List of State Routes in Connecticut

State Routes in Connecticut
Standard Connecticut route shields
System information
Length:	3,719 mi (5,985 km)
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 ConnDOT.
Highway names
Interstates:	I-X or Route X
US Highways:	US X or Route X
State:	Route X
System links
Routes in Connecticut Interstate U.S. State SSR SR

The Connecticut Department of Transportation (ConnDOT) 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 ConnDOT map and highway log. As of January 1, 2007, the state highway system contains a total of 3,719 miles (5,985 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. All interstate highways and U.S. highways in the state are part of the state highway system.

All state highways are given a number designation. Most state highways are assigned Route numbers (including U.S. highways and interstates). Route numbers are in the 1-399 range, with the exception of Interstates 684 and 691. State highways that are special service roads are assigned SSR numbers and are unsigned. SSR numbers are in the 400-499 range. Another set of unsigned state highways are called State Roads and are given SR numbers. These state roads are either feeder roads that interconnect state highways together, or long entry/exit ramps to freeways (often called connector roads). SR numbers are in the 500-999 range. 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.

Number	Length (mi)[1]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
Route 2	58.03	93.39	Columbus Boulevard in Hartford	US 1 in Stonington	—	—
Route 2A	9.91	15.95	I-395 / Route 2 / Route 32 in Norwich	Route 2 in Preston	—	—
Route 3	14.48	23.30	Route 66 in Middletown	Route 2 in East Hartford	—	—
Route 4	46.72	75.19	Route 41 / Route 343 in Sharon	Farmington Avenue in West Hartford	—	—
Route 8	67.36	108.41	I-95 in Bridgeport	MA 8 in Colebrook	—	—
Route 9	40.89	65.81	I-95 in Old Saybrook	I-84 in West Hartford	—	—
Route 10	54.28	87.36	I-95 in New Haven	US 202 / MA 10 in Granby	—	—
Route 11	7.42	11.94	Route 82 in Salem	Route 2 in Colchester	—	—	Length includes only completed portion
Route 12	54.46	87.64	US 1 in Groton	MA 12 in Thompson	—	—
Route 14	24.33	39.16	Route 66 in Windham	RI 14 in Sterling	—	—
Route 14A	10.27	16.53	Route 14 in Plainfield	Route 14 in Sterling	—	—
Route 15	83.53	134.43	Hutchinson River Parkway at the New York state line in Greenwich	I-84 in East Hartford	—	—	Includes Merritt Parkway, Wilbur Cross Parkway, Berlin Turnpike, and Wilbur Cross Highway
Route 16	17.05	27.44	Route 66 in East Hampton	Route 207 in Lebanon	—	—
Route 17	36.41	58.60	Middletown Avenue in New Haven	Route 2 in Glastonbury	—	—
Route 17A	3.02	4.86	Route 17 / Route 66 in Portland	Route 17 in Portland	—	—
Route 19	6.99	11.25	Route 190 in Stafford	MA 19 in Stafford	—	—
Route 20	31.56	50.79	Route 8 in Winchester	I-91 in Windsor	—	—	Includes part of Bradley Airport Connector
Route 21	5.67	9.12	Route 12 in Killingly	Route 193 in Thompson	—	—
Route 22	14.07	22.64	Route 10 in Hamden	US 1 in Guilford	—	—
Route 25	28.59	46.01	I-95 in Bridgeport	US 202 in Brookfield	—	—
Route 27	3.21	5.17	US 1 in Stonington	Route 184 in Groton	—	—
Route 30	20.94	33.70	I-291 / US 5 in South Windsor	Route 190 in Stafford	—	—
Route 31	14.34	23.08	Route 74 in Vernon	Route 32 in Mansfield	—	—
Route 32	54.88	88.32	Crystal Avenue (SSR 437) in New London	MA 32 in Stafford	—	—
Route 33	14.41	23.19	I-95 / Route 136 in Westport	Route 35 in Ridgefield	—	—
Route 34	24.37	39.22	Washington Street in Newtown	I-91 / I-95 in New Haven	—	—
Route 35	5.66	9.11	NY 35 in Ridgefield	US 7 in Ridgefield	—	—
Route 37	18.66	30.03	Route 39 / Route 53 / Downs Street (SR 841) in Danbury	US 7 in New Milford	—	—
Route 39	22.76	36.63	Route 37 / Route 53 / Downs Street (SR 841) in Danbury	Route 55 in Sherman	—	—
Route 40	3.08	4.96	I-91 in North Haven	Route 10 in Hamden	—	—
Route 41	17.86	28.74	Amenia Union Road at the New York state line in Sharon	MA 41 in Salisbury	—	—
Route 42	13.66	21.98	Route 67 in Oxford	Route 10 in Cheshire	—	—
Route 43	5.06	8.14	Route 4 / Route 128 in Cornwall	Route 63 in Cornwall	—	—
