Home >  Roads >  Connecticut >  Secret Route List
Updated Nov 30, 2024

"Secret" routes are numbered routes maintained by the state, but not signposted. These routes are numbered in the 400s through 900s. Signed "non-secret" routes are numbered in the 300s and lower. Most secret routes are less than a mile long. For more information and history, see Secret Routes Explained.

This page is a terse listing of all those I've discovered: 484 numbers in all, most used more than once. Not all of them are very interesting (and some of my information is very scant), but I provide more background on some prominent ones in the 400s, 500s, 600s, 700s, 800s, and 900s and 1000s.

Key

Routes may not necessarily extend along entire length of a noted street. I give extents if I know them.

Route From To Description
400 1962 1964 Lake Rd, Warren; now SSR 478
401 1976 now 2.29 mi; N from CT 20 to Bradley International Airport; then E to CT 75; Windsor Locks
401 1963 1976 N from CT 20 to Bradley International Airport
401 1961 1962 Now part of SR 510, E. Windsor
401 19xx 19xx West St, New Canaan (has another name now); from 1.41 mi W of CT 124 to 0.47 mi E of CT 124; in 1942 log; gone in 1948 or 1949
402 1962 1964 Mt. Carmel Rd, Hamden; now SSR 453
402 1939 1962 0.17 mi; segment of Sport Hill Road, Easton, NW from CT 59
402 1934 1940 Park St, New Canaan; became SR 455. Overlap in time with Easton's SR 402 though.
402 1932 1934 From West Ave in Darien: Noroton Ave, Middlesex Rd, Ox Ridge Ln, Hollow Tree Ridge Rd, Lapham Rd, Old Stamford Rd, Park St, to Elm St in New Canaan
403 2002 or 03 2020 Westbound feeder for Bradley International Airport terminals; connected with SSR 401 at each end
403 1962 1964 Mount Tom Rd, Washington. Became SSR 479
403 1962 1962 assigned to Short Woods Rd, New Fairfield. Conflict with Washington. Spreadsheet also says 417
403 1936 1962 2.82 mi; extended S on Belden Hill Rd, now from Norwalk TL to CT 33, Wilton.
403 1932 1936 Belden Hill Rd from Wolf Pit Rd to CT 33, Wilton. Was later part of CT 106 (as defined 1963-1998)
404 1964 now 0.85 mi; Shaker Rd, Enfield; Bilton Rd, Somers; E from CT 220
404 1950 1962 New Rd, short E-W road from CT 123 to US 7, Norwalk. Became SR 739.
404 1932 1948 1.40 mi; Riverside Ave, Westport; from CT 136 to US 1; most of it became part of CT 33
405 1968 now 0.47 mi; Mountain Rd; under CT 175 to Children's Hosp.; Newington. E/W part was part of 175.
405 1962 1964 Part of Great Hollow Rd, Cornwall; now SSR 480 (but also appeared in 1967 county map)
405 1932 1950 1.14 mi; Bronson Rd, Fairfield; from US 1 to vic. Sturges Rd (this is not Benson Rd, Rte. 135)
406 1962 1964 River Rd and Town St, E. Haddam; now SSR 431
406 1960 1962 Old US 44, Canton, near New Hartford TL
406 1932 1950 1.23 mi; Greenfield Hill Rd, Fairfield; from 2.00 mi N of US 1 to 3.23 mi N of US 1. Does not intersect US 1, though...
407 1962 1964 Stones Ranch Rd, E. Lyme; now SSR 432
407 19xx 1954 somewhere in Putnam; may be incorrect
407 1950 1962 South Benson Rd, Fairfield; the 0.14 mi segment from Old Post Rd to US 1
407 <=1942 1950 0.74 mi; North and South Benson Rd, Fairfield, from 0.14 mi S of US 1 (prob. Old Post Rd) to 0.60 mi N of US 1; northern part is now part of CT 135; in 1942 log
408 3/29/1963 1964 Indian Well Rd, Shelton; was SR 731; became SSR 454
408 1960 1962 Old Hartford Rd, New Britain; "spur relocation of CT 71"; possibly at Stanley St
408 1952 1953 Providence St, Putnam; now part of CT 171
408 <=1942 >=1942 0.26 mi; segment of Providence St W of US 44, Putnam; in 1942 log
409 1932 1971 1.16 mi; Honeyspot Rd, from CT 113 to Stratford Ave, Stratford; death date reported 1971 or 1972
410 1964 2019 2.28 mi; Aircraft Rd (formerly CANEL Rd); from CT 9 exit 10 (CT 154) NE to Pratt & Whitney plant, Middletown. Was SR 461.
410 1932 1962 0.46 mi; Barnum Ave, from US 1A to Bridgeport TL, Stratford
411 1964 now 1.98 mi; West St; from CT 3 to CT 99, Rocky Hill; exit 23, I-91
411 <=1942 1962 0.31 mi; Huntington Tpke (now CT 108) N of Shelton Ave, Trumbull
412 <=1942 1971 1.57 mi; White Turkey Rd (aka Candlewood Lake Rd), US 202 to Huckleberry Hill Rd, Brookfield. Became SR 825. In 1942 log.
412 19xx 1940 North Broad St, Milford; now part of CT 162
413 19xx 1964 Main St, Middletown - conflict: E. Washington St, right? Became SR 545.
413 19xx 1945 0.22 mi; Forest St, from town center to CT 123, New Canaan. Possibly part of later SR 704, SR 803.
414 1962 1964 Ft. Shantok Rd, Montville. Became SSR 433
414 1936 1962 1.95 mi; New Canaan Rd, from New Canaan TL to SR 403, Wilton. Now part of CT 106
415 1944 1962 Ware Rd, between CT 21 and CT 12, Killingly
415 1936 1940 1.32 mi; Great Hill Rd, from CT 34 to Oxford TL, Seymour; now part of CT 334; in 1942 log
416 1936 1962 0.40 mi; Forest St, from CT 99 to Dividend St, Rocky Hill
417 1962 1964 Short Woods Rd, New Fairfield; became SSR 481
417 1936 1962 0.22 mi; Washington Station Rd, Main St, and River Rd, from CT 47 to Cook St, Washington
418 1939 1963 1.69 mi; Saville Dam Rd, from CT 181 to CT 219, Barkhamsted; became part of CT 318
418 1937 1939 Saville Dam Rd, from CT 181 to new dam, Barkhamsted; now part of CT 318
419 1962 1964 Millington Rd and Haywardville Rd, E. Haddam; was SR 624; became SSR 434
419 1937 1962 0.76 mi; Beach Rock Rd (constructed 1937), Barkhamsted
420 1962 1967 N. Eagleville Rd and SI Rd; became SSR 430
420 1952 1962 short section of N. Eagleville Rd, at King Hill Rd, Mansfield
420 1938 1947 2.35 mi; Beach Pond Rd, from CT 138 to SL, Voluntown; was part of CT 138; became part of CT 165
420 1937 1938 Rockville Rd, Voluntown; became part of CT 138
421 1962 1964 Horse Hill Rd, Killingly; now SSR 435
421 <=1948 1962 0.56 mi; Church Av, N from CT 72, Bristol
422 1963 now 0.31 mi; Nott St; E from CT 99 to Hartford Ave, Wethersfield; was part of SR 785
422 19xx 1962 paralleled CT 97 to the west, S from CT 207, Baltic; became part of 207; possibly was High St, old 207
423 1972 now 0.31 mi; Old US 6; from South Rd to state highway garage, Farmington.
423 1964 1967 Belden Rd, Burlington; was SR 436; became SSR 473, then SSR 489
423 19xx 1962 Old Redding Rd, Redding
423 19xx 1954 somewhere in Wethersfield
424 1954 now 0.86 mi; Russell Rd; N from CT 175, Newington; intersects US 5/CT 15 ramps; serves Cedarcrest State Sanatorium; retained number across 1962 reclassification
424 1938 1947 Ference Corner Rd, Ashford; possible future CT 89
425 1962 1964 East River Rd, Barkhamsted; became SSR 482
425 1960 1962 Depot Hill Rd, old CT 20, Enfield (Possibly Old Depot Hill Rd. Depot Hill Rd is now SR 510.) See also SR 425A.
425A 1960 1962 Depot Hill Rd, old CT 20, Enfield. See also SR 425.
425 19xx 1953 somewhere in Putnam
425 19xx 1941 somewhere in Old Saybrook
426 1973 now 0.20 mi; Cady Ln; N from CT 14 to Quinebaug Hatchery, W of CT 12, Plainfield.
426 1962 1964 W. Elm St, Elm St, Deep River (River St was removed); part of old CT 80; became SR 636
426 1941 1962 W. Elm St, Elm St, and River St, from Warsaw St (SR 602) to railroad tracks at river, Deep River. Segment from SR 602 to CT 154 is now CT 80.
427 19xx 1962 0.29 mi; Depot Rd, from CT 32/163 to Lathrop Rd, Montville (shorter than 1932)
427 1932 19xx Depot Rd, from CT 32/163 to the train tracks, Montville
427 1962 1963 Horsepond and Duck Hole Roads; from CT 79 to SSR 450 at I-95, Madison. Became part of SSR 450
428 1962 1964 Maple Tree Hill Rd and Georges Hill Rd, Oxford; became SSR 484. Later this was functionally replaced by Kettletown Hill Rd, SSR 487.
428 1938 1940 Rock House Hill Rd, Oxford; now part of CT 188
428 1943 19xx Military Highway, Groton; was CT 12
428 1944 1962 Danielson Rd and Hurry Hill Rd, from CT 12 to CT 21, Putnam
429 1962 now 0.67 mi; Day Pond Rd (aka Peck Lane); W from CT 149 to Day Pond State Park, Colchester
429 19xx 1962 Williams St, Portland
430 1967 2016 or 2017 0.86 mi; Eagleville Rd; W from CT 195 near UConn, Mansfield (Storrs). Was SSR 420
430 1962 1964 Burr Mountain Rd, Torrington. Became SSR 483
430 1939 1962 Climax Rd (!), Engelke Farm (near or at CT 167) to Avon TL, Simsbury
431 1965 now 2.39 mi; River Rd; N from CT 148 to CT 82, near Gillette Castle state park, E. Haddam - Lyme; was SR 406
431 1964 1965 Smaller portion, extended into today's SSR 431. Was SR 406.
431 1939 1962 Cassaduck Hill Rd, from CT 2 to TL, N. Stonington; became part of CT 201
432 1964 now 0.54 mi; Stones Ranch Rd; N from US 1 to Fourmile River, E. Lyme. Was SR 407
432 1939 1962 Winthrop Rd, from CT 148 to TL, Chester; now part of CT 145
433 1968 2014 or 2015 1.28 mi; Ft. Shantok Rd; S from CT 32 under CT 2A to former Ft. Shantok State Park, Montville.
433 1964 1968 Ft. Shantok Rd Extension, Massapeag Side Rd. Was SR 414.
433 1939 1962 Main St, Sterling (1956 map: from CT 14 to Meadow Hill Rd)
434 1964 now 10.15 mi; Millington Rd; from CT 82/151 to CT 82/156, Devil's Hopyard State Park, E. Haddam; part of it was SR 419
434 1946 1963 Black Pond Rd and Eastford Rd, Woodstock and Eastford. Became part of CT 198.
434 1939 1940 South Salem Rd, Ridgefield; now CT 35. Old South Salem Rd is probable old CT 35 alignment.
435 1964 now 0.21 mi; Horse Hill Rd, SE from US 6, E of I-395, Old Furnace State Park, Killingly. Was SR 421
435 1939 1959 Franklin St, Killingly
436 1962 1964 Belden Rd, Burlington; became SSR 423
436 1939 1954 Russell Rd (formerly Sanatorium Rd), Newington. Became SSR 424
437 1972 now 0.44 mi; Crystal Ave; E from CT 32 to 10th St (State Pier), New London; serves as actual southern terminus of CT 32
437 1963 1972 0.31 miles; Former SR 483 (Old US 1) near old Thames River Bridge, New London. However, another source shows this route deleted c 1965.
437 1950 1962 New State Rd and N. Main St, from US 6/44 to CT 83, Manchester; also Hilliard St; took over SR 806
437 1939 1950 N. Main St, Manchester
438 1966 now 2.90 mi; E. Putnam Rd; N from US 44 to Quaddick State Park; Danielson and Thompson
438 1964 1966 Today's SSR 438, but with an older segment of Quaddick Town Farm Rd. Was SR 488.
438 1939 1962 Gilbert Ave, CT 3 to West St (today's SSR 411), Rocky Hill
439 1976 now 0.56 mi; Hurd Park Rd; S from CT 151 to Hurd State Park, E. Hampton
