ref name="1932-0625renum">{{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=[[Hartford Courant|The Hartford Daily Courant]] |date=June 25, 1932 |page=18|via=Newspapers.com}} {{open access}}</ref>
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=153
|length_mi=5.27
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Westbrook, Connecticut|Westbrook]]
|terminus_b=[[Connecticut Route 9|Route 9]]/[[Connecticut Route 154|Route 154]] in [[Essex, Connecticut|Essex]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=154
|length_mi=28.24
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Old Saybrook, Connecticut|Old Saybrook]]
|terminus_b=[[Connecticut Route 9|Route 9]] in [[Higganum, Connecticut|Higganum]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=155
|length_mi=2.22
|terminus_a=[[Connecticut Route 17|Route 17]] in [[Middletown, Connecticut|Middletown]]
|terminus_b=[[Connecticut Route 9|Route 9]]/Randolph Road in Middletown
|notes=none
|established=1933
}}
{{routelist row
|state=CT
|type=CT
|route=156
|length_mi=22.76
|terminus_a=[[Connecticut Route 82|Route 82]] in [[East Haddam, Connecticut|East Haddam]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]] in [[Waterford, Connecticut|Waterford]]
|established=1932
|established_ref=<ref name="1932renum" />
|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=[[Connecticut Route 68|Route 68]] in [[Durham, Connecticut|Durham]]
|terminus_b=[[Connecticut Route 66|Route 66]] in [[Middletown, Connecticut|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, Connecticut|Hartford]]–[[Windsor, Connecticut|Windsor]] town line
|terminus_b=[[Massachusetts Route 159|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=[[U.S. Route 5 in Connecticut|US 5]]/[[Connecticut Route 15|Route 15]]/[[Berlin Turnpike]] in [[Berlin, Connecticut|Berlin]]
|terminus_b=[[Connecticut Route 17|Route 17]] in [[Glastonbury, Connecticut|Glastonbury]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=161
|length_mi=8.03
|terminus_a=[[Connecticut Route 156|Route 156]] in [[East Lyme, Connecticut|East Lyme]]
|terminus_b=[[Connecticut Route 85|Route 85]] in [[Montville, Connecticut|Montville]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=162
|length_mi=20.05
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Milford, Connecticut|Milford]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]] in [[Orange, Connecticut|Orange]]
|established=1932
|established_ref=<ref name="1932renumJuly23">{{cite news |title=Road Conditions in Connecticut |url=https://www.newspapers.com/clip/41032275/ct_renum_july_23_1932/ |access-date=December 24, 2019 |work=The Hartford Daily Courant |date=July 23, 1932 |page=9|via=Newspapers.com}} {{open access}}</ref>
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=163
|length_mi=12.86
|terminus_a=[[Connecticut Route 32|Route 32]] in [[Montville, Connecticut|Montville]]
|terminus_b=[[Connecticut Route 2|Route 2]] in [[Bozrah, Connecticut|Bozrah]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=164
|length_mi=7.83
|terminus_a=[[Connecticut Route 2|Route 2]] in [[Preston, Connecticut|Preston]]
|terminus_b=[[Connecticut Route 138|Route 138]] in [[Griswold, Connecticut|Griswold]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=165
|length_mi=16.01
|terminus_a=[[Connecticut Route 2|Route 2]] in [[Norwich, Connecticut|Norwich]]
|terminus_b=[[Rhode Island Route 165|Route 165]] at the [[Rhode Island]] state line
|established=1932
|established_ref=<ref name="1932-0625renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=166
|length_mi=1.62
|terminus_a=[[Connecticut Route 153|Route 153]] in [[Westbrook, Connecticut|Westbrook]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]] in [[Old Saybrook, Connecticut|Old Saybrook]]