Route 45	10.29	16.56	US 202 in Washington	US 7 in Cornwall	—	—
Route 47	12.27	19.75	US 6 in Woodbury	US 202 in Washington	—	—
Route 49	21.74	34.99	Route 2 in Stonington	Route 14A in Sterling	—	—
Route 53	23.57	37.93	US 1 in Norwalk	Route 37 / Route 39 / Downs Street (SR 841) in Danbury	—	—
Route 55	2.64	4.25	NY 55 in Sherman	US 7 in New Milford	—	—
Route 57	9.51	15.30	Route 33 in Westport	US 7 in Wilton	—	—
Route 58	18.58	29.90	US 1 in Fairfield	Route 302 in Bethel	—	—
Route 59	12.05	19.39	US 1 in Bridgeport	Route 25 in Monroe	—	—
Route 61	9.16	14.74	US 6 in Woodbury	Route 63 in Morris	—	—
Route 63	52.57	84.60	Route 10 in New Haven	US 7 in Canaan	—	—
Route 64	8.14	13.10	US 6 in Woodbury	I-84 in Waterbury	—	—
Route 66	38.38	61.77	I-91 / I-691 in Meriden	US 6 in Windham	—	—
Route 67	31.00	49.89	US 7 / US 202 in New Milford	Route 63 in Woodbridge	—	—
Route 68	22.09	35.55	Route 63 in Naugatuck	Route 17 in Durham	—	—
Route 69	35.16	56.58	Route 63 in New Haven	Route 4 in Burlington	—	—
Route 70	10.92	17.57	I-84 / Waterbury Road (SR 801) in Cheshire	Route 71 in Meriden	—	—
Route 71	19.19	30.88	US 5 in Wallingford	Route 173 in West Hartford	—	—
Route 71A	2.92	4.70	Route 71 in Berlin	Buell Street in New Britain	—	—
Route 72	20.05	32.27	Route 9 in New Britain	Route 4 in Harwinton	—	—
Route 73	3.46	5.57	Route 63 in Watertown	Route 8 in Waterbury	—	—
Route 74	22.21	35.74	Route 194 in South Windsor	US 44 in Ashford	—	—
Route 75	13.52	21.76	Route 159 in Windsor	MA 75 in Suffield	—	—
Route 77	13.85	22.29	Route 146 in Guilford	Route 17 in Durham	—	—
Route 78	0.43	0.69	Route 2 in Stonington	RI 78 in Stonington	—	—
Route 79	14.34	23.08	US 1 in Madison	Route 17 in Durham	—	—
Route 80	25.91	41.70	Route 17 in New Haven	Route 154 in Deep River	—	—
Route 81	15.75	25.35	US 1 in Clinton	Route 154 in Haddam	—	—
Route 82	28.47	45.82	Route 9 in Chester	Route 2 / Route 32 in Norwich	—	—
Route 83	27.56	44.35	New London Turnpike in Glastonbury	MA 83 in Somers	—	—
Route 85	37.38	60.16	US 1 in New London	US 6 / US 44 / Cider Mill Road (SR 533) in Bolton	—	—
Route 87	16.62	26.75	Route 32 in Franklin	US 6 in Andover	—	—
Route 89	16.25	26.15	Route 195 in Mansfield	Route 190 in Union	—	—
Route 94	9.33	15.02	Route 2 in Glastonbury	Route 85 in Hebron	—	—
Route 97	29.14	46.90	Route 12 in Norwich	US 44 / Route 169 in Pomfret	—	—
Route 99	10.64	17.12	Route 9 in Cromwell	Wethersfield Avenue at Wethersfield–Hartford town line	—	—
Route 100	4.40	7.08	US 1 in East Haven	Route 80 in East Haven	—	—
Route 101	9.46	15.22	US 44 in Pomfret	RI 101 in Killingly	—	—
Route 102	3.45	5.55	Route 35 in Ridgefield	US 7 in Ridgefield	—	—
Route 103	5.31	8.55	Route 80 in New Haven	US 5 / Route 22 in North Haven	—	—
Route 104	6.82	10.98	Route 137 in Stamford	Long Ridge Road at the New York state line in Stamford	—	—
Route 106	14.37	23.13	I-95 / US 1 in Stamford	Route 53 in Wilton	—	—
Route 107	7.50	12.07	US 7 in Wilton	Route 58 in Redding	—	—
Route 108	11.05	17.78	US 1 in Stratford	Route 110 in Shelton	—	—
Route 109	20.93	33.68	US 202 in New Milford	US 6 in Thomaston	—	—
Route 110	15.95	25.67	US 1 in Stratford	Route 111 in Monroe	—	—
Route 111	11.71	18.85	Route 15 / Main Street (SR 731) in Trumbull	Route 34 in Monroe	—	—
Route 112	6.68	10.75	US 44 in Salisbury	US 7 in Salisbury	—	—
Route 113	8.12	13.07	I-95 in Bridgeport	Route 110 in Stratford	—	—
Route 114	7.92	12.75	US 1 in Orange	Route 63 in Woodbridge	—	—
Route 115	5.66	9.11	Route 34 in Derby	Route 67 in Seymour	—	—
Route 116	4.24	6.82	Route 35 in Ridgefield	NY 116 in Ridgefield	—	—
Route 117	11.32	18.22	US 1 in Groton	Route 2 in Preston	—	—
Route 118	7.48	12.04	Route 63 in Litchfield	Route 4 in Harwinton	—	—
Route 120	3.11	5.01	Route 322 in Southington	Route 10 in Southington	—	—
Route 121	5.66	9.11	US 1 in Milford	Route 34 in Orange	—	—
Route 122	3.51	5.65	I-95 / First Avenue (SR 745) in West Haven	Route 63 in New Haven	—	—
Route 123	8.37	13.47	US 1 in Norwalk	NY 123 in New Canaan	—	—
Route 124	9.41	15.14	US 1 in Darien	Westchester Avenue at the New York state line in New Canaan	—	—
Route 125	1.24	2.00	Route 4 in Cornwall	Route 128 in Cornwall	—	—