439 19xx 1962 Farmington Ave, from CT 372 to Worthington Ridge Rd, Berlin
439 19xx 1954 somewhere in E. Granby
439 1939 1940 Springfield Rd, S. Windsor; probably old or new US 5
440 2018 now 0.07 mi; from CT 155 to DOT garage, Middletown
440 1977 6/1/1985 S from SR 649 to Avery Point, Groton. Became part of CT 349.
440 1961 1964 Hatchett Hill Rd and part of Seymour Rd (old CT 189), E. Granby. Was shortened and became SR 540.
440 1954 1961 Hatchett Hill Rd (now SR 540), E. Granby
440 19xx 1951 somewhere in Orange
440 1939 1940 New 4-lane CT 32, New London
441 1939 1962 S. Broad St, from CT 71 (former US 5A) to US 5, Wallingford; now part of CT 150
442 1939 1951 Racebrook Rd, from US 1 almost to CT 34. Became part of CT 114.
443 1939 1962 Old Shetucket Tpke, between CT 164 and CT 165, Preston. Became SR 605. Source also shows change at 1968 instead of 1962.
444 1946 1964 Prospect St, including new section, Wethersfield. Became SR 544. Now CT 287.
444 1940 1946 Prospect St, Wethersfield (future CT 287)
444 1939 1940 Old North Rd, Colebrook
445 1939 7/23/1962 S. Main St, from Main St (then, US 1A) to Montowese St (then, CT 143), Branford; now part of CT 146
446 1939 1962 Summer St, was CT 15A, Portland
447 c. 1967 c.1967 Stones Ranch Rd, from CT 51 to Grassy Hill Rd, Lyme; - conflict: not in spreadsheet; gone by 1990; could be SR 407 instead
447 1939 1962 Taber Rd (aka Second District Rd), W from CT 39 to NY SL, Sherman
448 19xx 1962 Tunxis St, at CT 75, Windsor. Near "new bridge" that opened in 1953.
448 1940 1941 Ferry Blvd, Stratford; now part of CT 130 or US 1
449 1963 now 1.07 mi; Rocky Neck connector freeway; S from I-95 (exit 72) to CT 156, East Lyme; was SR 589 earlier
449 1946 1962 Lebanon Village Rd, from CT 87 to CT 289, Lebanon (now Burnham Rd)
449 1939 1941 near CT 20, Hartland
450 4/13/1984 now 4.46 mi; Hammonasset Connector; S from CT 79 to US 1; freeway from I-95 to US 1; exit 62, I-95
450 1963 4/13/1984 4.67 mi [1971 log]; Today's SSR 450 plus extension across US 1 into park. Portion of this was SR 427.
450 1940 3/29/1963 Patterson Rd, New Fairfield; became SR 850
451 1963 1967 Sherwood Island Connector; became SSR 476
451 1940 1960 Short segment of Hinckley Hill Rd (now Pequot Trail, CT 234), Stonington; near Wheeler Dr
452 19xx 2020 1.5 mi; proposed since 1960s in Milford from I-95 to Silver Sands state park; never constructed
452 1932 1962 Lonetown Rd and Chestnut Ridge Rd, N from CT 107 to TL, Redding
453 1964 now 0.32 mi; Mt. Carmel Rd; E from CT 10 to Sleeping Giant state park, Hamden. Was SR 402
453 19xx 1962 Plumtrees Rd, from Maple Av to Taylor Rd, Bethel
454 1964 now 1.89 mi; Indian Well Rd; NW from CT 110 to Indian River state park (Housatonic River), Shelton. Was SR 408
454 1932 1962 Osborne St (starting at Somers St), Germantown Rd, Sand Pit Rd, and Old Brookfield Rd, to Federal Rd, Danbury; was old US 7 before 1932; part of it erased by 84/7 interchange
455 1962 1964 W. Main St, from CT 372 to CT 71A New Britain; became SR 555
455 1955 1962 W. Main St, from CT 372 to CT 71A New Britain; extended in 1962
455 19xx 1955 somewhere in Middletown
455 1940 19xx Park St, New Canaan; was SR 402
455 1932 1935 South Britain Rd, from Main St. to Middle Rd, South Britain, Southbury; became part of CT 172
456 19xx 1962 Hattertown Rd, from CT 302 to Poverty Hollow Rd, Newtown
457 1932 1962 Wykeham Rd (aka Wykeham Rise Rd), E from CT 47 to Sabba'Day Rd, Washington
458 1962 1963 Blackville Rd and Old Litchfield Rd, from CT 47 to Morris TL, Washington; now part of CT 109
458 1932 1962 Short section of Blackville Rd Extension, Washington; now part of CT 109
459 19xx 1965 3.12 mi of road at Lake Waramaug, Washington; now SSR 478
460 1955 1960 Part of Acheson Dr, Middletown
460 19xx 1965 part of today's SSR 478 at Lake Waramaug, Washington. Conflict: not in spreadsheet, check number
461 1958 1964 CANEL Rd, Middletown; became SSR 410
461 1940 1948 smaller part of earlier SR 461, Kent. Later was part of SSR 477
461 19xx 1940 part of Macedonia Brook Rd, Kent
462 1940 1964 West St, Rocky Hill; became SSR 411
462 19xx 1936 somewhere in Redding
463 1932 1950 Hut Hill Rd, from Wewaka Brook Rd to Clapboard Rd (today's 867), Bridgewater; became part of CT 199
464 1940 1962 High St, Portland
464 1932 1934 0.83 mi; Milltown Rd; New Fairfield; became part of CT 39; now SR 839
465 19xx 1965 N. Main St, near US 7 and CT 107, Wilton and Redding
466 19xx 1962 Meeker Hill Rd, Redding
467 19xx 1962 Umpawaug Rd, from CT 53 to Old Redding Rd, Redding
468 <=1948 1965 0.12 mi; River Rd, N from old US 6A along riverbank in Southbury, under arbitration in 1963
469 19xx 1965 0.15 mi, Depot Hill Rd, Southbury, under arbitration in 1963
470 1940 1962 Old Whitfield St, short section south of Stone House Ln (fka Elm St), near RR tracks, Guilford
470 19xx 1935 Now CT 188, Southbury
471 19xx 4/28/43 Bridge St, New Milford; now part of CT 67/US 202. (note: spreadsheet says ending 1950; hwy log 1944 says already CT 25.)
472 19xx 1950 somewhere in Roxbury
472 19xx 1941 somewhere in Hartland
473 19xx 1962 short section of Grove St near Lover Lane St. Park, New Milford
473 1967 1971 Belden Rd, Burlington; was SR 423; became SSR 489
474 1956 1959 Hartford - Springfield Expwy, Windsor and Windsor Locks; became I-91
474 1941 19xx Old CT 20, probably Walnut Hill Rd, Hartland
475 1935 1971 3.45 mi; South Kent Rd, from CT 341 to New Milford TL, Kent; became SR 827; turned over to town c. 1970
476 1967 now 1.41 mi; Sherwood Island Connector; S from I-95 (exit 18) to Sherwood Island, Westport; was SR 451
476 1936 1962 Botsford Hill Rd, S from CT 25, Newtown
477 19xx 9/1/1987 3.61 mi; Macedonia Brook Rd; N from CT 341 to Macedonia Brook state park, Kent; 26 years of arbitration
477 <=1950 1961 Short segment of Mountain Rd (old CT 9), S from CT 189, Simsbury. Seen in 1950 map.
478 2000 now 6.08 mi; West Shore Road and Lake Road/Anderson Acres Road, loop of CT 45, Lake Waramaug, Warren, Kent and Washington
478 1965 2000 Was in two parts, north and south of Lake Waramaug; I think gap was in town of Kent. The Washington segment was recommended to turn over to the town. Was SR 400 and SR 459.
478 19xx 1962 part of Sherman Tpke, Redding; became SR 818 (mentioned in 1955, Bridgeport Telegram) (note: spreadsheet says SR 817)
479 1964 now 0.25 mi; Mt. Tom Rd, S from US 202 to Mt. Tom state park, Washington. Was SR 403. Was 0.27 mi in 1990.
479 19xx 1962 short section of Pocono Ridge Rd and Stony Hill Rd, S from CT 133, Brookfield
480 1964 now 0.77 mi; Great Hollow Rd, S from CT 4, Mohawk Mtn State park, Cornwall. Was SR 405.
480 19xx 1963 0.06 mi; Riverside Ave, from Railroad Place to Charles St, Westport (spreadsheet calls this Depot Pl)
481 1964 now 0.28 mi; Short Woods Rd; from Squantz Pond State Park to CT 39 in New Fairfield; was SR 417
481 1962 1963 Tunnel Rd and Lake St, Vernon. Became SR 533
481 1951 1962 near I-84 at Tunnel Road, Vernon.
482 1964 now 4.11 mi; East River Rd; N from CT 181/318 to CT 20 along east bank of Farmington River, Barkhamsted; was SR 425
482 1951 1962 Bolton Rd and Feeder Rd, short, near I-84 at Tunnel Road, Vernon. Became SR 533A
483 1964 now 0.49 mi; Burr Mountain Rd, NW from SR 800/843, Burr Pond state park, Torrington. Was SR 430
483 1948 1963 0.31 mi; Old US 1, from Crystal Ave. to State Pier Rd, near Thames River Bridge, New London; turned over to New London c. 1965. Part of this route, a diagonal across Winthrop Park, is now gone.
484 1969 9/29/1983 1.32 mi; proposed I-484; constructed part was SR 598, reverted to SR 598
484 1965 1969 Moved from earlier SSR 484 to Kettletown Rd. Renumbered to SSR 487 because of proposed I-484
484 1964 1965 Maple Tree Hill Rd and Georges Hill Rd, Oxford - Southbury
484 1951 1962 Mile Hill Rd, from I-84 to CT 74, Vernon. Became part of CT 31.
485 10/30/1967 now 1.17 mi; University Dr; N from CT 4 to UConn Torrington campus
485 1941 1964 Babbs Rd, Suffield; was part of CT 190; became SR 585
486 1970 now 1.08 mi; Airport Rd; E from CT 188 to Oxford airport, Southbury/Oxford; (another source says added 1975 or '76; construction started 1975, so may have been only defined in 1970)
486 1956 1963 School St, E. Hartford
487 1969 now 4.24 mi; Kettletown Rd; S from I-84/CT 67 to Kettletown State park, Southbury
487 1957 1962 Wolcott Ave, Bissell Bridge and King St, from Matianuck Ave to US 5, Windsor and S. Windsor; became CT 291
488 1969 now 0.90 mi; Mill St; N from CT 20 to Tunxis state forest, Hartland; was under arbitration; was SR 716
488 1962 1964 Quaddick Town Farm Road, Thompson; now SSR 438
488 1957 1961 short, near CT 189/CT 315, old CT 9, Tariffville
489 1971 now 0.17 mi; Belden Rd, S from CT 4 to Massahegon state forest, Burlington. Was SSR 473
489 19xx 1961 Old Hartford Ave. in E. Granby; was CT 9
490 1991 now 1.10 mi; Nunnawauk Rd/Mile Hill Rd., over Pootatuck River, Newtown (discovered by Neil Kelly).
490 1957 1971 Woodford Ave, 2.06 mi, to NB TL, Plainville; also seen as complete loop with old CT 72. Became SR 536.
491 1959 1962 West St, from near Hart St to Bristol TL, Southington; became part of SR 529, then CT 229
491 19xx 1945 somewhere in New Canaan
492 10/15/1983 now 0.30 mi; portion of Main St South, from US 6/CT 67 to DOT garage, Southbury. Was part of SR 823.
492 1971 10/15/1983 former SR 819, Southbury. The "Garage Rd" used to connect to US 6 at Old Waterbury Rd.
493 11/30/1992 now 0.34 mi; Washington Blvd; from I-95 to US 1/CT 137, Stamford. Signed as part of CT 137.
494 2020 now 0.18 mi; Myra Cohen Way, connecting SR 505 to the Cedar Street CTfastrak station. The road opened in 2015, but added to state system in 2020.
500 9/16/1983 now 0.51 mi; Vestigial I-284 limb from I-84 (exit 56)/ CT 2, E. Hartford. Was (unsigned) I-284.
500 1963 1976 Present-day SR 500. Became unsigned I-284 in 1976.
500 1961 1962 Rainbow Rd (famous in Mario Kart :-), old CT 20, E. Granby - Windsor
500 1946 1960 short section of Conland Hwy near CT 15 (prob. now part of I-91). In 1960, officially became "now a ramp".
500A 11/30/2011 <=2013 1.96 mi; Broad St and E. Main St, from CT 229 to CT 72/CT 372; was part of CT 72. No relation to SR 500.