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=167
|length_mi=10.41
|terminus_a=[[Connecticut Route 4|Route 4]] in [[Farmington, Connecticut|Farmington]]
|terminus_b=[[U.S. Route 202 in Connecticut|US 202]]/[[Connecticut Route 10|Route 10]] in [[Simsbury, Connecticut|Simsbury]]
|established=1932
|established_ref=<ref name="1932renumJuly23" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=168
|length_mi=7.93
|terminus_a=[[Massachusetts Route 168|Route 168]] at the [[Massachusetts]] state line
|terminus_b=[[Connecticut Route 75|Route 75]] in [[Suffield, Connecticut|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=[[Connecticut Route 2|Route 2]]/[[Connecticut Route 32|Route 32]] in [[Norwich, Connecticut|Norwich]]
|terminus_b=[[Massachusetts Route 169|Route 169]] at the [[Massachusetts]] state line
|notes=none
|established=1959
}}
{{routelist row
|state=CT
|type=CT
|route=171
|length_mi=20.70
|terminus_a=[[Interstate 84 in Connecticut|I-84]] in [[Union, Connecticut|Union]]
|terminus_b=[[U.S. Route 44|US 44]]/[[Connecticut Route 12|Route 12]] in [[Putnam, Connecticut|Putnam]]
|established=1959
|established_ref=<ref name="ctchanges1959">{{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}}</ref>
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=172
|length_mi=4.45
|terminus_a=[[Interstate 84 in Connecticut|I-84]]/[[U.S. Route 6 in Connecticut|US 6]] in [[Southbury, Connecticut|Southbury]]
|terminus_b=[[Connecticut Route 67|Route 67]] in Southbury
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=173
|length_mi=6.17
|terminus_a=[[U.S. Route 5 in Connecticut|US 5]]/[[Connecticut Route 15|Route 15]]/[[Berlin Turnpike]] in [[Newington, Connecticut|Newington]]
|terminus_b=[[Interstate 84 in Connecticut|I-84]]/[[U.S. Route 6 in Connecticut|US 6]]/South Main Street in [[West Hartford, Connecticut|West Hartford]]
|established=1932
|established_ref=<ref name="1932renumJunelist">{{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=[[Hartford Courant|The Hartford Daily Courant]] |date=June 5, 1932 |page=29|via=Newspapers.com}} {{open access}}</ref>
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=174
|length_mi=3.18
|terminus_a=[[Connecticut Route 9|Route 9]]/[[Connecticut Route 71|Route 71]]/[[Connecticut Route 72|Route 72]] in [[New Britain, Connecticut|New Britain]]
|terminus_b=[[Connecticut Route 176|Route 176]] in [[Newington, Connecticut|Newington]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=175
|length_mi=6.19
|terminus_a=[[Connecticut Route 71|Route 71]] in [[New Britain, Connecticut|New Britain]]
|terminus_b=[[Connecticut Route 99|Route 99]] in [[Wethersfield, Connecticut|Wethersfield]]
|established=1932
|established_ref=<ref name="1932renumJunelist" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=176
|length_mi=4.14
|terminus_a=[[U.S. Route 5 in Connecticut|US 5]]/[[Connecticut Route 15|Route 15]]/[[Berlin Turnpike]] in [[Newington, Connecticut|Newington]]
|terminus_b=Newington Avenue at the Newington–[[Hartford, Connecticut|Hartford]] line
|established=1932
|established_ref=<ref name="1932renumJunelist" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=177
|length_mi=12.57
|terminus_a=[[Connecticut Route 10|Route 10]] in [[Plainville, Connecticut|Plainville]]
|terminus_b=[[U.S. Route 44|US 44]]/[[U.S. Route 202 in Connecticut|US 202]] in [[Canton, Connecticut|Canton]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=178
|length_mi=6.89
|terminus_a=[[Connecticut Route 185|Route 185]] in [[Bloomfield, Connecticut|Bloomfield]]