Route 126	6.08	9.78	Route 63 in Canaan	US 44 in North Canaan	—	—
Route 127	6.80	10.94	Route 130 in Bridgeport	Route 111 in Trumbull	—	—
Route 128	4.03	6.49	US 7 in Sharon	Route 4 / Route 43 in Cornwall	—	—
Route 130	8.21	13.21	US 1 in Fairfield	US 1 in Stratford	—	—
Route 131	3.78	6.08	Route 12 in Thompson	MA 131 in Thompson	—	—
Route 132	10.97	17.65	Route 47 in Woodbury	Route 63 in Watertown	—	—
Route 133	20.05	32.27	US 202 in Brookfield	Route 67 in Bridgewater	—	—
Route 135	2.58	4.15	US 1 in Fairfield	Route 58 in Fairfield	—	—
Route 136	20.46	32.93	US 1 in Darien	Route 59 in Easton	—	—
Route 137	9.33	15.02	US 1 / Washington Boulevard (SSR 493) in Stamford	NY 137 in Stamford	—	—
Route 138	17.73	28.53	Route 97 in Sprague	RI 138 in Voluntown	—	—
Route 139	2.38	3.83	US 1 in Branford	Route 22 / Route 80 in North Branford	—	—
Route 140	22.50	36.21	Route 75 in Windsor Locks	Route 32 / Route 190 in Stafford	—	—
Route 142	4.27	6.87	US 1 in East Haven	US 1 in Branford	—	—
Route 145	9.91	15.95	US 1 in Clinton	Route 148 in Chester	—	—
Route 146	13.00	20.92	US 1 in Branford	US 1 in Guilford	—	—
Route 147	5.09	8.19	Route 17 in Durham	Route 66 in Middlefield	—	—
Route 148	16.35	26.31	Route 79 in Killingworth	Route 82 in Lyme	—	—
Route 149	11.70	18.83	Route 82 in East Haddam	Old Hartford Road in Colchester	—	—
Route 150	9.04	14.55	Route 22 in North Branford	US 5 in Wallingford	—	—
Route 151	10.77	17.33	Route 82 in East Haddam	Route 66 in East Hampton	—	—
Route 152	3.31	5.33	US 1 in Orange	Route 34 in Orange	—	—
Route 153	5.27	8.48	US 1 in Westbrook	Route 154 in Essex	—	—
Route 154	28.24	45.45	US 1 in Old Saybrook	Route 9 in Middletown	—	—
Route 155	2.22	3.57	Route 17 in Middletown	Route 9 in Middletown	—	—
Route 156	22.76	36.63	Route 82 in East Haddam	US 1 in Waterford	—	—
Route 157	6.86	11.04	Route 68 in Durham	Route 66 in Middletown	—	—
Route 159	16.82	27.07	Main Street at Hartford–Windsor town line	MA 159 in Suffield	—	—
Route 160	7.36	11.84	US 5 / Route 15 in Berlin	Route 17 in Glastonbury	—	—
Route 161	8.03	12.92	Route 156 in East Lyme	Route 85 in Montville	—	—
Route 162	20.05	32.27	US 1 in Milford	US 1 in Orange	—	—
Route 163	12.86	20.70	Route 32 in Montville	Route 2 / Haughton Road (SR 612) in Bozrah	—	—
Route 164	7.83	12.60	Route 2 in Preston	Route 138 in Griswold	—	—
Route 165	16.01	25.77	Route 2 in Norwich	RI 165 in Voluntown	—	—
Route 166	1.62	2.61	Route 153 in Westbrook	US 1 in Old Saybrook	—	—
Route 167	10.41	16.75	Route 4 in Farmington	US 202 / Route 10 in Simsbury	—	—
Route 168	7.93	12.76	MA 168 in Suffield	Route 75 in Suffield	—	—
Route 169	38.25	61.56	Route 2 / Route 32 / Town Street (SR 642) in Norwich	MA 169 in Woodstock	—	—
Route 171	20.70	33.31	I-84 in Union	US 44 in Putnam	—	—
Route 172	4.45	7.16	I-84 in Southbury	Route 67 in Southbury	—	—
Route 173	6.17	9.93	US 5 / Route 15 in Newington	South Main Street in West Hartford	—	—
Route 174	3.18	5.12	Route 71 in New Britain	Route 176 in Newington	—	—
Route 175	6.19	9.96	Route 71 in New Britain	Route 99 in Wethersfield	—	—
Route 176	4.14	6.66	US 5 / Route 15 in Newington	Newington Avenue at Newington–Hartford town line	—	—
Route 177	12.57	20.23	Route 10 in Plainville	US 44 in Canton	—	—
Route 178	6.89	11.09	Route 185 in Bloomfield	Route 159 in Windsor	—	—
Route 179	16.50	26.55	Route 4 in Burlington	Route 20 in Hartland	—	—
Route 181	7.84	12.62	US 44 in Barkhamsted	Route 20 in Hartland	—	—
Route 182	3.81	6.13	US 44 in Norfolk	Route 182A / Route 183 in Colebrook	—	—
Route 182A	2.09	3.36	Route 182 in Colebrook	Route 182 / Route 183 in Colebrook	—	—
Route 183	19.06	30.67	Route 4 in Torrington	MA 183 in Norfolk	—	—
Route 184	15.66	25.20	I-95 in Groton	Route 216 / Providence–New London Turnpike (SR 626) in North Stonington	—	—
Route 185	6.36	10.24	US 202 / Route 10 in Simsbury	Route 189 in West Hartford	—	—
Route 186	3.57	5.75	Route 190 in Somers	MA 186 in Somers	—	—
Route 187	19.74	31.77	US 44 in Hartford	MA 187 in Suffield	—	—
Route 188	15.92	25.62	Route 34 in Seymour	Route 63 in Middlebury	—	—
Route 189	20.32	32.70	US 44 in Hartford	MA 189 in Granby	—	—