501 1966 now 0.77 mi; Trout Brook Connector; I-84 exit 43 to Park road, long exit ramp (planned for freeway)
501 19xx 1962 now part of CT 2, Norwich
501 1932 1939 Franklin St and Maple St, Ansonia. Now part of CT 334.
502 1993 now 6.31 mi; Silver Ln and Spencer St; E. Hartford to Manchester; extended from US 5 to CT 2 in 1993
502 1964 1993 5.79 mi; [1971 log] Silver Ln and Spencer St, E. Hartford to Manchester; was SR 810
502 1962 1963 Burton Rd, Beacon Falls, and Beacon Rd, Bethany; became CT 42 (not sure about Burton Road part)
502 1932 1962 Bethany Rd, Beacon Falls; now part of CT 42
503 1976 now 0.57 mi; I-84 exit 46 to Sisson Ave, Hartford; long exit ramp (planned for CT 189 freeway)
503 1969 1976 present day SR 503 and West Blvd, Hartford
503 1964 1968 Section of Old Pines Bridge Road, Beacon Falls
503 1932 1964 Chestnut Tree Hill Rd and Pines Bridge Road, Beacon Falls, W from CT 8 to TL; became SR 703; now part of CT 42
504 1969 now 0.70 mi; I-84 exit 45 to Flatbush Ave, long exit ramp (planned for Cedar Ridge Connector freeway to Berlin Tpke)
504 1965 1967 E. Main St and Meriden Rd, Meriden; from US 5 to CT 66 exit 13; was US 6A; became SR 706
504 1962 1965 E. Main St, Meriden
504 1945 19xx Depot St, Beacon Falls; until at least 1960
504 1932 1935 Quaker Farms Rd, from Governors Hill Rd to Southbury TL, Oxford; became part of CT 188
505 1992 now 0.53 miles; Fenn Rd/Ella Grasso Blvd; N from CT 175 to CT 9, Newington.
505 1969 9/11/1989 0.28 mi; section of Tariffville Rd and Blue Hills Ave Ext, at CT 187/189 interchange, Bloomfield (also cited as 0.31 mi)
505 1933/34 1963 Cheshire Rd, from CT 63 to CT 69, Bethany; now part of CT 42. Was part of CT 69. Created when 69 was moved.
506 1986 1990 1.90 mi; Taras Shevchenko Expwy; extended to CT 175 in 1986 and opened to traffic. Became part of CT 9
506 1969 1986 Connector from CT 72 fwy (now CT 9) toward planned I-291; "Road to Nowhere"; not open to traffic until 1986
506 19xx 1964 segment of old CT 2 in Lebanon; became SR 608
506 1961 1962 segment of old CT 2 in Bozrah; probably now part of SR 608
506 19xx 19xx unknown route, turned over to Norwich c. 1965
507 8/14/1969 9/22/1978 1.04 mi [1971]; Ellis St Connector fwy, New Britain; from today's CT 9/SR 571 split to Ellis St; became CT 72; now CT 9
507 1961 19xx Bozrah St Extension, Norwich; was part of CT 163
507 19xx 1961 somewhere in Bozrah. Might now be Haughton St, CT 163.
507 19xx 1948 Academy Hill Rd and Woodbury Rd, Watertown; once a connector from US 6 to CT 63. (SR 838 is a shorter connector today.)
508 1972 now 1.82 mi; CT 4 connector from I-84 exit 39, Farmington; once planned for CT 4 freeway
508 1969 1972 CT 4 connector, extending only from I-84 to Patrick Flood Rd
508 1932 1962 Woodtick Rd, from TL to CT 322, Wolcott
509 1932 now 0.51 mi; Clark St; S from CT 10 to CT 322, Southington. No number or alignment changes in 90+ years.
510 1962 now 2.55 mi; S. Main St and N. Main St, E. Windsor; part of this was old CT 20. Was SR 401. Also see SR 425.
510 1932 1962 South End Rd, from CT 322 to CT 10, Southington
511 12/31/1980 now 0.38 mi; Hooker St; near CT 72/CT 10, Plainville
511 1966 1971 0.37 mi; Pearl St and High St, Enfield; was part of CT 190
511 1932 1964 North St, from CT 67 NW to CT 8, Seymour; now part of SR 721
512 197x 9/22/1978 2.12 mi [1978]; now part CT 72 freeway, from I-84 to Lake St, New Britain
512 1969 197x 1.75 mi [1971]; part of today's CT 72 freeway, from I-84 to W. Main St, New Britain
512 <=1948 1962 Short section Charcoal Ave, from CT 64 westward, Middlebury.
512 1932 19xx White Deer Rock Rd, Woodbury, to Charcoal Ave, Middlebury; from US 6 to CT 64. Was SH 154. See old SR 518.
513 1967 now 0.67 mi; Bridge St; E from CT 75/168, Suffield. Added when new CT 190 bridge opened.
513 1932 1962 N. Main St, Plymouth; became SR 815
514 1968 now 0.20 mi; Franklin St, north frontage road for CT 190, Enfield
514 1954 1962 Bridge St, Atwater Ave, Clifton Ave; Ansonia and Derby; part of this is now SR 727
514 1932 1952 Atwater Ave, Clifton Ave; Ansonia and Derby
515 1968 now 0.20 mi; Frew Terrace, south frontage road for CT 190, Enfield
515 19xx 1962 Seymour Ave and Water St, old CT 8, Derby
516 1970 now 0.18 mi; Willow St, E from CT 2 (exit 5) to SR 517, E. Hartford, Pratt & Whitney.
516 <=1948 1962 Spring Rd (also reported Whittemore Rd (prob extension)), near CT 64 and CT 188, Middlebury
517 1970 now 1.24 mi; Main St, N from CT 2 to US 5, E. Hartford, 4-lane divided, old CT 17; 1.30 mi in 1990
517 1962 1964 short part of Sycamore Rd and Church St, now CT 317, W from US 6, Woodbury
518 1972 now 0.45 mi; Roberts st, north from Silver Lane (SR 502) to I-84 exit 58 ramps, E. Hartford.
518 1960 1962 Old CT 2, Preston. Probably Hewitt Rd.
518 19xx 1950 White Deer Rock Rd, Woodbury; old SH 154. See old SR 512.
519 1970 10/10/1989 0.18 mi; Bantle Rd, Glastonbury; old ramp from Griswold St to CT 2 EB; deleted when ramp closed
519 1960 1962 Long Society Rd, old CT 165, Preston
519 19xx 1941 Cheshire Rd, from CT 63 to CT 69, Bethany
520 1962 1963 became CT 320
520 19xx 1961 somewhere in Griswold
520 19xx 1947 Weekeepeemee Rd, from CT 47 to Bethlehem TL, Woodbury; became part of CT 132
521 1971 19xx Proposed but never built E frontage road for I-291, from CT 71 to Fenn Rd, New Britain. Likely cancelled when I-291 was.
521 <=1948 1962 Tucker Hill Rd, Middlebury
522 1971 19xx section of Fenn Rd, Middlebury. Cancel date missing
522 1962 1963 0.66 mi; now part of CT 322, from CT 69 to Bound Line Rd, Wolcott
523 1971 19xx Proposed but never built E frontage road for I-291, from Fenn Rd to CT 71, Newington. Likely cancelled when I-291 was.
523 1951 1962 2.28 mi; Elm St, Windsor Locks; old CT 78; now part of CT 140
524 1990 now 0.31 mi; Berlin Rd, Cromwell; was part of CT 72
524 1951 1962 North St, Windsor Locks; was CT 76
525 1951 1990 2.08 mi [1990]; West St, Cromwell; became part of CT 372. Kept its number across 1962 reclassification.
526 1962 now 1.66 mi; Sheldon St; E from CT 187 to CT 168, Suffield
526 19xx 1961 somewhere in Griswold
527 1964 now 2.05 mi; West St; from CT 30 at Vernon Center to CT 83/74 in Rockville. Was SR 827
527 1960 1962 Gilead Rd, Hebron; old alignment of CT 85
527A 1961 1962 Gilead Rd and Martin Rd, Hebron; old alignment of CT 85
527B 1961 1962 West Hardy Rd, Hebron; old alignment of CT 85
527C 1961 1962 "South JCT of 85/94" - probably Salt Box Rd, Hebron; old alignment of CT 85
527D 1961 1962 East St, Hebron; old alignment of CT 85
528 1964 now 2.64 mi; Turnpike Rd; SE from CT 83 to CT 190, Somers. Was SR 828.
528 1961 7/30/1962 McCurdy Rd and Ferry Rd, Old Lyme; Old CT 156
529 1969 now 1.33 mi; New Britain Ave, W. Hartford and Hartford; E from CT 173 to Newington Ave; was US 6
529 1962 1963 Middle St and West St, Bristol and Southington; became CT 229
530 1969 now 0.58 mi; Airport Rd, I-91 exit 28, Hartford, from Wethersfield Ave. to Brainard Rd; was US 6
530 1962 1965 Pitkin St, E. Hartford
531 1969 now 1.39 mi; South Rd from CT 4 to Colt Hwy, and one-way EB section of Colt Hwy (formerly US 6)
531 7/30/1962 1969 1.09 mi: South Rd, from CT 4 to US 6, Farmington
532 1971 now 0.44 mi; Birch St; one-way SB from crick in CT 177 to CT 10, Plainville and Southington. Was part of CT 177.
532 1962 1971 Town Line Rd, from S. Washington St to CT 10, Plainville. Became part of CT 177.
533 1963 now 4.03 mi; Cider Mill Rd/Tunnel Rd; US 6/44 in Bolton to CT 30 in Vernon. Part of this was SR 481.
533 1962 1963 Cider Mill Rd, Bolton; extended in 1963
533A 1963 1977 Feeder and Bolton Rds near 533/84 interchange. Was SR 482; became SR 541
534 3/29/1963 now 4.49 mi; Highland St, Manchester and Camp Meeting Rd, Bolton; was CT 85
535 1969 now 0.21 mi; Ridgewood Rd, N from CT 71 to I-84 WB exit 40, W. Hartford.
535 1962 1967 Orcuttville Rd, Stafford; became SR 611. Is now CT 319.
536 1972 now 1.53 mi; Pine St, Woodford Ave, Crooked St; CT 372 to I-84 exit 34 to CT 372, Plainville; was larger (W. White Oak Ave; under arbitration until c. 1990; still 1.13 miles of this is slated to return to town)
536 1971 1972 Crooked St, White Oak and Woodford Ave, Plainville; part of this was SR 490
537 1971 1/10/1986 0.44 mi; Maple Hill Ave; N from CT 174 to vic Robbins Ave, Newington; was SR 760; turned over to town when reconstruction was completed, per agreement dated 7/3/1969.
539 1962 now 3.70 mi; Mountain Rd; from CT 20 in Hartland to CT 189 in Granby; marked at each end as "TO" the other route; was SR 922
540 1964 now 1.43 mi; Hatchett Hill Rd; E from CT 189 to CT 187, Granby; was SR 440
541 1977 now 0.82 mi; Bolton Rd, south frontage road, I-84 exit 66 (SR 533), Vernon; was SR 533A
542 1977 now 0.30 mi; North Frontage Rd, I-84 exit 66 (SR 533), Vernon
543 1963 now 0.38 mi; Maple Ave; N from CT 314 to Hartford TL, Wethersfield
543 1963 1963 Maple Ave, from CT 15 to Hartford TL; part of this became CT 314
544 1964 19xx Prospect St, Wethersfield; was SR 444; became CT 287, but date missing; c. 1971
545 1964 now 0.15 mi; Washington St; E from CT 66 to CT 9/17, Middletown. Was SR 413
546 1977 1986 Temporary designation for Jennings Rd, Hartford
547 1977 6/29/1984 Temporary designation for Rev. Moody overpass (Market-Weston St Connector), Hartford. Turned over to the city when it opened.
549 1964 now 1.14 mi; Birdseye Rd; US 6 to CT 4, Farmington; was SR 789
549 1951 1962 Grove St, Vernon; became part of CT 31
551 <=1948 1966 2.21 mi; Murdock and Paddock Ave, E. Main St to TL, Meriden; arbitration;
552 1973 now 0.23 mi; Scott Swamp Rd; US 6 to CT 10 connector, Farmington; was rare stretch of US 202 by itself
552 1951 1962 became CT 243, Ansonia and Woodbridge. Part of it was CT 114A
552 19xx 1951 Old Derby Tpke, Woodbridge; probably Ansonia Rd (modern CT 243) W of CT 114 (in 1948: New Haven Ave (now 243), from Prindle Ave to Racebrook Rd; then Racebrook Rd (now 114) S to TL)
553 1951 1962 Ridge Rd and Bishop St, from E of Davis St to State St, North Haven; now part of CT 22
553 <=1948 1951 Bishop St and Broadway, from Ridge Road to Washington Ave, North Haven; became part of CT 22
554 <=1948 1952 short part of State St, N from CT 22/US 5, Hamden
555 1979 now 1.30 mi; West Main St; E from CT 372 to Main St, New Britain. Was cancelled in 1979, reinstated 1981.