|terminus_b=[[Connecticut Route 159|Route 159]] in [[Windsor, Connecticut|Windsor]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=179
|length_mi=16.50
|terminus_a=[[Connecticut Route 4|Route 4]] in [[Burlington, Connecticut|Burlington]]
|terminus_b=[[Connecticut Route 20|Route 20]] in [[Hartland, Connecticut|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=[[U.S. Route 44|US 44]] in [[Barkhamsted, Connecticut|Barkhamsted]]
|terminus_b=[[Connecticut Route 20|Route 20]] in [[Hartland, Connecticut|Hartland]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=182
|length_mi=3.81
|terminus_a=[[U.S. Route 44|US 44]] in [[Norfolk, Connecticut|Norfolk]]
|terminus_b=[[Connecticut Route 182A|Route 182A]]/[[Connecticut Route 183|Route 183]] in [[Colebrook, Connecticut|Colebrook]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=182A
|length_mi=2.09
|terminus_a=[[Connecticut Route 182|Route 182]] in [[Colebrook, Connecticut|Colebrook]]
|terminus_b=[[Connecticut Route 182|Route 182]]/[[Connecticut Route 183|Route 183]] in Colebrook
|notes=none
|established=1941
}}
{{routelist row
|state=CT
|type=CT
|route=183
|length_mi=19.06
|terminus_a=[[Connecticut Route 4|Route 4]] in [[Torrington, Connecticut|Torrington]]
|terminus_b=[[Massachusetts Route 183|Route 183]] at the [[Massachusetts]] state line
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=184
|length_mi=15.66
|terminus_a=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]]/[[Connecticut Route 12|Route 12]] in [[Groton, Connecticut|Groton]]
|terminus_b=[[Interstate 95 in Connecticut|I-95]]/[[Connecticut Route 216|Route 216]] in [[North Stonington, Connecticut|North Stonington]]
|notes=none
|established=1964
}}
{{routelist row
|state=CT
|type=CT
|route=185
|length_mi=6.36
|terminus_a=[[U.S. Route 202 in Connecticut|US 202]]/[[Connecticut Route 10|Route 10]] in [[Simsbury, Connecticut|Simsbury]]
|terminus_b=[[Connecticut Route 189|Route 189]] in [[West Hartford, Connecticut|West Hartford]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=186
|length_mi=3.57
|terminus_a=[[Connecticut Route 190|Route 190]] in [[Somers, Connecticut|Somers]]
|terminus_b=[[Massachusetts Route 186|Route 186]] at the [[Massachusetts]] state line
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=187
|length_mi=19.74
|terminus_a=[[U.S. Route 44|US 44]] in [[Hartford, Connecticut|Hartford]]
|terminus_b=[[Massachusetts Route 187|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=[[Connecticut Route 34|Route 34]] in [[Seymour, Connecticut|Seymour]]
|terminus_b=[[Connecticut Route 63|Route 63]] in [[Middlebury, Connecticut|Middlebury]]
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=189
|length_mi=20.32
|terminus_a=[[U.S. Route 44|US 44]] in [[Hartford, Connecticut|Hartford]]
|terminus_b=[[Massachusetts Route 189|Route 189]] at the [[Massachusetts]] state line
|established=1932
|established_ref=<ref name="1932renumAug6" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=190
|length_mi=28.27
|terminus_a=[[Connecticut Route 75|Route 75]] in [[Suffield, Connecticut|Suffield]]
|terminus_b=[[Connecticut Route 171|Route 171]] in [[Union, Connecticut|Union]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=191
|length_mi=9.30
|terminus_a=[[U.S. Route 5 in Connecticut|US 5]] in [[East Windsor, Connecticut|East Windsor]]
|terminus_b=[[Connecticut Route 190|Route 190]] in [[Enfield, Connecticut|Enfield]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=192
|length_mi=3.49
|terminus_a=[[Connecticut Route 190|Route 190]] in [[Enfield, Connecticut|Enfield]]
|terminus_b=[[Massachusetts Route 192|Route 192]] at the [[Massachusetts]] state line
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=193
|length_mi=6.63