Route 190	28.27	45.50	Route 75 in Suffield	Route 171 in Union	—	—
Route 191	9.30	14.97	US 5 in East Windsor	Route 190 in Enfield	—	—
Route 192	3.49	5.62	Route 190 in Enfield	MA 192 in Enfield	—	—
Route 193	6.63	10.67	Route 12 in Thompson	Route 193 in Thompson	—	—
Route 194	3.67	5.91	US 5 in South Windsor	Route 30 in South Windsor	—	—
Route 195	15.91	25.60	Route 66 in Windham	Route 74 in Tolland	—	—
Route 196	5.38	8.66	Route 151 in Haddam	Route 66 in East Hampton	—	—
Route 197	10.97	17.65	Route 171 in Union	MA 197 in Thompson	—	—
Route 198	19.22	30.93	US 6 in Chaplin	MA 198 in Woodstock	—	—
Route 199	4.62	7.44	Route 67 in Roxbury	Route 47 in Washington	—	—
Route 200	1.87	3.01	Route 12 in Thompson	Route 193 in Thompson	—	—
Route 201	20.10	32.35	Route 184 in Stonington	Route 12 in Griswold	—	—
Route 203	5.32	8.56	Route 32 in Windham	US 6 in Windham	—	—
Route 205	3.81	6.13	Route 12 in Plainfield	Route 169 in Brooklyn	—	—
Route 207	16.01	25.77	Route 85 in Hebron	Route 97 in Sprague	—	—
Route 209	2.93	4.72	Route 109 in Morris	US 202 in Litchfield	—	—
Route 213	6.66	10.72	Route 156 in Waterford	US 1 in New London	—	—
Route 214	7.30	11.75	Route 12 in Ledyard	Route 2 / Foxwoods Boulevard (SR 680) in Ledyard	—	—
Route 215	4.65	7.48	US 1 in Groton	US 1 in Groton	—	—
Route 216	2.78	4.47	Route 49 in North Stonington	RI 216 in North Stonington	—	—
Route 217	3.84	6.18	Route 66 in Middlefield	Route 372 in Cromwell	—	—
Route 218	7.00	11.27	US 44 in West Hartford	Route 159 in Windsor	—	—
Route 219	14.98	24.11	US 202 in New Hartford	Route 20 in Granby	—	—
Route 220	5.80	9.33	US 5 in Enfield	MA 220 in Enfield	—	—
Route 222	8.08	13.00	US 6 in Thomaston	Route 118 in Harwinton	—	—
Route 229	5.94	9.56	West Street in Southington	US 6 in Bristol	—	—
Route 234	6.95	11.18	Route 27 in Stonington	US 1 in Stonington	—	—
Route 243	6.70	10.78	Route 115 / Division Street (SR 853) in Ansonia	Route 63 in New Haven	—	—
Route 244	5.72	9.21	Route 198 in Eastford	Route 97 in Pomfret	—	—
Route 254	8.41	13.53	Route 8 / Waterbury Road (SR 848) in Thomaston	Route 118 in Litchfield	—	—
Route 262	9.37	15.08	US 6 in Watertown	US 6 in Plymouth	—	—
Route 263	6.23	10.03	Route 272 in Goshen	US 44 in Winchester	—	—
Route 272	17.97	28.92	Route 4 in Torrington	Norfolk Road at the Massachusetts state line in Norfolk	—	—
Route 275	4.15	6.68	Route 31 in Coventry	Route 195 in Mansfield	—	—
Route 286	3.60	5.79	Route 74 in Ellington	Route 83 in Ellington	—	—
Route 287	3.36	5.41	Route 176 in Newington	Route 3 in Wethersfield	—	—
Route 289	5.13	8.26	Route 87 in Lebanon	Route 32 in Windham	—	—
Route 302	7.96	12.81	Route 53 in Bethel	Route 25 in Newtown	—	—
Route 305	3.42	5.50	Route 187 in Bloomfield	Route 75 in Windsor	—	—
Route 309	4.74	7.63	Route 179 in Canton	Route 167 in Simsbury	—	—
Route 313	6.85	11.02	Route 67 in Seymour	Route 243 in Woodbridge	—	—
Route 314	2.07	3.33	US 5 / Route 15 in Wethersfield	Route 99 in Wethersfield	—	—
Route 315	1.95	3.14	US 202 / Route 10 in Simsbury	Route 189 in Simsbury	—	—
Route 316	6.04	9.72	Route 66 in Hebron	US 6 in Andover	—	—
Route 317	6.10	9.82	Route 67 in Roxbury	US 6 in Woodbury	—	—
Route 318	3.14	5.05	US 44 in Barkhamsted	Route 219 in Barkhamsted	—	—
Route 319	2.83	4.55	Route 190 in Stafford	Route 19 in Stafford	—	—
Route 320	7.05	11.35	Route 195 in Mansfield	I-84 in Willington	—	—
Route 322	9.80	15.77	Route 69 in Wolcott	I-691 in Southington	—	—
Route 334	4.40	7.08	Route 188 in Seymour	Route 115 in Ansonia	—	—
Route 337	4.91	7.90	US 1 in New Haven	Route 142 in East Haven	—	—
Route 341	15.97	25.70	Bog Hollow Road at the New York state line in Kent	US 202 in Washington	—	—
Route 343	1.50	2.41	NY 343 in Sharon	Route 4 / Route 41 in Sharon	—	—
Route 349	4.17	6.71	Shennecossett Road in Groton	I-95 in Groton	—	—
Route 354	7.37	11.86	Route 85 in Colchester	Route 82 in Salem	—	—
Route 361	3.54	5.70	Route 41 in Sharon	Sharon Road at the New York state line in Salisbury	—	—
Route 364	4.56	7.34	Route 120 in Southington	Route 71 in Berlin	—	—
Route 372	15.12	24.33	East Main Street at Bristol–Plainville town line	Route 99 in Cromwell	—	—