555 1969 1979 Included what is now the W. Main St part of CT 372
555 1964 1969 Was SR 455, New Britain, including from Main St to Court St.
555 <1950 1962 Turnpike Rd, now CT 150, from US 5 to CT 15, Wallingford.
555 19xx 1948 Turnpike Rd, now CT 150, from US 5 to CT 15, Wallingford. Portion also canceled in 1962; details missing.
556 <=1948 1962 Westfield Ave, N. Wall St to TL, Meriden
556 1932 19xx Westfield Ave, Bee St to TL, Meriden
557 <=1948 1949 Horse Pond Rd, N from US 1 to Scotland Rd, Madison (future location of SSR 450?)
558 1951 1962 Main St and Railroad Ave, Chester; was CT 148A; became 658
558 1932 1943 became CT 100, E. Haven; Thompson Ave, from Main St to Dodge Ave
559 1951 1962 Woodstock Rd, from CT 169 to US 44, Pomfret; was part of CT 93.
559 19xx 1935 somewhere in Branford
560 1962 1964 Quinnipiac Ave, from CT 17 to TL, No. Haven; became SR 750; now CT 103
561 1935 1962 Miller Ave and Yale Ave, from SR 551 to TL, Meriden
562 1964 11/23/1987 1.41 mi; Cooke St; N from CT 372 to CT 10, Plainville; was SR 762
562 1935 1962 Preston Ave, from CT 66 to TL, Meriden
563 1962 1963 SR 563 extended northerly. Became CT 313.
563 1936 1962 Rimmon Rd, from CT 243 to Old Ansonia Rd, Woodbridge and Seymour; now part of CT 313
564 7/x/1962 1963 became CT 364, Southington and Berlin
565 1963 now 1.73 mi; Maple Ave and Dowd Ave; near US 44, CT 179, Collinsville and Canton. Was SR 765
566 1963 1973 1.62 mi; Torrington Ave, old CT 4, near 202/179, Canton
567 1963 2/2/1981 Park Place, Granby. Was part of old CT 9
569 1996 now Lawnacre Rd, I-91 to CT 159 connector in Windsor Locks
569 1964 1969 S. Main St, from New Britain Ave to I-84, W. Hartford; became CT 173
571 1990 now 1.45-mile freeway, from CT 9 to CT 71A in Berlin. Was CT 372. Before that, was CT 72.
572 1990 now 0.48 mi; from NB CT 9 exit to SB CT 15
572 1969 1990 3.39 mi; today's CT 372, from CT 71A to US 5/15
572 1962 1969 Worthington Ridge Rd, Berlin
575 1962 1963 Extended along Stonehouse Rd, Coventry. Became CT 275
575 1957 1962 S. Eagleville Rd, Mansfield
576 1957 1962 Pleasantville Rd; short connector from CT 12 to CT 101, Pomfret; now displaced by I-395 interchange. But 1958 map shows this is Pleasant St in Dayville (Killingly), which is still there
577 1955 1962 Old Hampton Rd, paralleling US 6 E of CT 198, Chaplin; was old US 6
578 1955 1962 Extended along old Old Shore Rd (old CT 156)
578 1943 1955 Griswold Point Rd, from CT 156 to beach area, Old Lyme
579 1960 1962 2.58 mi; Town St, Norwich; was CT 2 and CT 32; now SR 642
579A 1960 1962 0.07 mi; location unknown (Yantic Flats Rd?); was CT 2 to dead end, Norwich
580 1957 1963 Black Hill Rd, E from CT 14A to CT 12, Plainfield; now part of CT 14
582 1964 1966 New London Turnpike, old CT 2, Glastonbury (conflict: appears in 1967 and 1978 county map)
582A 1964 1966 Tollgate Rd (old CT 2), Glastonbury (conflict appears in 1967 and 1978 county map)
583 1964 1966 Main St, (old CT 2), Marlborough
583 1958 1958 Main St, Brooklyn; old US 6
585 1964 now 1.25 mi; Babbs Rd; N from CT 168 to Mass SL, Suffield; was SR 485; old CT 190
585 1959 1962 Dyer St, Franklin St, Water St, Killingly; old CT 12
586 1959 1963 Academy Hill Rd and Bradford Hill Rd, from CT 12 to CT 49, Plainfield; was CT 49A; became CT 14A
587 1959 1964 0.32 mi; Gallup St, Plainfield; became SR 667
588 1959 1963 Ledyard Rd, North Rd and Center Groton Rd, from CT 184 to Col. Ledyard Hwy, Groton; became CT 117
589 1959 1960 Rocky Neck Connector; became SSR 449 in 1963
590 1966 1974 1.20 mi; extended over Thompsonville Rd and Main St, Enfield
590 1964 1966 N. Main St, from Pearl St to US 5, Enfield; was CT 190A
590 1959 1960 Danielson Connector, N from CT Tpke to US 6; now part of I-395
591 1960 1962 Old CT 2 in Marlborough, Hebron and Colchester; probably exit 15 to exit 17
591A 1962 1962 Temporarily applied to (part of?) SR 591
597 1964 now 0.60 mi; I-84 exit 30 to CT 10, Cheshire. Was SR 990. Intended as part of CT 10 freeway.
598 9/29/1983 now 0.67 mi; Whitehead Hwy (was to be I-484), Hartford, I-91 exit 29A, freeway
598 1964 1969 Same as present-day SR 598; renumbered to (but never signed as) I-484; was SR 988
599 1964 1969 Skeet Club Rd and Reeds Gap Rd, Durham; was SR 623; became extension of CT 157 from CT 147 to CT 68.
599 1961 1962 Old Stonington Rd, Stonington; old alignment of US 1
599A 1961 1962 Old US 1, Stonington; reported as Wilbur Rd; possibly Wilcox Rd, known old alignment
599B 1961 1962 Old US 1, Stonington; reported as Montauk Ave
600 1962 now 0.67 mi; Kinsman Hill Rd; NE from CT 138 to CT 169, Lisbon
601 12/1/1964 2000 0.15 mi; Windham Rd, N from CT 32 to CT 66, Windham; replaced by nearby Frog Bridge, SR 661. Was CT 32.
601 1932 1962 Commerce St, from waterfront to US 1 near CT 81, Clinton
602 6/1/1986 now 3.28 mi; Middlesex Tpke/Main St; SE from CT 80 to CT 153, Deep River and Essex.
602 1/2/1967 6/1/1986 6.38 mi [1971]; Old CT 9, Essex and Old Saybrook. Most of this became part of CT 154.
602 1966 1967 Old CT 80, Old Saybrook
602 1940 1963 0.8 mi; West St, Middlefield; was part of CT 147
602 1932 1940 Baileyville Rd, from West St to CT 157, Middlefield; became part of CT 147
603 1962 now 3.54 mi; Day Hill Rd / Boston Hill Rd, E from CT 85 to CT 316, Hebron and Andover
603 1962 1962 Old CT 2, Preston
603 19xx 1935 Became part of CT 154, Old Saybrook
604 6/1/1986 now 0.80 mi; Westbrook Rd (formerly part of CT 153), from CT 153 to SR 602, Essex
604 1/2/67 6/1/1986 1.93 mi [1971]; Old CT 153 and old CT 9 (Deep River Rd), Essex. Much of this became part of CT 154.
604 1966 1967 Old CT 153, Essex (possibly same as now; Westbrook Rd)
604 1962 1962 Old CT 2, Preston
604 19xx 1939 Warsaw St, Essex and Deep River; became part of old CT 17
605 1968 now 0.30 mi; Old Shetucket Tpke, NW from CT 164 to CT 165, Preston. Was SR 443
605 1934 1/2/67 West Ave, Plains Rd and Main St from CT 153 to river, Essex. Part of this was part of CT 144 in 1934. Portion west of old 9 was reported turned over on 6/21/62.
605A 19xx 6/21/1962 S. Main St, Essex. Mentioned in Aug. 1953 project notice.
605B 19xx 6/21/1962 N. Main St and River Rd, Essex, to Deep River TL. Once part of CT 144
606 1962 1975 0.26 mi; Plainfield Rd, Canterbury; was part of CT 14
607 1968 now 2.54 mi; Danielson Pike/Wescott Rd, NW from US 6 to CT 12, Killingly; was US 6A.
607 9/1/1957 1964 Barnes Rd and Durham Rd, Wallingford; became SR 707 (is now SR 68) (some source say late 1930s)
608 1979 now 4.32 mi; Norwich Colchester Tpke; E from SR 616 to Norwich TL, Bozrah
608 1978 1979 Old CT 2, but shorter, section abandoned
608 1964 1978 Old CT 2, Lebanon; was SR 506
608 1932 1962 Court St, from Shunpike Rd (future CT 3) to CT 99, Cromwell. (Predates CT 3)
609 1970 now 0.97 mi; Leesville Rd; SE from CT 151 to CT 149, E. Haddam; was part of CT 151
609 1966 1968 part of future CT 9 freeway, Essex and Middletown
609 1932 1962 Washington Rd, Cromwell
610 1962 now 2.16 mi; Baltic Rd; N from CT 32 to CT 207, Franklin
610 1932 1962 Evergreen Rd, between Washington Rd and CT 99, Cromwell
611 1967 2/10/1988 2.83 mi; Orcuttville Rd, Stafford; was SR 535; became CT 319
611 1932 1962 New Lane, Cromwell; from West St to Main St
612 1962 now 0.14 mi; Haughton Rd; continuation of CT 163 N past CT 2 to CT 608, Bozrah
612 19xx 1947 somewhere in Lyme
612 1940 1940 West St, Cromwell; became part of CT 18
613 1963 1974 part of Ocean Ave. between Colman St, US 1; became part of CT 213
614 1973 now 2.63 mi; Allyn St/Cow Hill Rd; S from CT 184 to I-95 exit 89, Groton; renumbering to CT 319 was reverted
614 6/5/1972 1973 was probably extended along new Allyn St Connector to US 1
614 8/15/1966 1972 1.42 mi; Mystic St and Cow Hill Rd, from Sandy Hollow Rd to CT 184
614 1932 1962 Rock Landing Rd and Haddam Neck Rd, Haddam and E. Hampton; near Hurd Park Rd, but not same road
615 1967 now 1.32 mi; Old CT 2, S from CT 2 exit 17 to CT 85, Colchester
616 1971 now 7.04 mi; Old Rt. 2, E from CT 85, Colchester to dead end past SR 608, Lebanon
616 1967 1971 Old CT 2, Colchester
616 19xx 1939 somewhere in Portland, became part of CT 15 (now CT 17)
616 19xx 6/8/1962 Depot Rd, Haddam (note: not in spreadsheet)
617 1970 now 0.85 mi; I-95 frontage road, E from CT 2 to CT 49, exit 92, N. Stonington
617 1963 19xx Old CT 193, Thompson (where is this? Possible attempted cancellation of CT 21)
617 19xx 1947 somewhere in Lyme
618 1969 now 0.69 mi; N. Frontage Rd; SW from SR 607 to US 6, Killingly
618 1947 1962 from ferry slip to Gillette Castle, Lyme; became part of CT 148
618 19xx 1935 Spencer Plains Rd, from CT 153 to Old Saybrook TL; became part of CT 166
619 1969 now 0.49 mi; Gauthier Ave, from I-395 to SR 607, Killingly
619 1935 1962 Stowe St and Cider Mill Rd, Middlefield; from old CT 217 to old CT 159
620 1969 now 0.31 mi; Buckley Highway, from CT 171 near I-84 to Mashapaug Rd, Union
620 19xx 1962 Bartlett St, Portland
621 1972 now 0.10 mi; Frontage Rd, from CT 153 to CT 154, Essex
621 1962 1970 Moodus-Leesville Rd, E. Haddam; connected CT 151 and CT 149.
621 1935 1959 Stevenstown Rd, Westbrook; became part of CT 145
622 1962 2/1/1988 became CT 244, Eastford and Pomfret
622 1935 1959 McVeagh Rd, Westbrook
623 1972 now 1.25 mi; N. Frontage Rd; New London, near I-95/CT 32
623 1962 1964 Durham Rd, Gap Rd, and Middlefield Rd, Middlefield; became SR 599; now CT 157
623 1935 1962 Durham Rd, Middlefield, short segment S from CT 147; now part of CT 157
624 1976 now 0.60 mi; S. Frontage Rd; New London, near I-95/CT 32
624 1972 1976 New S. Frontage Rd, New London; truncated to Colman St. in 1976; related to CT 213 changes
624 1969 1972 Old S. Frontage Rd, New London; was relocated in 1972
624 1935 1962 Mt Parnassus Rd, from CT 82 to Veselak Rd, E. Haddam, became SR 419; now part of SSR 434
625 1963 now 0.99 mi; Grove Beach Rd South; N from US 1 to CT 145, Westbrook; was part of CT 145
626 1964 now 0.25 mi; Providence/New London Tpke; from CT 184/CT 216 to RI SL, Stonington. Was part of CT 95.
627 3/29/1963 now 0.91 mi; Mystic Rd; E from CT 201 to CT 2, N. Stonington; was part of CT 119
628 1969 now 0.33 mi; Spring Brook Rd; near CT 9 / CT 154 / I-95, Old Saybrook