|terminus_a=[[Connecticut Route 12|Route 12]] in [[Thompson, Connecticut|Thompson]]
|terminus_b=[[Massachusetts Route 193|Route 193]] at the [[Massachusetts]] state line
|established=1932
|established_ref=<ref name="1932renumAug6" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=194
|length_mi=3.67
|terminus_a=[[U.S. Route 5 in Connecticut|US 5]] in [[South Windsor, Connecticut|South Windsor]]
|terminus_b=[[Connecticut Route 30|Route 30]] in South Windsor
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=195
|length_mi=15.91
|terminus_a=[[Connecticut Route 66|Route 66]] in [[Windham, Connecticut|Windham]]
|terminus_b=[[Connecticut Route 74|Route 74]] in [[Tolland, Connecticut|Tolland]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=196
|length_mi=5.38
|terminus_a=[[Connecticut Route 151|Route 151]] in [[Haddam, Connecticut|Haddam]]
|terminus_b=[[Connecticut Route 66|Route 66]] in [[East Hampton, Connecticut|East Hampton]]
|established=1932
|established_ref=<ref name="1932renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=197
|length_mi=10.97
|terminus_a=[[Connecticut Route 171|Route 171]] in [[Union, Connecticut|Union]]
|terminus_b=[[Massachusetts Route 197|Route 197]] at the [[Massachusetts]] state line
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=198
|length_mi=19.22
|terminus_a=[[U.S. Route 6 in Connecticut|US 6]] in [[Chaplin, Connecticut|Chaplin]]
|terminus_b=[[Massachusetts Route 198|Route 198]] at the [[Massachusetts]] state line
|established=1932
|established_ref=<ref name="1932renumJunelist" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT 1926
|route=199
|length_mi=
|terminus_a=
|terminus_b=
|decommissioned=1935
|notes=Replaced by [[U.S. Route 44|US 44]]
}}
{{routelist row
|state=CT
|type=CT
|route=199
|length_mi=4.62
|terminus_a=[[Connecticut Route 67|Route 67]] in [[Roxbury, Connecticut|Roxbury]]
|terminus_b=[[Connecticut Route 47|Route 47]] in [[Washington, Connecticut|Washington]]
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=200
|length_mi=1.87
|terminus_a=[[Connecticut Route 12|Route 12]] in [[Thompson, Connecticut|Thompson]]
|terminus_b=[[Connecticut Route 193|Route 193]] in Thompson
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=201
|length_mi=20.10
|terminus_a=[[Connecticut Route 184|Route 184]] in [[Stonington, Connecticut|Stonington]]
|terminus_b=[[Connecticut Route 12|Route 12]] in [[Griswold, Connecticut|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 [[Connecticut Route 101|Route 101]] because of [[U.S. Route 202 in Connecticut|US 202]]
}}
{{routelist row
|state=CT
|type=CT
|route=203
|length_mi=5.32
|terminus_a=[[Connecticut Route 32|Route 32]] in [[Windham, Connecticut|Windham]]
|terminus_b=[[U.S. Route 6 in Connecticut|US 6]] in Windham
|established=1932
|established_ref=<ref name="1932renumJunelist" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=205
|length_mi=3.81
|terminus_a=[[Connecticut Route 12|Route 12]] in [[Plainfield, Connecticut|Plainfield]]
|terminus_b=[[Connecticut Route 169|Route 169]] in [[Brooklyn, Connecticut|Brooklyn]]
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=207
|length_mi=16.01
|terminus_a=[[Connecticut Route 85|Route 85]] in [[Hebron, Connecticut|Hebron]]
|terminus_b=[[Connecticut Route 97|Route 97]] in [[Sprague, Connecticut|Sprague]]
|established=1932
|established_ref=<ref name="1932renumJunelist" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=209
|length_mi=2.93
|terminus_a=[[Connecticut Route 109|Route 109]] in [[Morris, Connecticut|Morris]]
|terminus_b=[[U.S. Route 202 in Connecticut|US 202]] in [[Litchfield, Connecticut|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=[[Connecticut Route 156|Route 156]] in [[Waterford, Connecticut|Waterford]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]] in [[New London, Connecticut|New London]]