Special Service Roads

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.

Number	Length (mi)[1]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
SSR 401	2.29	3.69	Route 20 in Windsor Locks	Route 75 in Windsor Locks	—	—	Bradley Airport Connector
SSR 403	1.09	1.75	One-way loop access road between Bradley Airport Connector (SSR 401) and Bradley International Airport terminal in Windsor Locks		—	—
SSR 404	0.81	1.30	Route 220 in Enfield	Willard-Cybulski Correctional Institution	—	—	Shaker Road, Bilton Road
SSR 405	0.47	0.76	Route 175 in Newington	Hartford Regional Center	—	—	Patricia M. Genova Drive
SSR 410	2.28	3.67	Route 154 in Middletown	Pratt & Whitney Aircraft Plant	—	—	Aircraft Road
SSR 411	1.98	3.19	Route 3 in Rocky Hill	Route 99 in Rocky Hill	—	—	Serves Dinosaur State Park and Arboretum
SSR 422	0.31	0.50	Route 99 in Wethersfield	Hartford Avenue in Wethersfield	—	—	Nott Street
SSR 423	0.31	0.50	South Road in Farmington	State Highway Garage	—	—
SSR 424	0.86	1.38	Route 175 in Wethersfield	Road end	—	—	Russell Road
SSR 426	0.20	0.32	Route 14 in Plainfield	Quinebaug Valley Fish Hatchery	—	—	Russell Road
SSR 429	0.67	1.08	Route 149 in Colchester	Day Pond State Park	—	—
SSR 430	0.86	1.38	Route 195 in Mansfield	North Eagleville Road in Mansfield	—	—	Serves University of Connecticut
SSR 431	2.39	3.85	Route 148 in Lyme	Route 82 in East Haddam	—	—	Serves Gillette Castle State Park
SSR 432	0.54	0.87	US 1 in East Lyme	Stone's Ranch Military Reservation	—	—
SSR 433	1.28	2.06	Route 32 in Montville	Fort Shantok Archeological District	—	—
SSR 434	10.13	16.30	Route 82 in East Haddam	Route 82 in East Haddam	—	—	Serves Devil's Hopyard State Park
SSR 435	0.21	0.34	US 6 in Killingly	Old Furnace State Park	—	—
SSR 437	0.44	0.71	Route 32 in New London	State Pier	—	—	Crystal Avenue
SSR 438	2.90	4.67	US 44 in Putnam	Quaddick Town Farm Road in Thompson	—	—
SSR 439	0.56	0.90	Route 151 in East Hampton	Hurd Park Road in East Haddam	—	—	Serves Hurd State Park
SSR 449	1.07	1.72	Route 156 in East Lyme	I-95 in East Lyme	—	—	Rocky Neck Connector; serves Rocky Neck State Park
SSR 450	4.46	7.18	US 1 in Madison	Route 79 in Madison	—	—	Hammonasset Connector, Duck Hole Road, Horse Pond Road; serves Hammonasset Beach State Park
SSR 453	0.32	0.51	Route 10 in Hamden	Mount Carmel Avenue in Hamden	—	—	Serves Sleeping Giant State Park
SSR 454	1.89	3.04	Route 110 in Shelton	Birchbank Road in East Haddam	—	—	Serves Indian Well State Park
SSR 476	1.41	2.27	Sherwood Island State Park in Westport	US 1 in Westport	—	—	Sherwood Island Connector
SSR 478	6.08	9.78	Route 45 in Washington	Route 45 in Warren	—	—	Serves Lake Waramaug State Park
SSR 479	0.25	0.40	US 202 in Washington	Mount Tom State Park	—	—
SSR 480	0.77	1.24	Route 4 in Cornwall	Great Hollow Road in Cornwall	—	—	Serves Mohawk Mountain State Park
SSR 481	0.28	0.45	Route 39 in New Fairfield	Squantz Pond State Park	—	—
SSR 482	4.11	6.61	Route 181 / Route 318 in Barkhamsted	Route 20 in Barkhamsted	—	—	Serves Peoples State Forest
SSR 483	0.49	0.79	Winsted Road (SR 800) in Torrington	Burr Pond State Park	—	—
SSR 485	1.17	1.88	Route 4 in Torrington	University of Connecticut, Torrington campus	—	—	University Drive
SSR 486	1.08	1.74	Route 188 in Southbury	Waterbury–Oxford Airport in Oxford	—	—
SSR 487	4.24	6.82	Route 67 in Southbury	Kettletown State Park	—	—
SSR 488	0.90	1.45	Route 20 in Hartland	Mill Street	—	—	Serves Tunxis State Forest
SSR 489	0.17	0.27	Route 4 in Burlington	Connecticut State Fish Hatchery	—	—
SSR 490	1.10	1.77	Route 34 in Newtown	Garner Correctional Institution	—	—	Nunnawauk Road, Wasserman Way; provides access to I-84
SSR 492	0.24	0.39	US 6 / Route 67 in Southbury	State Highway Garage	—	—
SSR 493	0.34	0.55	Station Place in Stamford	US 1 / Route 137 in Stamford	—	—	Washington Boulevard; serves Stamford Transportation Center