628 1947 1963 Military Hwy (old CT 12), from CT 12 to TL, Ledyard; was SR 428
629 1969 now 0.26 mi; north frontage road, I-395 (exit 85), CT 138/164, Griswold
629 1962 3/29/1963 Mains Crossing Rd, N. Stonington; now part of CT 201
630 1969 now 0.36 mi; south frontage road, I-395 (exit 85), CT 138/164, Griswold
630 1962 19xx Maple Ave (probably Maple St), Killingly
631 1969 2002 0.18 mi; Lindholm's Corner, S from US 6 to CT 87. Decommissioned around 2002 when the 6/87 intersection was modified.
631 3/29/1963 1963 about 0.8 mi; Old Boston Post Rd, old US 1A, Old Saybrook
632 1969 now 0.80 mi; north frontage road for US 6, High St. to CT 195, Mansfield
633 1969 now 0.79 mi; south frontage road for US 6, High St. to CT 195, Mansfield
634 1971 12/31/1980 1.62 mi; present-day I-384 freeway from US 6/US 44 split to 0.13 mi W of Bolton TL. Became part of I-84. Now part of I-384.
635 1972 now 0.58 mi; Williams St, from SR 641 to SR 638, New London
636 1972 now 0.64 mi; Briggs St, New London
636 1964 1966 West Elm St, Deep River; was SR 426; became part of CT 80
637 1972 now 0.51 mi; Lake Hayward Rd, W from CT 85 to CT 11 exit 6, Colchester; added when CT 11 opened
638 1972 now 0.16 mi; part of Briggs St, from SR 635 to SR 636, New London
639 1974 now 0.77 mi; Colman St, New London. Signed as SB US 1.
640 1974 now 0.14 mi; No name, S from CT 74 to CT 32, Willington. Added 1973 (note: 1974 in spreadsheet)
640 1963 1967 Poquetanuck Rd, Preston; was CT 27; became CT 2A
641 1976 now 1.76 mi; Jay St/Truman St/Bank St, from US 1 to US 1, New London; was US 1A
641 1963 8/15/1966 Col. Ledyard Hwy, Groton; was CT 27
642 2000 now 2.65 mi; Washington and Town Sts; E from Yantic to CT 2/CT 32/CT 169, Norwich. Formerly part of CT 2.
642 1976 2000 Extended over more of W. Town St
642 1974 1976 West Town St, Norwich; former CT 2 (however, appeared in 1971 log, 1.07 mi; between CT 2 and CT 52)
643 1974 now 0.13 mi; Lee Ave; SB one-way from US 1 to CT 213, New London. Was CT 213.
644 11/6/1974 now 0.75 mi; Murdock Rd, E from CT 97 to US 44/CT 169, Pomfret; was SR 858 until 1962
645 1962 9/1/1987 Pequot Trail, Stonington; became CT 234
646 5/1/1985 now 0.18 mi; N. Thames St aka "Looping Rd", under CT 82 viaduct at CT 32, Norwich
647 1993 now 0.24 mi; Lathrop Rd, from I-395 to CT 12, Plainfield
649 6/1/1985 now 2.69 mi; E from CT 349 to US 1, Groton
649 1977 1985 Today's SR 349, High Rock Rd, Tower Ave and South Rd, leading to US 1, Groton. Part of it became SR 349.
649 1967 1977 Extended to Avery Point (I believe); southern half became SSR 440
649 1962 1967 North St, Mitchell St, Groton; extended along old US 1A on North St
649 1962 3/29/1963 North St, Mitchell St, Groton
650 1932 1962 Willetts Ave, from US 1 to New London TL, Waterford.
651 1932 1963 Great Neck Rd, from US 1 to S of Lamphere Rd, Waterford; now CT 213. Small changes in 1951 and 1962.
652 1962 1963 Relocated Vauxhall St and Ledyard St, New London
652 1932 1962 1.03 mi; Vauxhall St, S from Douglas Rd, Waterford, into New London
654 1998 now 0.28 mi; approach to I-95 SB from CT 27, Groton; added with 95/27 interchange revamp
654 1955 1963 extended to: from CT 85 in Colchester to CT 82 in Salem; became CT 354
654 1932 1955 Old Colchester Rd, from Witter Rd to CT 82, Salem; now part of CT 354
655 1932 1936 Bozrah St, from entrance to transfer station (formerly Bashon Hill Rd) to Fitchville Rd (old CT 2), Bozrah; became extended CT 163
658 1964 7/1/1983 0.49 mi; Main St, Chester; formerly CT 148A; was SR 558
658 1960 3/29/1963 was SR 679; became CT 16 between CT 85, CT 207
658A 19xx 1960 somewhere in Lebanon, probably near today's CT 16 (which was SR 658 from 1960-1963)
659 19xx 1935 Chicken Row Rd, Sprague; regrettably, a road with that name no longer exists
660 1962 now 1.64 mi; Bridge St, Riverside Dr, and Papermill Rd, NE from CT 97, to CT 138, Sprague / Lisbon. Likely was realigned when 138 was extended.
660 1932 1962 Bridge St, Main St, and Papermill Rd, from CT 97 in Occum (Norwich) to bridge over Old Stone Mill Brook, Sprague
661 2000 now 0.11 mi; new "Frog Bridge" paralleling former SR 601 in Windham
661 19xx 1952 somewhere in Norwich
662 1932 1935 Preston Rd, from Brewster Rd to CT 138, Griswold; now part of CT 164
663 1932 1934 Glasgo Rd, from CT 165 to CT 138, Griswold; became short CT 201; now part of long CT 201
664 1964 now 5.70 mi; Snake Meadow Rd, N from CT 14 to US 6, Plainfield and Killingly; was SR 864
664 19xx 1963 Hallville-Poquetanuck Rd, Preston; became part of CT 117
664 1932 1949 Poquetanuck Rd and Hallville-Poquetanuck Rd, from CT 12 to CT 2, Preston; Poquetanuck Rd became part of new CT 27
665 19xx 1950 somewhere in Old Lyme
665 1932 1947 isolated part of Shewville Rd, N of CT 214, Ledyard
666 1950 1964 0.98 mi; Four Mile River Rd, Old Lyme; was under arbitration
667 1964 1993 Gallup St, NE from CT 12 to CT 14A, short, Plainfield; was SR 587
668 1964 now 2.00 mi; Butts Bridge Rd, CT 169 to CT 12, Canterbury; was SR 868
668 1932 1935 Mystic Rd, from TL to CT 2, North Stonington; became part of CT 119
669 1950 1950 Pennsylvania Ave, E. Lyme; became part of CT 161
669 19xx 1949 somewhere in Colchester
670 1962 8/15/1966 0.31 mi; Groton Long Point Rd, Groton; portion south of CT 215
670 19xx 1962 Prospect Hill Road, from Brook Street to West View Avenue (old CT 215), Groton
670A 19xx 1962 0.21 mi; Ward Avenue, Noank section of Groton
670B 19xx 1962 0.12 mi; Mosher St, Noank section of Groton
674 195x 1962 Scotch Cap Rd, entire length, Waterford; not shown on 1956 town map, but is on 1958 map
675 19xx 1962 Oswegatchie Rd (now Niantic River Rd), S from US 1 to just N of 10th Ave, Waterford
676 1936 1949 Parum Rd, Colchester
677 1947 1949 Quakertown Rd, Ledyard, and Y Rd, Preston; became CT 27
677 1936 1947 Quakertown Rd, Ledyard; became part of CT 27 later
679 1949 1960 Lebanon Ave and Pease Rd, Colchester and Lebanon; became SR 658; now CT 16
680 11/30/2011 now 0.99 mi; old CT 2 next to "Super 4" freeway in Ledyard
682 1954 1962 Old Willimantic Rd, near CT 203, Windham and Chaplin; was US 6
693 1964 now 1.41 mi; I-395 exit 78 to CT 32 south, Montville Connector, freeway, Waterford and Montville; was SR 993
695 1964 now 4.49 mi; I-395 exit 90 to US 6 / RI state line, freeway, Killingly; was SR 995
700 1992 now 1.73 mi; Fairfield Ave; signed as CT 130 westbound, Fairfield and Bridgeport
700 1970 1973 Temporarily assigned to CT 8/25 freeway; from I-95 to Lindley St
700 1951 19xx "Local Roads" in Waterbury; location unknown
701 1970 10/11/1985 0.40 mi; "relocated Water Street and Housatonic Ave, near CT 8/I-95, Bridgeport"; N/S frontage roads from Main St to Water St, and Water St northerly to Fairfield Ave (other sources say added 1973)
701 19xx 3/29/1963 Ashley Falls Rd, from US 7 to MA SL, North Canaan; became SR 832
701 1932 1935 North St, from US 44 to Central NE RR, Norfolk; became part of original CT 49; now CT 272
702 1966 now 0.81 mi; Wharton Brook connector; I-91 exit 13 to US 5, long exit ramp, Wallingford
702 1950 1962 Silver St, Waterbury; became US 6A
702 1932 1941 Sharon Station Rd, from NYSL to vic. Hwy Dept. driveway, Sharon
703 1968 now 0.20 mi; Old Litchfield Rd, SE from CT 42 to CT 63, Bethany; was old CT 63
703 1964 1967 Old SR 503 in Beacon Falls; became part of CT 42
703 1932 1962 Cream Hill Rd, from CT 128 to Rattlesnake Rd, Cornwall
704 1969 9/15/1987 was CT 142; became CT 337; New Haven and E. Haven
704 1963 1967 Locust Ave, New Canaan, from CT 124 to CT 123; became SR 803
704 1962 1963 Forest St, New Canaan
704 1932 1962 Essex Hill Rd, isolated, S of CT 4, Cornwall
705 1973 now 2.63 mi; Ocean Ave, W. Haven; formerly part of CT 122
705 1966 1973 Modern-day SR 705, but used segment of Platt Ave. instead of Platt Court
705 1932 19xx Milton Rd, from US 202 to Maple St, Litchfield; toward village of Milton (conflict: in E&K doc, but not on spreadsheet)
706 1995 now 0.82 mi; N. frontage rd. from Howe St to CT 10, New Haven; signed as CT 34 WB.
706 12/31/1984 1995 N. frontage rd, from Howe St. to Orchard St, New Haven; extended in 1995
706 9/1/1971 1972 W. Main St. and E. Main St, from CT 71, Meriden to CT 66 fwy, Middlefield; was extended west from US 5; old CT 66
706 1967 1971 E. Main St from US 5, Meriden, to CT 66 fwy, Middlefield; was SR 504; old CT 66
706 1932 1963 Lakeside Rd, from Washington TL to today's CT 209, Morris; now part of CT 109
707 1970 now 3.62 mi; Whitney Ave, N from New Haven TL to CT 10, Hamden; was CT 10A
707 1964 19xx former SR 607, Durham
707 19xx 1962 short section of Benton Rd, S from CT 109, Morris
708 1970 now 0.32 mi; Old Gate Lane, from I-95 NB exit 40 offramp to Woodmont Rd, Milford
708 1955 3/29/1963 E. Main St, from US 1 to CT 113, Stratford; formerly CT 8A; now part of CT 110
708 19xx 1955 Parsonage St, from CT 99 to Main St, Rocky Hill (but see also SR 780; possible typo)
709 1962 now 0.27 mi; S. Main St, from CT 63 to CT 8 NB ramp, near 8/63/68, Naugatuck; old CT 63
709 1932 3/12/1952 0.28 mi; E. Albert St and Harwinton Ave, Torrington
710 1962 now 0.31 mi; N. Main St, from SR 723 to CT 8, near 8/63/68, Naugatuck; old CT 8
710 1943 1955 Torringford St, Torrington and Winchester, from CT 4 to US 44; became part of CT 183
710 1932 1943 Torringford St, from Torrington TL to US 44; extended S in 1943; now part of CT 183
711 1963 now 0.81 mi; Huntington Tpke, N from Penny Ave (SR 743) to CT 108, Trumbull, Kept number across reclassification
711 9/27/1951 1963 Nearly same as today's SR 711; details missing. Was part of CT 65A. Changed noted in 1963.
711 1932 1935 Town Hill Rd, from Burdick Rd to US 44, New Hartford; now part of CT 219
712 1962 now 0.24 mi; Bridge St, from CT 110 to CT 34, crosses Housatonic River, Shelton
712 19xx 1941 Bridge St, Hartland; road no longer exists
713 19xx now 0.27 mi; Congress St, north frontage road at 15/59, Fairfield
713 19xx 1970 Allings Crossing Rd, W. Haven; near I-95 at CT 162
713 1962 1962 "David Humphrey Bridge" in Seymour; name no longer exists; probably Broad St. Became part of CT 313, and provided basis for number even though SR 563, another portion, was much longer.