|established=1932
|established_ref=<ref name="1932renumSep" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=214
|length_mi=7.30
|terminus_a=[[Connecticut Route 12|Route 12]] in [[Ledyard, Connecticut|Ledyard]]
|terminus_b=[[Connecticut Route 2|Route 2]] in Ledyard
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=215
|length_mi=4.65
|terminus_a=[[U.S. Route 1 in Connecticut|US 1]] in [[Groton, Connecticut|Groton]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]] in Groton
|notes=none
|established=1932
}}
{{routelist row
|state=CT
|type=CT
|route=216
|length_mi=2.78
|terminus_a=[[Connecticut Route 49|Route 49]] in [[North Stonington, Connecticut|North Stonington]]
|terminus_b=[[Rhode Island Route 216|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=[[Connecticut Route 66|Route 66]] in [[Middlefield, Connecticut|Middlefield]]
|terminus_b=[[Connecticut Route 372|Route 372]] in [[Cromwell, Connecticut|Cromwell]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=218
|length_mi=7.00
|terminus_a=[[U.S. Route 44|US 44]] in [[West Hartford, Connecticut|West Hartford]]
|terminus_b=[[Interstate 291 (Connecticut)|I-291]]/[[Connecticut Route 159|Route 159]] in [[Windsor, Connecticut|Windsor]]
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=219
|length_mi=14.98
|terminus_a=[[U.S. Route 202 in Connecticut|US 202]] in [[New Hartford, Connecticut|New Hartford]]
|terminus_b=[[Connecticut Route 20|Route 20]] in [[Granby, Connecticut|Granby]]
|notes=none
|established=1935
}}
{{routelist row
|state=CT
|type=CT
|route=220
|length_mi=5.80
|terminus_a=[[U.S. Route 5 in Connecticut|US 5]] in [[Enfield, Connecticut|Enfield]]
|terminus_b=[[Massachusetts Route 220|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=[[U.S. Route 6 in Connecticut|US 6]]/[[Connecticut Route 8|Route 8]] in [[Thomaston, Connecticut|Thomaston]]
|terminus_b=[[Connecticut Route 118|Route 118]] in [[Harwinton, Connecticut|Harwinton]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=229
|length_mi=5.94
|terminus_a=[[Interstate 84 in Connecticut|I-84]] in [[Southington, Connecticut|Southington]]
|terminus_b=[[U.S. Route 6 in Connecticut|US 6]] in [[Bristol, Connecticut|Bristol]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=234
|length_mi=6.95
|terminus_a=[[Connecticut Route 27|Route 27]] in [[Stonington, Connecticut|Stonington]]
|terminus_b=[[U.S. Route 1 in Connecticut|US 1]] in Stonington
|notes=none
|established=1987
}}
{{routelist row
|state=CT
|type=CT
|route=243
|length_mi=6.70
|terminus_a=[[Connecticut Route 115|Route 115]] in [[Ansonia, Connecticut|Ansonia]]
|terminus_b=[[Connecticut Route 63|Route 63]] in [[New Haven, Connecticut|New Haven]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=244
|length_mi=5.72
|terminus_a=[[Connecticut Route 198|Route 198]] in [[Eastford, Connecticut|Eastford]]
|terminus_b=[[Connecticut Route 97|Route 97]] in [[Pomfret, Connecticut|Pomfret]]
|notes=none
|established=1988
}}
{{routelist row
|state=CT
|type=CT
|route=254
|length_mi=8.41
|terminus_a=[[U.S. Route 6 in Connecticut|US 6]]/[[Connecticut Route 8|Route 8]] in [[Thomaston, Connecticut|Thomaston]]
|terminus_b=[[Connecticut Route 118|Route 118]] in [[Litchfield, Connecticut|Litchfield]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=262
|length_mi=9.37
|terminus_a=[[U.S. Route 6 in Connecticut|US 6]] in [[Watertown, Connecticut|Watertown]]
|terminus_b=[[U.S. Route 6 in Connecticut|US 6]] in [[Plymouth, Connecticut|Plymouth]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=263
|length_mi=6.23