State Roads

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

Number	Length (mi)[1]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
Route 500	0.51	0.82	I-84 / US 6 / Route 2 in East Hartford	Governor Street in East Hartford	—	—
Route 501	0.77	1.24	I-84 / US 6 in West Hartford	Park Road in West Hartford	—	—	Trout Brook Connector
Route 502	6.31	10.15	Route 2 in East Hartford	US 6 / US 44 in Manchester	—	—	East River Drive Extended, Silver Lane, Spencer Street
Route 503	0.68	1.09	Sisson Avenue in Hartford	I-84 / US 6 in Hartford	—	—	Sisson Avenue Connector
Route 504	0.70	1.13	Flatbush Avenue in Hartford	I-84 / US 6 in Hartford	—	—
Route 505	0.53	0.85	Route 175 in Newington	Route 9 in Newington	—	—	Fenn Road
Route 508	1.82	2.93	Route 4 in Farmington	I-84 / US 6 in Farmington	—	—
Route 509	0.51	0.82	Route 322 in Southington	Route 10 in Southington	—	—	Clark Street
Route 510	2.55	4.10	US 5 in East Windsor	US 5 in Enfield	—	—	Main Street, Depot Hill Road
Route 511	0.38	0.61	Route 10 in Plainville	Route 72 in Plainville	—	—	Hooker Street
Route 513	0.67	1.08	Route 75 in Suffield	End state maintenance	—	—	Bridge Street
Route 514	0.20	0.32	US 5 in Enfield	Route 190 / Pearl Street in Enfield	—	—	Franklin Street
Route 515	0.20	0.32	Pearl Street in Enfield	US 5 / Route 190 in Enfield	—	—	Frew Terrace
Route 516	0.18	0.29	Route 2 in East Hartford	Main Street (SR 517) in East Hartford	—	—	Willow Street Extended
Route 517	1.24	2.00	Route 2 in East Hartford	US 5 / Route 15 in East Hartford	—	—	Main Street, High Street
Route 518	0.45	0.72	Silver Lane (SR 502) in East Hartford	I-84 / US 6 in East Hartford	—	—	Roberts Street
Route 524	0.31	0.50	Route 3 in Cromwell	Route 372 in Cromwell	—	—	Berlin Road
Route 526	1.66	2.67	Route 187 in Suffield	Route 168 in Suffield	—	—	Sheldon Street
Route 527	2.05	3.30	Route 30 in Vernon	Route 74 / Route 83 in Vernon	—	—	West Street
Route 526	2.59	4.17	Route 190 in Somers	Route 83 in Somers	—	—	Turnpike Road
Route 529	1.33	2.14	Route 173 in West Hartford	Newington Avenue in Hartford	—	—	New Britain Avenue
Route 530	0.58	0.93	Wethersfield Avenue in Hartford	Brainard Road in Hartford	—	—	Airport Road
Route 531	1.39	2.24	Route 4 in Farmington	I-84 / US 6 in Farmington	—	—	South Road, Colt Highway
Route 532	0.44	0.71	Route 177 in Plainville	Route 10 in Southington	—	—	Washington Street, Birch Street
Route 533	4.03	6.49	US 6 / US 44 / Route 85 in Bolton	Route 30 in Vernon	—	—	Cider Mill Road, Tunnel Road
Route 534	4.45	7.16	Route 83 in Manchester	Route 85 in Bolton	—	—	Charter Oak Street, Highland Street
Route 535	0.21	0.34	Route 71 in West Hartford	I-84 / US 6 in West Hartford	—	—	Ridgewood Road
Route 536	1.53	2.46	Route 372 in Plainville	Route 372 in Plainville	—	—	Pine Street, Woodford Avenue, Crooked Street
Route 539	3.70	5.95	Route 20 in Hartland	Route 189 in Granby	—	—	Mountain Road
Route 540	1.43	2.30	Route 189 in East Granby	Route 187 in East Granby	—	—	Hatchett Hill Road
Route 541	0.82	1.32	Tunnel Road (SR 533) in Vernon	Route 30 in Vernon	—	—	South Frontage Road, Bolton Road
Route 542	0.30	0.48	Tunnel Road (SR 533) in Vernon	Bolton Road (SR 541) in Vernon	—	—	Ferguson Road
Route 543	0.38	0.61	Route 314 in Wethersfield	Maple Avenue at Wethersfield–Hartford town line	—	—	Berlin Turnpike
Route 545	0.15	0.24	Route 66 in Middletown	Route 9 / Route 17 in Middletown	—	—	Washington Street
Route 549	1.14	1.83	US 6 in Farmington	South Road (SR 531) in Farmington	—	—	Birdseye Road
Route 552	0.23	0.37	US 6 in Farmington	Route 10 in Farmington	—	—	Scott Swamp Road
Route 555	1.30	2.09	Route 372 in New Britain	Main Street in New Britain	—	—	West Main Street
Route 565	1.73	2.78	Route 179 in Canton	US 44 in Canton	—	—	Maple Avenue
Route 569	0.17	0.27	I-91 in Windsor Locks	Route 159 in Windsor Locks	—	—	Lawnacre Road
Route 571	1.52	2.45	Route 71A / Route 372 in Berlin	Route 9 in Berlin	—	—
Route 572	0.48	0.77	Route 9 in Berlin	US 5 / Route 15 in Berlin	—	—	Frontage Road, Worthington Ridge Road