714 1999 now 5.00 mi; Bridgeport Ave, from Huntington St to CT 108, Shelton. CT 108 was rerouted slightly, shaving a city block from SR 714. The first 0.32 mile is locally maintained.
714 1975 1999 5.06 mi; Bridgeport Ave, from Huntington St to CT 110, Shelton. Extension of existing SR 714. Was CT 8.
714 1951 1975 0.81 mi [1971]; Bridgeport Ave. and Center St, from vic. CT 8 exit 13 to CT 110; kept number across reclassification; was CT 8.
715 1968 now 0.51 mi; Universal Dr/Montowese Ave, from I-91 exit 9 E to CT 103, North Haven
715 1967 1967 same as today's SR 715; was reportedly changed to SR 802, but then reverted the next year.
715 1952 1963 2.49 mi; Compo Rd South and Hills Point Rd, Westport; was part of CT 136
715 19xx 1952 somewhere in Hamden
715 19xx 1941 somewhere in Norfolk
716 9/1/1971 1975 Waterbury Rd, Southington and W. Main St, Meriden; from CT 322 to CT 71; was CT 66
716 19xx 1969 Mill St, Hartland; under arbitration for years; became SSR 488
717 1952 now 1.15 mi; Dixwell Ave, from CT 10/SR 707 to US 5, Hamden. Kept number across reclassification.
717 19xx 1941 somewhere in Suffield
718 1970 now 0.27 mi; Goose Ln; N of I-95 to US 1, E of CT 77, Guilford
718 19xx 1962 Water St and Railroad St, W from CT 126 across Housatonic R., Canaan
719 10/17/1992 now 2.02 mi; Main Ave, from CT 123 to US 7 at Grist Mill Rd, Norwalk; was US 7
719 1971 1973 Honeyspot Rd, Stratford; was SR 409
719 19xx 1969 0.94 mi; Walnut Hill Rd, Hartland, W from CT 179; may have been truncated from earlier SR 719
719 1943 1944 Granville Rd, Hartland; became part of CT 179
720 1972 now 0.26 mi Devine St; N frontage Rd for CT 40/US 5
720 1935 1962 Indian Mountain Rd (fka Wagner's Corner Rd); US 44 to TL, Salisbury
721 10/21/1982 now 1.85 mi; North St; from CT 67 in Seymour to Old Tpke Rd in Beacon Falls; extended north from old CT 8 when new CT 8 opened. Was 2.32 mi in 1990, and extended to CT 42
721 1964 10/21/1982 North St, from CT 67 to CT 8, Seymour; was SR 511
721 1944 1960 Gavitt Rd, Barkhamsted, and Barkhamsted Rd, Granby; became CT 219
721 1940 1944 extended onto N. Canton Rd, Canton. Became part of CT 179. Gavitt Rd became CT 219
721 1935 1940 Canton-Granby Rd (now Gavitt Rd), Barkhamsted; part of today's CT 219
722 1972 now 0.37 mi; Chopsey Hill Rd (former Reservoir Ave), N from US 1 to CT 8/25 exit 5, Bridgeport
722 1935 1963 Hill Rd, from CT 118 to TL, Harwinton; portion assigned in 1936; became CT 222. Portion also assigned in 1961.
723 1971 now 0.16 mi; Union St/Golden Ct, N from SR 710 to SR 710, near CT 68, Naugatuck
723 1935 1962 Cogswell Rd, Town St, N. Cornwall Rd, and Lake Rd, from Cream Hill Rd (old SR 703) almost to CT 43. Marked in 1940 map as "Proj. 31-11".
724 2023 now 1.11 mi; from Orange St. to I-91 and I-95, New Haven; formerly part of CT 34 and the Oak Street Connector freeway
724 1993 1998 0.04 mi; E. Washington Ave bridge over Pequonnock River, Bridgeport
724 1972 1976 Mt. Carmel Connector, when it was completed only to US 5; became part of CT 40
724 1936 1962 Sand Rd, Canaan; was CT 126
725 1972 now 0.08 mi; part of Hartford Tpke, frontage for CT 15 at CT 22, North Haven
725 1954 3/29/1963 Wilson Hill Rd, Glen Rd, and Newtown Tpk, from Sherman Tpk to Cross Hwy, Redding; was CT 57
726 1973 now 0.10 mi; Jefferson St, S. frontage road for CT 15 at CT 59, Fairfield
726 1936 1962 Johnson Rd, from CT 126 to just E of Beebe Hill Rd, Canaan
727 1962 now 1.26 mi; Pershing Dr and Bridge St, N from CT 8 to CT 115, Derby and Ansonia; was SR 514
727 1955 1962 reported as Mill St and Wooster St, Derby; possibly included in newer route
728 1963 now 0.88 mi; Derby Ave, N from CT 8 to CT 313, Seymour
728 1962 1963 Derby Ave and River St, Seymour; old CT 8; River St portion became part of CT 313
728 1955 19xx "Temporary Rd on the Harbor Front Project", New Haven
729 1973 now 0.58 mi; Broadway, US 5 E to CT 103, North Haven; was part of CT 22
729 1956 1962 Edison Rd, from CT 25 to CT 127, Trumbull
730 1973 now 1.30 mi; Huntington Tpke, from CT 127 to SR 743, near CT 8/15, Bridgeport; was CT 8
730 9/1/1957 1964 now part of CT 68, from Cheshire to Wallingford
731 1984 now 0.31 mi; Main St, from Bridgeport TL to CT 111/CT 15, Trumbull.
731 6/1/1982 1984 extended over Main St, old CT 25 to CT 15. 3.18 mi in Bridgeport was deleted in 1984.
731 1973 6/1/1982 Main St, Bridgeport, from Madison Ave to Capitol Ave; was CT 25 (1971 log shows 0.83 mi)
731 1957 1963 Indian Well Rd, Shelton; became SSR 408
732 1962 now 1.05 mi; Black Rock Tpk, N from US 1 to CT 58, Fairfield; I-95 exit 24
732 1959 1960 Sherwood Is. Connector; is now SSR 476
733 1962 1993 0.58 mi; Mill St, NW from CT 100 to CT 80, E Haven
733 1959 1960 Hammonasset Connector; is now SSR 450; was unnumbered for a few years
734 1974 now 0.58 mi; Daniels Farm Rd; from CT 127 to CT 25 exit 9, NB side, Trumbull
734 1962 1962 Great Hill Rd, Ansonia and Seymour; became part of CT 334
735 1974 now 0.21 mi; Forbes Place/Kimberly Ave; From US 1 to CT 100; frontage at I-95 (exit 51), E. Haven
735 1962 1963 Wakelee Ave and Franklin St, Seymour; became part of CT 334
735 1960 1962 Elizabeth St, Seymour Ave, and Wakelee Ave, Derby, Ansonia and Seymour; old CT 8
736 1962 now 3.64 mi; Loop of CT 162 (to Morningside), Milford; includes Buckingham Ave, Melba St, Edgefield Ave and Merwin Ave
737 2/1/1979 now 1.52 mi; Seaside Ave, SW from CT 162 to Silver Sands state park, Milford
737 1968 2/1/1979 shorter version of SR 737; details missing; became SR 747 (1971 log says 3.93 mi; US 1 to CT 162)
737 1962 1968 Naugatuck Ave, Milford
738 1973 now 0.80 mi; E. Center St, E from CT 150 to I-91 exit 14, Wallingford
738 8/1/1962 1963 Mountain Rd, Prospect, and Bethany Mountain Rd, Cheshire; became part of CT 42
739 1975 now 0.21 mi; Park St, from SR 734 to CT 25 exit 9, Trumbull
739 1962 1967 New Canaan Ave. from CT 123 to old US 7, Norwalk; became SR 802; now part of CT 123
740 7/23/1962 now 3.26 mi; Cedar St, Brushy Plain Rd, and Totoket Rd; N from US 1 in Branford to CT 80, North Branford; I-95 exit 54
741 1973 now 0.09 mi; Main St, from Woodward Ave (I-95 exit 50) to CT 337, New Haven
741 1962 3/29/1963 Cedar Rd, Wilton, and Northfield Rd, Weston; became part of CT 53
742 1993 2006 0.71 mi; Arch St/SoundView Dr/Field Point Rd, from I-95 exit 3 to US 1, Greenwich
742 6/1/1979 1989 0.37 mi; Frontage road S from CT 42, short, E of CT 8, Beacon Falls
742 1962 1963 Westport Tpke, Fairfield, and Westport Rd, Easton; became part of CT 136
743 6/1/1979 now 0.64 mi; Penny Ave; east frontage for CT 8 between SR 711 and SR 108, Trumbull
743 1962 1963 Elm St, Prindle Ave, Pulaski Hwy, Ansonia Rd, and Fountain St, Ansonia to New Haven; became CT 243
743 19xx 1962 became part of "CT 10 temp", Hamden
744 1962 1974 0.36 mi; Main St #2, I-95 to CT 337, New Haven, connects CT 142 to CT 100; was old US 1
745 1970 now 1.21 mi; First Ave and Kimberly Ave, from I-95/CT 122 to CT 10/I-95, New Haven
745 1967 1970 deleted a section of Kimberly Ave. The Boulevard portion became part of CT 10
745 1962 1967 Elm St, Boulevard and Kimberly Ave, West Haven and New Haven (now Ella T. Grasso Blvd)
747 2/1/1979 1994 1.13 mi; Naugatuck Ave, US 1 to Stowe Ave, Milford; was part of SR 737
747 1962 3/29/1963 Old Hwy and Sharp Hill Rd, Wilton; Sharp Hill Rd became part of CT 106
748 1962 3/29/1963 East Ave, New Canaan; New Canaan Rd and Belden Hill Rd, Wilton; was SR 403 and SR 414; became part of CT 106
749 1964 now 0.21 mi; Lucy St, from CT 63 to CT 69, Woodbridge
749 1962 3/29/1963 Middlesex Rd, Darien, and Old Stamford Rd, New Canaan; became part of CT 106
750 1973 12/24/1987 extended over Washington Ave, North Haven, when CT 22 was relocated from Broadway to Clintonville Rd. Became CT 103.
750 1966 1973 Maple Ave and Quinnipiac Ave, from Broadway in North Haven to CT 80 in New Haven; extended over old CT 17 and US 5A
750 1964 1966 Quinnipiac Ave, from CT 17 to New Haven TL, North Haven; was SR 560
751 1963 1992 0.11 mi; Stratford Ave. Bridge, near 8/95, Bridgeport, under arbitration; now part of CT 130
751 19xx 1934 now part of CT 71, Berlin
752 1973 1974 Barnes Rd, Wallingford; was CT 68
752 1932 1962 Brook St, from CT 3 to CT 99, Rocky Hill
752A 1973 1974 1.57 mi total; known as 752A-1 thru 752A-4; bits of Barnes Rd orphaned by CT 68 relocation, Wallingford (not on spreadsheet)
753 19xx now 0.17 mi; SB part of Dixwell Ave near Shepard Ave, Hamden. Signed as CT 10 SB.
753 1932 1965 1.24 mi; Dividend Rd, Rocky Hill
754 1936 1940 Shunpike and Maple St, Cromwell, Rocky Hill, and Wethersfield; became CT 3
754 1932 1936 Maple St, from CT 160 to Gilbert Ave, Rocky Hill; now part of CT 3
755 19xx 19xx near I-95/Ct 100, E. Haven (not on spreadsheet)
755 1932 1941 Old Main St, Rocky Hill, from 160 to Wethersfield TL
756 1932 1962 Washington St, near CT 99 and CT 160, Rocky Hill
757 1932 1962 Riverview Rd, near CT 99 and CT 160, Rocky Hill
759 1932 1963 Jordan Lane, from Berlin Tpke to Hartford Ave, Wethersfield; most of it became CT 314
760 1932 1971 Robbins Ave and Maple Hill Ave, Newington, arbitration lasted until 1970; Maple Hill Ave. became SR 537 (also in Groton, 1961, h533hc)
761 1932 1935 Farmington Ave, from Allen St to Corbin Ave, New Britain
762 1935 1964 Cooke St, Plainville and Farmington; became SR 562
762 1932 1935 Cooke St, Plainville and Farmington; extended in 1935
763 19xx 1962 short part of Central St N from CT 72, Bristol
764 1932 1962 short section of River Rd, S from Canton TL, Avon
765 1932 1963 Maple Ave and Dowd Ave, Canton; became SR 565
766 <=1948 1961 River Rd, Canton; became CT 179
767 19xx 1965 0.08 mi; Old Farms Rd, from US 44 to Arch Rd, Avon; arbitration
767 <=1948 19xx Poultry Farm Rd, W from CT 10, Avon; not on spreadsheet
768 1932 1962 Mountain Rd and Sedgwick Rd, from CT 4 to Main St, W. Hartford
769 19xx 1992 1.21 mi; Connecticut Ave, WB only, Bridgeport and Stratford; now part of CT 130
769 19xx 1964 S. Main St, from New Britain Ave (old US 6) to W. Hartford TL; became SR 569; now part of CT 173
770 3/29/1963 1992 3.66 mi, Conn. Ave and Stratford Ave, old US 1, near 113/108/130, Bridgeport and Stratford; canceled when CT 130 created
771 3/29/1963 1992 1.97 mi; Post Rd/Fairfield Ave, E from US 1 to I-95, Fairfield and Bridgeport; became part of CT 130