|terminus_a=[[Connecticut Route 272|Route 272]] in [[Goshen, Connecticut|Goshen]]
|terminus_b=[[U.S. Route 44|US 44]]/[[Connecticut Route 183|Route 183]] in [[Winchester, Connecticut|Winchester]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=272
|length_mi=17.97
|terminus_a=[[Connecticut Route 4|Route 4]] in [[Torrington, Connecticut|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=[[Connecticut Route 31|Route 31]] in [[Coventry, Connecticut|Coventry]]
|terminus_b=[[Connecticut Route 195|Route 195]] in [[Mansfield, Connecticut|Mansfield]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=286
|length_mi=3.60
|terminus_a=[[Connecticut Route 74|Route 74]] in [[Ellington, Connecticut|Ellington]]
|terminus_b=[[Connecticut Route 83|Route 83]] in Ellington
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=287
|length_mi=3.36
|terminus_a=[[Connecticut Route 176|Route 176]] in [[Newington, Connecticut|Newington]]
|terminus_b=[[Connecticut Route 3|Route 3]] in [[Wethersfield, Connecticut|Wethersfield]]
|notes=none
|established=1970
}}
{{routelist row
|state=CT
|type=CT
|route=289
|length_mi=5.13
|terminus_a=[[Connecticut Route 87|Route 87]] in [[Lebanon, Connecticut|Lebanon]]
|terminus_b=[[Connecticut Route 32|Route 32]] in [[Windham, Connecticut|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 [[Interstate 291 in Connecticut|I-291]]
}}
{{routelist row
|state=CT
|type=CT
|route=302
|length_mi=7.96
|terminus_a=[[Connecticut Route 53|Route 53]] in [[Bethel, Connecticut|Bethel]]
|terminus_b=[[Connecticut Route 25|Route 25]] in [[Newtown, Connecticut|Newtown]]
|notes=none
|established=1974
}}
{{routelist row
|state=CT
|type=CT
|route=305
|length_mi=3.42
|terminus_a=[[Connecticut Route 187|Route 187]] in [[Bloomfield, Connecticut|Bloomfield]]
|terminus_b=[[Connecticut Route 75|Route 75]] in [[Windsor, Connecticut|Windsor]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=309
|length_mi=4.74
|terminus_a=[[Connecticut Route 179|Route 179]] in [[Canton, Connecticut|Canton]]
|terminus_b=[[Connecticut Route 167|Route 167]] in [[Simsbury, Connecticut|Simsbury]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=313
|length_mi=6.85
|terminus_a=[[Connecticut Route 8|Route 8]]/[[Connecticut Route 67|Route 67]] in [[Seymour, Connecticut|Seymour]]
|terminus_b=[[Connecticut Route 243|Route 243]] in [[Woodbridge, Connecticut|Woodbridge]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=314
|length_mi=2.07
|terminus_a=[[U.S. Route 5 in Connecticut|US 5]]/[[Connecticut Route 15|Route 15]]/[[Berlin Turnpike]] in [[Wethersfield, Connecticut|Wethersfield]]
|terminus_b=[[Connecticut Route 99|Route 99]] in Wethersfield
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=315
|length_mi=1.95
|terminus_a=[[U.S. Route 202 in Connecticut|US 202]]/[[Connecticut Route 10|Route 10]] in [[Simsbury, Connecticut|Simsbury]]
|terminus_b=[[Connecticut Route 189|Route 189]] in Simsbury
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=316
|length_mi=6.04
|terminus_a=[[Connecticut Route 66|Route 66]] in [[Hebron, Connecticut|Hebron]]
|terminus_b=[[U.S. Route 6 in Connecticut|US 6]] in [[Andover, Connecticut|Andover]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=317
|length_mi=6.10
|terminus_a=[[Connecticut Route 67|Route 67]] in [[Roxbury, Connecticut|Roxbury]]
|terminus_b=[[U.S. Route 6 in Connecticut|US 6]] in [[Woodbury, Connecticut|Woodbury]]
|notes=none
|established=1964
}}
{{routelist row
|state=CT
|type=CT
|route=318
|length_mi=3.14
|terminus_a=[[U.S. Route 44|US 44]] in [[Barkhamsted, Connecticut|Barkhamsted]]
|terminus_b=[[Connecticut Route 219|Route 219]] in Barkhamsted
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=319