Route 585	1.25	2.01	Route 168 in Suffield	Pointgrove Road at the Massachusetts state line in Suffield	—	—	Babbs Road
Route 597	0.58	0.93	Route 10 in Southington	I-84 in Southington	—	—
Route 598	0.76	1.22	Pulaski Circle in Hartford	I-91 in Hartford	—	—	Whitehead Highway
Route 600	0.67	1.08	Route 138 in Lisbon	Route 169 in Lisbon	—	—	Kinsman Hill Road
Route 602	3.28	5.28	Route 154 in Essex	Route 80 in Deep River	—	—	Main Street, Warsaw Street
Route 603	3.54	5.70	Route 85 in Hebron	Route 316 in Andover	—	—	London Road, Boston Hill Road
Route 604	0.80	1.29	Route 153 in Essex	Main Street (SR 602) in in Essex	—	—	Westbrook Road
Route 605	0.30	0.48	Route 165 in Preston	Route 164 in Preston	—	—	Old Shetucket Turnpike
Route 607	2.54	4.09	Route 12 in Killingly	US 6 in Killingly	—	—	Westcott Road
Route 608	4.32	6.95	Norwich Avenue (SR 616) / McGrath Lane in Lebanon	Fitchville Road at Bozrah–Norwich town line	—	—	Norwich Avenue, Fitchville Road
Route 609	0.97	1.56	Route 151 in East Haddam	Route 149 in East Haddam	—	—	Leesville Road
Route 610	2.16	3.48	Route 32 in Franklin	Route 207 in Franklin	—	—	Baltic Road
Route 612	0.14	0.23	Route 163 in Bozrah	Fitchville Road (SR 608) in Bozrah	—	—	Haughton Road
Route 614	2.63	4.23	US 1 in Groton	Route 184 in Groton	—	—	Allyn Street, Mystic Street, Cow Hill Road
Route 615	1.32	2.12	Route 2 in Colchester	Route 85 in Colchester	—	—	Old Hartford Road, Broadway
Route 616	6.83	10.99	Route 85 in Colchester	Road end in Lebanon	—	—	Norwich Avenue, McGrath Lane
Route 617	0.85	1.37	I-95 / Route 2 in North Stonington	Route 49 in North Stonington	—	—
Route 618	0.69	1.11	Westcott Road (SR 607) in Killingly	US 6 in Killingly	—	—	North Frontage Road
Route 619	0.49	0.79	I-395 in Killingly	Westcott Road (SR 607) in Killingly	—	—	Gauthier Avenue
Route 620	0.31	0.50	Route 171 in Union	End state maintenance	—	—	Mashapaug Road
Route 621	0.10	0.16	Route 9 / Route 153 in Essex	Route 154 in Essex	—	—
Route 623	1.23	1.98	One-way frontage road along southbound I-95 in New London and Waterford		—	—	North Frontage Road, Parkway North
Route 624	0.60	0.97	I-95 in Waterford	US 1 in New London	—	—	Parkway South, South Frontage Road
Route 625	0.99	1.59	US 1 in Westbrook	Route 145 in Westbrook	—	—	Grove Beach Road
Route 626	0.25	0.40	Route 216 / Route 184 in North Stonington	Rhode Island state line	—	—	Providence New London Turnpike
Route 627	0.91	1.46	Route 201 in North Stonington	Route 2 in North Stonington	—	—	Mystic Road
Route 628	0.33	0.53	US 1 in Old Saybrook	End state maintenance	—	—	Spring Brook Road
Route 629	0.26	0.42	Route 138 in Griswold	I-395 / Route 164 in Griswold	—	—
Route 630	0.36	0.58	Route 164 in Griswold	Route 138 / I-395 in Griswold	—	—
Route 632	0.80	1.29	Route 195 in Mansfield	US 6 / Mansfield City Road in Mansfield	—	—	North Frontage Road
Route 633	0.79	1.27	Mansfield City Road in Mansfield	US 6 / Route 195 in Mansfield	—	—	South Frontage Road
Route 635	0.58	0.93	Huntington Street (SR 641) in New London	Briggs Street (SR 638) in New London	—	—	Williams Street
Route 636	0.64	1.03	Norwood Avenue in New London	Route 32 in New London	—	—	Briggs Street, Briggs-Mohegan Connector, Mohegan Avenue
Route 637	0.51	0.82	Route 11 in Colchester	Route 354 in Colchester	—	—	Lake Hayward Road
Route 638	0.16	0.26	Williams Street (SR 635) in New London	Briggs Street (SR 638) / Briggs-Mohegan Connector (SR 638) in New London	—	—	Briggs Street
Route 639	0.77	1.24	US 1 / Jefferson Avenue in New London	US 1 in New London	—	—	Colman Street; signed as southbound US 1
Route 640	0.14	0.23	Route 74 in Willington	Route 32 in Willington	—	—	Phelps Way
Route 641	1.76	2.83	US 1 in New London	US 1 in New London	—	—	South Frontage Road, Huntington Street, Jay Street, Truman Street, Bank Street
Route 642	2.65	4.26	Route 2 / Route 32 in Norwich	Route 2 / Route 32 / Route 169 in Norwich	—	—	Town Street, Washington Street
Route 643	0.13	0.21	US 1 in New London	Route 213 in New London	—	—	Lee Avenue
Route 644	0.75	1.21	Route 97 in Pomfret	US 44 / Route 169 in Pomfret	—	—	Murdock Road
Route 646	0.18	0.29	Route 82 in Norwich	Route 82 in Norwich	—	—	North Thames Street