771 19xx 1944 somewhere in Canton
772 19xx 1944 somewhere in Canton
773 <=1948 1963 Church St, from Main St. to Wolcott Hill Rd, Wethersfield
774 19xx 1944 somewhere in Berlin
775 19xx 1940 Wells Rd, Newington and Wethersfield; became part of CT 175
776 19xx 1962 Ashwell Ave, Rocky Hill
777 19xx 1962 Garden St, Rocky Hill
778 19xx 1934 somewhere in New Britain; became part of CT 174
779 19xx 1962 Grimes Rd, Rocky Hill
780 19xx 1962 Parsonage Rd, Rocky Hill
781 19xx 1962 Bailey Rd, Rocky Hill
782 19xx 1963 Waters Ave and Orchard St, CT 3 to CT 160, Wethersfield and Rocky Hill
783 <=1948 1962 Gladding St, Alling St, and Harris St, Berlin
783 1934 1935 old CT 72, Berlin (West Ln and Hart St?)
784 <=1948 1962 Huckleberry Hill Rd, from Chevas Rd to Canton TL, Avon
785 1936 1963 Nott St, Ridge Rd to Hartford Ave, Wethersfield. Part of this became SSR 422.
786 1935 19xx 0.41 mi; now Mill St, CT 173 to CT 175, Newington; seen in 1967 map
786 19xx 19xx Fienemann Rd, Farmington, late 1930s - probably SR 789
787 1936 1962 part of Milford St, Burlington, S from CT 4; became part of CT 69
788 1936 1962 Hayes Rd (fka Highland St), CT 160 to TL, Rocky Hill
789 7/30/1962 1964 Birdseye Rd, Farmington; became SR 549
789 1937 7/30/1962 "by-pass rd" and Fienemann Rd, Farmington
789 1936 1937 new "by-pass rd", probably Birdseye Rd, Farmington
790 05/30/2014 now 0.9 mi; South State St, from Greenwich Ave to Elm St, Stamford. This one-way road, 2 to 4 lanes wide, parallels I-95 and serves the Stamford Transportation Center. It intersects SSR 493.
794 1964 now 0.96 mi; Branford Connector (aka "Cherry Hill Connector"), I-95 exit 53 to US 1/CT 146, Branford; Essentially a long exit ramp. Was SR 994
796 1964 now 2.88 mi freeway; Milford Parkway, N from US 1 to CT 15, Milford; was SR 996
800 1966 now 11.83 mi; Old CT 8, N from CT 118 to US 44, Litchfield, Torrington, Winchester; was extended in 1969 and 1970 as more segments of the CT 8 freeway opened
800 1962 3/29/1963 N. Elm St, Canaan; became part of a realigned US 7 (which was reverted back the next year)
801 1964 now 2.61 mi; E. Main St; was part of CT 70
801 1932 1962 Pinney Rd and Maple St, from vic. Billings Rd to CT 190, Somers
802 1974 19xx working number involved with proposed US 7 relocation in New Milford
802 1967 1970 New Canaan Ave. from CT 123 to old US 7, Norwalk; was SR 739; became part of CT 123
802 1962 1963 Wapping Wood Rd, Ellington and Ellington Rd, S. Windsor; became CT 286 and part of CT 74.
802 1932 1962 Frog Hollow Rd, Ellington. Might be portion now known as Main St, W of CT 140/CT 286 connector.
802A 19xx 1944 Pinney St, from Windermere Ave to [end of maintenance] 7293 ft. [1.25 mi] north; part of today's CT 286
803 1967 11/16/1981 Locust Ave/Forest St, center New Canaan; was SR 704
803 1932 1962 Ellington Ave, short section, Ellington
804 1962 1/30/1984 0.53 mi; Park Ave, Danbury; was US 7; reportedly included portion of Downs St
804 1932 1951 Vernon Ave, from CT 30 to Grand Ave, Vernon; or South St, from Vernon Ave to CT 30
805 1976 now 2.76 mi; Federal Rd, south of I-84 near US 7/202 north, Danbury. Widened in 1997.
805 1962 1976 Federal Rd, Danbury, from White St to vic. I-84 interchange; was US 7; in 1976, extended along new old US 7
805 1932 1951 Vernon Ave, from CT 30 to Grand Ave, Vernon; or South St, from Vernon Ave to CT 30
806 1962 now 1.54 mi; Newtown Rd, Danbury (to I-84 exit 8); old US 6
806 193x 1950 New State Rd, Manchester; became SR 437; from late 1930s
807 1990 now 0.50 mi; S. Main St and Main St, from CT 254 to CT 222, Thomaston
807 1970 1990 S. Main St and Main St (possibly N. Main St as well), Thomaston; part of this became part of CT 222
807 9/8/1967 1970 S. Main St, Thomaston; was CT 8; extended in 1970
807 1962 1963 Bolton Center Rd and Watrous Rd, from US 6 to Brandy St, Bolton; also included part of Clark Rd; part of it is now CT 85; E. of Clark Rd went to town in Mar. 1962.
808 19xx 1/30/1984 0.34 mi; Lake Ave, E from US 6/202, Danbury
808 19xx 1962 somewhere in Danbury, probably West St; became part of US 202
808 19xx 1962 Long Hill Rd, N from US 6, Andover; from c. 1937
809 1970 now 0.74 mi; Riverside Ave; N from US 1 to CT 123, Norwalk; formerly part of CT 123
809 1959 1963 Moved to new Storrs Rd section near CT 32, Coventry and Mansfield; old route is Tolland Tpke and Jones Crossing Rd. Became part of CT 195.
809 1935 1959 Merrow Rd, Tolland, and Tolland Tpke, Mansfield
809 1932 1934 today's US 6 between CT 87, Andover, and CT 66, Columbia; was part of NE-3; became part of US 6A
810 1969 now 0.43 mi; Watertown Rd, NE from US 6 to CT 254, Thomaston
810 1948 1964 Silver Lane and Roberts St, E. Hartford and Manchester; was US 6; became SR 502
810 19xx 1934 somewhere in Hebron
811 1969 now 0.11 mi; Cedar Rd; connector from CT 106 to CT 53, Wilton
811 19xx 1962 very short isolated part of Mill Rd, Columbia
812 1969 now 0.11 mi; Barnes Rd, from US 7 to CT 63, Canaan; part of old CT 63
812 1932 19xx Mansfield City Rd, from Valley Rd to Crane Hill Rd, Mansfield; isolated; E&K recommended delete
813 1962 now 0.63 mi; Fairfield Drive, W from CT 39 to NY state line, New Fairfield
813 1962 1962 somewhere in Newtown, old CT 34
813 19xx 1947 somewhere in Coventry and Mansfield
814 1970 1994 0.58 mi; West Ave/Conn Ave, from I-95/US 7, Norwalk; was part of US 1
814 1932 1962 short section of School St, E from CT 31, Coventry
815 1964 9/6/1982 0.93 mi; N. Main St, Plymouth; was SR 513
816 1966 now 2.22 mi; Church Hill Rd and Glenn Rd, E from US 6 to Southbury TL, Newtown; was US 6A; under arbitration since 1960s; judgement in favor of town on Feb. 20, 1981. (Southbury's portion of US 6A was deleted on May 4, 1965.)
816 1959 1962 Andover Rd and Wall St, Hebron; Hebron Rd, Andover; became CT 316
817 1962 1/13/1986 1.92 mi; Cross Hwy; E from CT 107 to CT 58, Redding; note: spreadsheet says was SR 478
818 1969 1/12/1986 0.19 mi; Sherman Tpk, NW from SR 817 to CT 107, short, Redding
819 3/1/1979 now 3.16 mi; Granville Rd; N from CT 20/CT 179 to Mass SL, Hartland; was part of CT 179
819 1969 1971 0.13 mi; Garage Rd, from SR 823 to US 6, Southbury. Became part of SSR 492.
819 19xx 1962 Lake Rd, from West St to CT 87, Columbia
820 1963 2000 0.37 mi; isolated segment of Camps Flat Rd, Kent; arbitration since 1960s; was part of CT 130
820 19xx 1935 George Heck Rd, Union
821 1963 2000 0.35 mi; isolated segment of Camps Flat Rd, Kent; arbitration since 1960s; was part of CT 130
821 19xx 1948 somewhere in Union
822 3/1/1979 now 3.62 mi; W Mountain Rd/Barry Ave/High Ridge Ave/Catoonah St, E from NY SL to CT 35, Ridgefield; was part of CT 102
822 1970 1972 Litchfield St and Grand St, Thomaston; was part of CT 254, which was relocated
822 19xx 1962 short part of Bishop Rd and Boston Hill Rd, near Townsend Rd, Andover; became part of SR 603
823 1977 10/15/1983 1.65 mi; Main St, E from CT 172 to US 6, Southbury
823 1971 1977 truncated from older SR 823, deleted Main St, Southbury
823 1967 1971 truncated from older SR 823, Southbury
823 1963 1967 Main St, part of old US 6, Southbury, truncated in 1967
823 1932 1962 Maple St and School St, from vic. Lindy Farm to CT 190, Somers
824 12/31/1984 now 0.29 mi; New State Rd, N from Union Carbide Rd to US 6/202 near I-84 exit 2, Danbury
824 1970 1975 new road in Watertown; became part of CT 262
824 1934 1962 1.05 mi, Hampden Rd, CT 83 to SL, Somers
825 1971 1977 1.57 mi; White Turkey Rd, Brookfield; was SR 412
825 1935 1947 Fish Point Rd, Union; became part of CT 89
826 1973 19xx Creeping Hemlock Rd, project in Norwalk at the old US 7/CT 15 interchange
827 1971 now 3.44 mi; South Kent Rd, S from CT 341, E of US 7 to New Milford TL; arbitration ended Sept. 1, 1987; town won; was SR 475
827 1962 1964 West St and West St Ext, Vernon; became SR 527
827 1936 1962 West St, from CT 30 to Grand Ave, Vernon
828 1971 9/3/1979 0.10 mi; N. State St, Stamford; from Washington Blvd. to Atlantic St.
828 1936 1964 Battle St, Somers; at some point became Turnpike Rd; became SR 528
829 1971 9/3/1979 S. State St, Stamford; from Greenwich Ave. to Atlantic St. In 2014, became part of SR 790
830 11/16/1981 1998 0.63 mi; Union St (WB only), W from Hamilton Ave to SR 847, Waterbury
830 1962 11/16/1981 E. Clay St, Waterbury
831 1973 3/8/1985 relocation of Plattsville Ave, displaced by onramp from CT 123 to US 7, Norwalk
831 3/29/1963 1964 Railroad St and Ashley Falls Rd, North Canaan; was US 7 (which was moved to Elm St); became US 7 again
832 3/29/1963 now 0.32 mi; Ashley Falls Rd, NW from US 7 to Mass SL, North Canaan; continues as MA 7A; was SR 701
833 3/29/1963 now 1.23 mi; Clayton Rd, NE from US 7 to Mass SL, North Canaan; was part of CT 124
834 3/29/1963 now 0.14 mi; Clayton Rd, isolated E of SR 833 between Mass SL crossings, North Canaan; was also part of CT 124
835 3/29/1963 now 1.00 mi; West Lane, SW from CT 35 to NY SL, Ridgefield; was CT 35A
836 1971 now 0.13 mi; Columbus Rd, west frontage, 8/4/202, Torrington
837 1971 now 0.05 mi; Christopher Rd, east frontage, 8/4/202, Torrington
838 1972 now 0.07 mi; Veterans Hill (fka Town Hall Hill), SE from US 6 to CT 63, Watertown
839 3/29/1963 now 0.83 mi; Milltown Rd; W from CT 39 to NY SL, New Fairfield; was part of CT 39
840 1976 now 0.85 mi; White Turkey Rd Ext, N from SR 805 to US 202 near US 7/I-84, Brookfield
841 1973 now 0.16 mi; Downs St; E from I-84 to 37/39/53, Danbury; was part of US 202
842 1973 11/23/1982 Coal Pit Hill Road; off CT 53, Danbury; formerly CT 58A, then US 202A
843 1977 now 0.16 mi; Park Place West, S from CT 8 to US 44/SR 800, Winchester; to motorists, it serves as southbound CT 8
844 7/26/1967 now 3.33 mi; Meriden Rd, E from CT 69, Waterbury, to CT 322, Wolcott; was US 6A
845 7/26/1967 now 1.64 mi; Chase Pkwy, E from CT 64 to Sunnyside Ave, near I-84, Waterbury; was US 6A
846 1980 now 1.30 mi; W. Main St and Watertown Ave; N from SR 847 to CT 73, Waterbury; old S end of CT 73
846 1966 1980 W. Main St and Watertown Ave; as now, but 0.21-mi SB section leading to W. Main St was moved to SR 849
846 1965 1966 Watertown Ave; was CT 73
847 1966 now 7.46 mi; Main St and Waterbury Rd, N from Platts Mill Rd in Naugatuck to CT 262 in Waterbury