|length_mi=2.83
|terminus_a=[[Connecticut Route 190|Route 190]] in [[Stafford, Connecticut|Stafford]]
|terminus_b=[[Connecticut Route 19|Route 19]] in Stafford
|notes=none
|established=1988
}}
{{routelist row
|state=CT
|type=CT
|route=320
|length_mi=7.05
|terminus_a=[[Connecticut Route 195|Route 195]] in [[Mansfield, Connecticut|Mansfield]]
|terminus_b=[[Interstate 84 in Connecticut|I-84]] in [[Willington, Connecticut|Willington]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=322
|length_mi=9.80
|terminus_a=[[Connecticut Route 69|Route 69]] in [[Wolcott, Connecticut|Wolcott]]
|terminus_b=[[Interstate 691|I-691]] in [[Southington, Connecticut|Southington]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=334
|length_mi=4.40
|terminus_a=[[Connecticut Route 188|Route 188]] in [[Seymour, Connecticut|Seymour]]
|terminus_b=[[Connecticut Route 115|Route 115]] in [[Ansonia, Connecticut|Ansonia]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=337
|length_mi=4.91
|terminus_a=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]] in [[New Haven, Connecticut|New Haven]]
|terminus_b=[[Connecticut Route 142|Route 142]] in [[East Haven, Connecticut|East Haven]]
|notes=none
|established=1987
}}
{{routelist row
|state=CT
|type=CT
|route=341
|length_mi=15.97
|terminus_a=[[County Route 3 (Dutchess County, New York)|CR 3]] at the [[New York (state)|New York]] state line
|terminus_b=[[U.S. Route 202 in Connecticut|US 202]] in [[Washington, Connecticut|Washington]]
|established=1932
|established_ref=<ref name="1932renumSep">{{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=[[Hartford Courant|The Hartford Daily Courant]] |date=September 17, 1932 |page=18|via=Newspapers.com}} {{open access}}</ref>
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=343
|length_mi=1.50
|terminus_a=[[New York State Route 343|NY 343]] at the [[New York (state)|New York]] state line
|terminus_b=[[Connecticut Route 4|Route 4]]/[[Connecticut Route 41|Route 41]] in [[Sharon, Connecticut|Sharon]]
|established=1932
|established_ref=<ref name="1932-0625renum" />
|notes=none
}}
{{routelist row
|state=CT
|type=CT
|route=349
|length_mi=4.17
|terminus_a=Shennecossett Road in [[Groton, Connecticut|Groton]]
|terminus_b=[[Interstate 95 in Connecticut|I-95]]/[[U.S. Route 1 in Connecticut|US 1]] in Groton
|notes=none
|established=1985
}}
{{routelist row
|state=CT
|type=CT
|route=354
|length_mi=7.37
|terminus_a=[[Connecticut Route 85|Route 85]] in [[Colchester, Connecticut|Colchester]]
|terminus_b=[[Connecticut Route 82|Route 82]] in [[Salem, Connecticut|Salem]]
|notes=none
|established=1963
}}
{{routelist row
|state=CT
|type=CT
|route=361
|length_mi=3.54
|terminus_a=[[Connecticut Route 41|Route 41]] in [[Sharon, Connecticut|Sharon]]
|terminus_b=[[County Route 62 (Dutchess County, New York)|CR 62]] at the [[New York (state)|New York]] state line
|notes=none
|established=1966
}}
{{routelist row
|state=CT
|type=CT
|route=364
|length_mi=4.56
|terminus_a=[[Connecticut Route 120|Route 120]] in [[Southington, Connecticut|Southington]]
|terminus_b=[[Connecticut Route 71|Route 71]] in [[Berlin, Connecticut|Berlin]]
|notes=none
|established=1964
}}
{{routelist row
|state=CT
|type=CT
|route=372
|length_mi=15.12
|terminus_a=[[Connecticut Route 72|Route 72]]/East Main Street in [[Plainville, Connecticut|Plainville]]
|terminus_b=[[Connecticut Route 99|Route 99]] in [[Cromwell, Connecticut|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]], [[Litchfield Hills|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 ===
[[File:ct trunklines.jpg|right|thumb|The 14 trunk line routes of the original state highway system of Connecticut]]