Route 647	0.24	0.39	I-395 in Plainfield	Route 12 in Plainfield	—	—	Lathrop Road
Route 649	2.69	4.33	Route 349 in Groton	US 1 in Groton	—	—	Rainville Avenue, Poquonnock Road, High Rock Road, Tower Avenue, South Road
Route 654	0.28	0.45	Route 27 in Stonington	I-95 in Stonington	—	—
Route 660	1.64	2.64	Route 97 in Norwich	Route 138 in Sprague	—	—	Bridge Street
Route 661	0.11	0.18	Route 32 in Windham	Route 66 in Windham	—	—	Thread City Crossing (Frog Bridge)
Route 664	5.70	9.17	Route 14 in Plainfield	US 6 in Killingly	—	—	Lake Street, Snake Meadow Road
Route 668	2.00	3.22	Route 169 in Canterbury	Route 12 in Canterbury	—	—	Butts Bridge Road
Route 680	0.99	1.59	Route 2 in Ledyard	Route 2 / Wintechog Hill Road in North Stonington	—	—	MGM Drive, Foxwoods Boulevard
Route 693	1.41	2.27	Route 32 in Waterford	I-395 in Montville	—	—	Montville Connector
Route 695	4.49	7.23	I-395 in Plainfield	US 6 in Killingly	—	—	Connecticut Turnpike
Route 700	1.73	2.78	Route 130 / Water Street in Bridgeport	Route 130 / State Street Extended in Bridgeport	—	—	Fairfield Avenue; westbound couplet of Route 130
Route 702	0.81	1.30	US 5 in Wallingford	I-91 in Wallingford	—	—	Wharton Brook Connector
Route 703	0.20	0.32	Route 63 in Bethany	Route 42 in Bethany	—	—	Litchfield Turnpike
Route 705	2.63	4.23	Route 162 in West Haven	Route 162 in West Haven	—	—	Ocean Avenue, Platt Avenue
Route 706	0.82	1.32	Howe Street in New Haven	Route 10 in New Haven	—	—	North Frontage Road; westbound couplet of Route 34
Route 707	3.62	5.83	Whitney Avenue at New Haven–Hamden town line	Route 10 / Dixwell Avenue (SR 717) in Hamden	—	—	Whitney Avenue
Route 708	0.32	0.51	Old Gate Lane in Milford	I-95 / Woodmont Road in Milford	—	—	Old Gate Lane
Route 709	0.27	0.43	Route 63 in Naugatuck	Route 8 in Naugatuck	—	—	South Main Street
Route 710	0.31	0.50	Route 8 / Union Street (SR 723) in Naugatuck	Route 8 in Naugatuck	—	—	North Main Street
Route 711	0.81	1.30	Penny Avenue (SR 730 and SR 743) in Trumbull	Route 108 in Trumbull	—	—	Huntington Turnpike
Route 712	0.24	0.39	Route 110 in Shelton	Route 34 in Derby	—	—	Bridge Street
Route 713	0.27	0.43	Route 15 in Fairfield	Route 59 in Fairfield	—	—	Congress Street
Route 714	0.24	0.39	Huntington Street in Shelton	Route 108 in Shelton	—	—	Bridgeport Avenue, Center Street
Route 715	0.51	0.82	I-91 in North Haven	Route 103 in North Haven	—	—	Universal Drive, Montowese Avenue
Route 717	1.15	1.85	Route 10 / Whitney Avenue (SR 707) in Hamden	US 5 in North Haven	—	—	Dixwell Avenue
Route 718	0.27	0.43	US 1 in Guilford	I-95 in Guilford	—	—	Goose Lane
Route 719	2.02	3.25	Route 123 in Norwalk	US 7 in Norwalk	—	—	Main Avenue
Route 720	0.26	0.42	Hartford Turnpike in North Haven	US 5 in North Haven	—	—	Devine Street
Route 721	1.85	2.98	Route 67 in Seymour	Old Turnpike in Beacon Falls	—	—	North Street, North Main Street, South Main Street
Route 722	0.37	0.60	US 1 in Bridgeport	Route 8 in Bridgeport	—	—	Chopsey Hill Road
Route 723	0.16	0.26	North Main Street (SR 710) in Naugatuck	North Main Street (SR 710) in Naugatuck	—	—	Union Street, Golden Court
Route 725	0.08	0.13	Route 22 in North Haven	Route 15 in North Haven	—	—	Hartford Turnpike
Route 816	1.7	2.7	Route 34 in Newtown	River Rd No. 1 in Southbury	—	—	Original Route 6 surface routing, before I84.

History

1913 trunk line system

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 1,400 miles (2,300 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

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

• List of crossings of the Connecticut River
• New England Interstate Routes
• Numbered highways in the United States
• List of unused highways in Connecticut

External links

• Connecticut State Numbered Routes and Roads as of December 31, 2004 (PDF)
• Official State Highway Map (PDF - 5 MB)
• Routes Page by Kurumi
• CT State Highway Endpoint Photos
• Connecticut US and State Route Listing (Greater New York Roads)

References

1. Connecticut State Numbered Routes and Roads as of December 31, 2014