# List of Special Service Roads in Connecticut

In the U.S. state of Connecticut, state highways are grouped into signed routes, unsigned special service roads (SSR), and unsigned state roads (SR). 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. Roads classified by the Connecticut Department of Transportation as special service roads are given an unsigned number designation between 400 and 499, or 1001.
| Number | Length (mi) | 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 | 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 Shelton | — | — | 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 |