847 1965 1966 Main St and Waterbury Rd; was part of CT 262, CT 8, and SR 848
848 1965 now 3.31 mi; Waterbury Rd; N from CT 262 to CT 254, Thomaston; was CT 8
848 1964 1965 old CT 8, from I-84 to CT 262, Waterbury; part of this was given to SR 847
849 19xx now 0.21 mi; Watertown Ave, one-way SB, from Watertown Ave to W. Main St (SR 846)
849 1964 1966 temporarily assigned to CT 8 freeway, Torrington
850 3/29/1963 now 0.18 mi; Patterson Rd; from NY SL to CT 37, New Fairfield. Was SR 450
851 1972 1977 0.12 mi; Buxton Farm Rd, E from CT 137, Stamford
851 1954 1959 Old CT 25 in Torrington (Litchfield St? or did it revert?) Spreadsheet says became CT 25
851 1932 1934 somewhere in Thompson
852 6/1/1982 2005 0.74 mi; N. Main St, N from CT 42 to CT 8, old CT 8, Beacon Falls
852 1955 1965 0.43 mi; Fish Rock Rd, Southbury; was US 6
852 1932 1934 somewhere in Thompson
853 1993 now 0.39 mi; Division St; from SR 727 to CT 115, Ansonia
853 1955 19xx old section of CT 25, New Milford
853 1932 1934 somewhere in Thompson
854 1955 1962 Grand, Litchfield and Northfield St, Litchfield and Torrington; became CT 254
854 1935 1944 E. Killingly Rd (Elliottville Rd), Killingly
854 1932 1934 somewhere in Thompson
854A 19xx 1962 somewhere in Litchfield near SR 854
855 1975 now 1.51 mi; Buckingham St; N from CT 73 to CT 262, Watertown
855 1968 1975 less of Buckingham St, Watertown (details missing); some given to CT 262
855 1964 1968 more of Buckingham St, Watertown
855 1955 1964 Buckingham St, Watertown; short portion N from CT 73
855 1932 1934 somewhere in Thompson. SR 851 thru 855 were removed in 1934 here.
856 1932 1962 Heritage Rd, Putnam (from CT 12 to CT 21)
856 1936 1944 Converse Rd, Putnam; became CT 21
857 1962 3/29/1963 old CT 134, from CT 25 (US 202) to CT 47; became part of extended CT 109
857 1956 1962 a short segment of Calhoun St, Washington. Was part of CT 134; now part of CT 109
857 1932 1944 Dayville Rd (now Park Rd), short segment parallel to RR tracks, Putnam
858 1932 1962 Murdock Rd, Pomfret; became SR 644 in 1974 after 12-year gap
859 1932 1968 0.48 mi; Williamsville Rd, from State Ave to CT 101, Killingly.
860 1/4/1999 now 1.07 mi; Mile Hill Rd (Wasserman Way), from CT 25 to SSR 490, Newtown; part of 25/I-84 connector road
860 6/11/1957 1963 Ripley Hill Rd, from US 44 to CT 181, Barkhamsted; became part of CT 318
860 1932 1934 Started as Pomfret Rd, between Station Rd and Spicer Rd, Hampton. Became part of CT 97 leading to US 44.
861 1932 1968 Ballouville Rd, CT 12 to Chestnut Hill Rd at Ballouville
862 1959 1963 South St, from US 6 to S. Main St, Plymouth; became part of CT 262
862 1932 1949 Wauregan Depot Rd (now Moosup Pond Rd), from CT 12/205 to railroad tracks, Plainfield
863 1959 1963 4.01 mi; became CT 263, from US 44 to Winchester Center
863 1932 1949 Kennedy City Rd (now School St), Plainfield; now part of CT 14. Kennedy City was a mill complex.
864 1955 1964 became SR 664, Plainfield to Killingly
864 1932 19xx Lake St, from CT 14 to vic. Miller St, Plainfield; extended later; became SR 664
865 1932 1964 0.39 mi, Plainfield Rd and Main St, Plainfield
866 1932 1962 Providence Rd, from CT 14 to CT 14A, Sterling
867 1964 now 1.20 mi; Clapboard Rd; NE from CT 133 to CT 67, Bridgewater; was CT 67A
868 1936 1964 Butts Bridge Rd, Canterbury; became SR 668
870 1947 1949 Scotland Rd, Sprague; became part of CT 97
871 1949 1962 Baltic-Hanover Rd and Hanover Rd, Sprague and Scotland; was CT 97
872 19xx 1962 Railroad St, W of 44/169 and N of CT 101, Pomfret
873 1932 1968 Soap St, Killingly, from CT 101 to CT 12
874 19xx 1935 Quinebaug Rd, Thompson; became CT 131
875 19xx 1962 Woodstock Rd, from CT 169 to Dugg Hill Rd, Woodstock
876 1962 1963 Extended from Ellington-Tolland TL to CT 190, Stafford; became part of CT 140
876 1936 1962 present-day CT 140, from CT 83 to Tolland TL, Ellington
900 19xx now 0.20 mi; Bonnie Circle, Groton; one-way WB from I-95 SB exit 86 to US 1.
900 1976 19xx section of Colman St, New London
901 19xx now 0.11 mi; one-way NB from CT 9 SB entrance to CT 9 NB off-ramp
901 1949 1950 North St, north from Maple St, Suffield; became part of CT 75; but also seen 1948
901 1932 19xx North St, from Mapleton Ave to Halladay Ave, Suffield; became part of CT 75
902 1950 1951 Mapleton Ave, Suffield; was CT 75
903 1961 1962 Hatchett Hill Rd (now SR 540), including small bit E of CT 187; E. Granby
903 1932 1954 small segment of Hatchett Hill Rd, W and E of CT 187; E. Granby
904 19xx 1935 somewhere in Windsor Locks
905 1959 1963 2.45 mi; Bloomfield Ave, Windsor; now part of CT 305; also seen 1948
905 1932 19xx About 1.5 mi; Bloomfield Ave, from Marshall Phelps Rd to Cook Hill Rd, Windsor; now part of CT 305
906 19xx 1993 0.06 mi; Saltonstall Ave, E. Haven; became part of CT 100
906 1932 1946 Wintonbury Ave, from CT 189 to vic. Filley St, Bloomfield
907 19xx now 0.10 mi; Connecticut Blvd; between exit from I-84 EB to I-84 WB entrance; one way
907 19xx 1965 0.83 mi; E. Weatogue Rd, from CT 185 to Riverside Dr, Simsbury
908 19xx now 0.16 mi; Colman St, between US 1 and the north frontage roads to I-95, New London
908 19xx 1962 Firetown Rd, from CT 309 to Great Pond Rd, Simsbury
909 7/23/1962 1963 became part of today's CT 309
910 19xx now 0.04 mi; Oak St between CT 2 WB exit and CT 94, Glastonbury
910 >1932 1935 Hall Blvd and Cottage Grove Rd, from CT 185 to CT 189, Bloomfield; became part of CT 218
911 19xx now 0.14 mi; one-way 2-lane western approach to SR 806 from I-84 exit 8, Danbury
912 1932 1946 Brewer St, from Main St to Forbes St, E. Hartford
913 19xx 1985 Vernon Circle, Vernon (destroyed in conjunction with I-84 reconstruction)
913 <=1948 1962 short section of Main St from CT 191 to RR tracks at Broad Brook, E. Windsor
913 1932 19xx Windsorville Rd and Main St, from Reservoir Rd north to Church St, E. Windsor
914 19xx now 0.06 mi; Otrobando Ave, bet. CT 2 and New London Tpke, Norwich
914 1935 1961 S. Main St, E. Windsor, from CT 140 S to US 5; now part of SR 510
915 19xx now 0.06 mi; frontage at CT 15/121
915 1959 1963 Tariffville Rd and Elm St (replaced Winthrop St), Simsbury; became CT 315
915 <=1948 1959 Tariffville Rd and Winthrop St, Simsbury
916 19xx now 0.16 mi; Forbes Ave; bet. NB and SB US 1, 0.1 mi. E of CT 337, New Haven
916 <=1948 1961 Pearl St and High St, from Main St to US 5, Enfield; became part of old CT 190
917 19xx 1993 Branford Rd, NE from CT 139 to CT 80, N. Branford; was CT 139A
917 <=1934 1957 0.44 mi; Naubuc Ave, from Salmon Brook bridge (near fuel tanks) to Main St, Glastonbury
918 1990 now 0.16 mi; one-way 2-lane eastbound segment of Farmington Ave. between CT 372 and CT 71A in Berlin.
918 19xx 1946 Depot St, E. Windsor
919 19xx now 0.25 mi; section of Berlin Tpke between CT 15 SB merge and CT 15 NB onramp.
919 1933 1935 School St and Wintonbury Ave to Windsor TL, Bloomfield; became part of CT 178
920 2005 now 0.04 mi; Grove St, from Columbus Blvd. to I-91 entrance, Hartford; also serves new convention center
920 19xx 1935 Simsbury Rd, W. Hartford; became part of CT 218; now part of CT 185
921 2009 now 0.23 mi; Waterfront Connector, from I-95 exit 50 eastbound to Fulton Terrace in New Haven. Part of the exit 49/50 reconstruction. Its log direction is West, which is rare for a two-way east/west road.
921 1935 1963 Blue Hills Ave, from Park Ave (old 184) to CT 189, Bloomfield; became part of CT 187
922 1935 1962 3.75 mi; Mountain Rd in Hartland and Granby; was to be deleted, but instead became SR 539
923 19xx 1962 0.17 mi; Gulf St, Milford
924 1946 1962 0.54 mi; Cherry Ave, from SR 923 to US 1, Milford; was US 1A
924 1952 1952 Mill St Viaduct, Waterbury; renumbered to SR 925
925 1957 1962 Old US 6A and new relocated US 6A, Waterbury; became part of I-84
950 19xx 1944 0.97 mi; windsor Locks Rd, E. Granby; was part of CT 20; probably Nicholson Rd, School St
988 1963 1964 Whitehead Highway, Hartford; was CT 9; became SR 598
990 19xx 1964 CT 10 connector from I-84, Southington; became SR 597
991 1963 1964 Danielson Connector, Killingly; formerly SR 590; now part of I-395
993 1963 1964 Montville Connector, Montville and Waterford; became SR 693
994 1963 1964 Branford Connector, Branford; became SR 794
995 1963 1964 Connecticut Turnpike, from E. Lyme (future 95/395 split) to end of turnpike at US 6 in Killingly; became SR 695. Most of it became CT 52 shortly afterward.
996 1963 1964 Milford Parkway (formerly "Radial Road"), Milford; became SR 796
997 1940 1948 Wilbur Cross Highway, E. Hartford through Union; became CT 15
998 1940 1948 Wilbur Cross Parkway, Hamden thru E. Hartford; was SR 1000; became CT 15
999 1938 1948 Merritt Parkway; became CT 15
1000 1940 1940 Merritt Parkway; became SR 998
1001 1939 1940 Wilbur Cross Parkway (and Highway), Meriden through Union; became SR 997

Sources

I've collected these routes from official Connecticut highway logs, town maps, state highway department documents, newspaper articles, and "the Spreadsheet": a nearly complete list of route changes from 1933 to 2000. I've even spotted some routes on commercial maps that have blown their cover. Before I had found these sources, however, Neil Kelly provided me dozens of street names from maps he found, and Paul Schlictman added "dates spotted" for several other routes. Hats off to them both.

Sometimes official sources conflict with each other (or even internally). Some information on 1930s routes may be difficult or impossible to obtain; in that case, "somewhere in (town name)" may be all I have.

Sources in detail:

Notes on 670/670A/670B

The sources conflict a bit here. The 1953 Day article looks a little more credible: State will agree to take over Brook St (1.9 miles) when reconstructed; and at same time Groton will accept:

Above I have 670 is now part of CT 215; 670A is Elm St; 670B is Main St.

Other notes

Although reclassification changed the district-based numbering system in 1962, the following routes happened to be in the right place and kept their old numbers:

Though it appears numbers were issued in order, the following numbers have (as far as I know) not ever been used:

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