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 in Connecticut|U.S. Route 1]]
* Route 2: north-south from Stamford to Salisbury, roughly modern [[Connecticut Route 106|Route 106]], [[Connecticut Route 33|Route 33]], [[Connecticut Route 35|Route 35]], [[U.S. Route 7 in Connecticut|U.S. Route 7]], [[Connecticut Route 341|Route 341]], [[Connecticut Route 41|Route 41]]
* Route 3: north-south from Norwalk to North Canaan, roughly modern [[U.S. Route 7 in Connecticut|U.S. Route 7]], [[Connecticut Route 107|Route 107]], [[Connecticut Route 53|Route 53]], [[Connecticut Route 37|Route 37]], [[U.S. Route 202 in Connecticut|U.S. Route 202]], [[Connecticut Route 45|Route 45]], [[U.S. Route 7 in Connecticut|U.S. Route 7]]
* Route 4: north-south from Bridgeport to Colebrook, roughly modern [[Connecticut Route 8|Route 8]]
* Route 5: north-south from New Haven to Suffield via Cheshire (concurrent with Route 6 north of Hartford), roughly modern [[Connecticut Route 10|Route 10]], [[Connecticut Route 4|Route 4]], [[Connecticut Route 159|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 in Connecticut|U.S. Route 5]], [[Connecticut Route 71|Route 71]], [[Connecticut Route 159|Route 159]]
* Route 7: north-south from New Haven to Enfield via Middletown, roughly modern [[Connecticut Route 17|Route 17]], [[Connecticut Route 99|Route 99]], [[U.S. Route 5 in Connecticut|U.S. Route 5]]
* Route 8: north-south from Old Saybrook to Hartford, roughly modern [[Connecticut Route 9|Route 9]], [[Connecticut Route 99|Route 99]]
* Route 9: north-south from New London to Colebrook, roughly modern [[Connecticut Route 85|Route 85]], [[Connecticut Route 2|Route 2]], [[Connecticut Route 189|Route 189]], [[Connecticut Route 20|Route 20]]
* Route 10: north-south from New London to Thompson, roughly modern [[Connecticut Route 32|Route 32]], [[Connecticut Route 169|Route 169]], [[Connecticut Route 12|Route 12]], [[Connecticut Route 193|Route 193]]
* Route 11: north-south from Stonington to Woodstock, roughly modern [[Connecticut Route 2|Route 2]], [[Connecticut Route 32|Route 32]], [[U.S. Route 6 in Connecticut|U.S. Route 6]], [[Connecticut Route 198|Route 198]]
* Route 12: east-west from Salisbury to Putnam, roughly Twin Lakes Road, modern [[U.S. Route 44 in Connecticut|U.S. Route 44]]
* Route 13: east-west from [[Kent, Connecticut|Kent]] to [[Sterling, Connecticut|Sterling]], roughly modern [[Connecticut Route 341|Route 341]], [[U.S. Route 202 in Connecticut|U.S. Route 202]], [[Connecticut Route 118|Route 118]], [[Connecticut Route 4|Route 4]], [[U.S. Route 6 in Connecticut|U.S. Route 6]], [[Connecticut Route 14|Route 14]]
* Route 14: east-west from [[Sherman, Connecticut|Sherman]] to [[Killingly, Connecticut|Killingly]], roughly [[Connecticut Route 37|Route 37]], [[Connecticut Route 67|Route 67]], [[Connecticut Route 317|Route 317]], [[Connecticut Route 64|Route 64]], [[Connecticut Route 322|Route 322]], [[Connecticut Route 66|Route 66]], [[U.S. Route 6 in Connecticut|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 [[U.S. Route 1 in Connecticut|1]], [[Route 2 (New England)|2]], [[Route 3 (New England)|3]], [[Route 4 (New England)|4]], [[Route 8 (New England)|8]], [[Route 10 (New England)|10]], [[Route 12 (New England)|12]], [[Route 17 (New England)|17]], and [[Route 32 (New England)|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 road marking system|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]])
* [https://web.archive.org/web/20030523012409/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}}
[[Category:Lists of roads in Connecticut|State Routes]]
[[Category:State highways in Connecticut|*State Routes]]
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