# U.S. Route 1 in Connecticut

U.S. Route 1 (US 1) in the U.S. state of Connecticut is a major east–west U.S. Route along Long Island Sound. It has been replaced by Interstate 95 (I-95) as a through route, which it closely parallels, and now primarily serves as a local business route. Despite its largely east–west orientation, it is part of a north–south route and is mostly signed north–south.
Most of US 1 through Connecticut encompasses its predecessor, the Boston Post Road, and, in many towns, it is still named Boston Post Road (or Post Road).

## Route description

US 1 in Connecticut largely parallels I-95 and has many interchanges with it. The route passes through each city and town of Connecticut bordering the Long Island Sound (in addition to the town of Orange).
From Greenwich to Branford, US 1 is mostly a four- or six-lane principal arterial road (with some two-lane sections in dense areas). From Branford to Stonington, US 1 it a two- or four-lane minor arterial road.
US 1 is known as Boston Post Road or Post Road for the majority of its length, but it also encompasses other local street names. The route is known as Putnam Avenue in Greenwich; Tresser Boulevard, West Main Street, and East Main Street in Stamford; Connecticut Avenue in parts of Norwalk; Boston Avenue in parts of Bridgeport; and New London Road in parts of Groton. In Stonington, the route is known as Stonington Road, South Broad Street, and West Broad Street. US 1 is also known as Main Street in Branford and Clinton.

### Overlap with I-95

US 1 is concurrent with I-95 in two sections, both of which are river crossings. The western concurrency is between exits 68 and 70 from Old Saybrook to Old Lyme, where the two routes cross the Connecticut River via the Raymond E. Baldwin Bridge. The eastern concurrency is between exits 83 and 85 from New London to Groton, where the routes cross the Thames River via the Gold Star Memorial Bridge.
US 1's two other major bridge crossings closely parallel the I-95 crossings of those rivers. The Washington Bridge over the Housatonic River, connecting Milford and Stratford, as well as the Tomlinson Lift Bridge over the Quinnipiac River in New Haven, are a short distance away from I-95's Moses Wheeler and Pearl Harbor Memorial bridges, respectively.
US 1 also forms a frontage road for I-95 in parts of Fairfield, Stratford, and New London.

## History

US 1 generally follows the old Boston Post Road and turnpike roads built to replace it. Specifically, the Greenwich Road, chartered in 1792, was the part in Greenwich and became part of the longer New York-to-Fairfield Connecticut Turnpike (not to be confused with the contemporary Connecticut Turnpike) in 1806. The New Haven and Milford Turnpike (1802) continued from Milford to New Haven, and the New London and Lyme Turnpike (1807) connected Old Lyme with New London.

### Route 51

US 1 was originally built where it currently exists in Old Lyme and East Lyme. However, from 1949 to 1976, US 1 existed where I-95 currently exists in Old Lyme and East Lyme. From 1962 to 1976, this stretch of road was Route 51, which traveled for 9.4 miles (15.1 km) through Old Lyme and East Lyme and was known as the Boston Post Road. In 1976, US 1 returned to the 9.4-mile (15.1 km) stretch of road, thus eliminating the need for Route 51.

## Major intersections

| County | Location | mi | km | Destinations | Notes |
| Byram River | Byram River | 0.00 | 0.00 | US 1 south to NY 120A | Continuation into New York |
| Fairfield | Riverside | 4.83 | 7.77 | I-95 – New Haven, New York City | Exit 5 on I-95 |
| Fairfield | Stamford | 6.93 | 11.15 | Route 137 north (Washington Boulevard) to I-95 / Route 15 (Merritt Parkway) – Transportation Center, UConn | Southern terminus of Route 137; access to I-95 via SSR 493 |
| Fairfield | Stamford | 8.60– 8.66 | 13.84– 13.94 | I-95 / Route 106 north (Courtland Avenue) – Glenbrook, New Haven, New York City | Southern terminus of Route 106; exit 9 on I-95 |
| Fairfield | Community of Darien | 11.17 | 17.98 | I-95 – New Haven, New York City | Exit 11 on I-95 |
| Fairfield | Community of Darien | 11.56 | 18.60 | Route 136 east (Tokeneke Road) to I-95 south – Rowayton, South Norwalk, New York City | Western terminus of Route 136 |
| Fairfield | Community of Darien | 11.66 | 18.76 | Route 124 north (Mansfield Avenue) – New Canaan | Southern terminus of Route 124 |
| Fairfield | Town of Darien | 12.51– 12.87 | 20.13– 20.71 | I-95 – New Haven, New York City | Exit 13 on I-95 |
| Fairfield | Norwalk | 14.24 | 22.92 | I-95 – New Haven, New York City | Exit 14 on I-95 |
| Fairfield | Norwalk | 15.69 | 25.25 | Riverside Avenue (SR 809 north) | |
| Fairfield | Norwalk | 15.73 | 25.31 | US 7 to I-95 – New York City, Bridgeport | Exit 1 on US 7 |
| Fairfield | Norwalk | 16.17 | 26.02 | Route 123 north (Main Street) to US 7 north | Southern terminus of Route 123 |
| Fairfield | Norwalk | 16.54 | 26.62 | Route 53 north (East Avenue) to I-95 | Southern terminus of Route 53 |
| Fairfield | Community of Westport | 19.22 | 30.93 | Route 33 – Wilton, Saugatuck, Westport Station | |
| Fairfield | Community of Westport | 19.83 | 31.91 | Route 136 (Compo Road) – Easton, Saugatuck | |
| Fairfield | Town of Westport | 20.80 | 33.47 | Sherwood Island Connector (SSR 476 south) – Sherwood Island State Park | |
| Fairfield | Southport | 23.31 | 37.51 | I-95 – New York City, New Haven | Exit 19 on I-95 |
| Fairfield | Fairfield | 25.28 | 40.68 | To I-95 south – New York City | Access via Round Hill Road |
| Fairfield | Fairfield | 25.51 | 41.05 | Route 135 north (North Benson Road) | Southern terminus of Route 135 |
| Fairfield | Fairfield | 25.83 | 41.57 | Route 130 east (Post Road) | Western terminus of Route 130 |
| Fairfield | Fairfield | 26.23– 26.47 | 42.21– 42.60 | I-95 – New Haven, New York City | Exit 23 on I-95 |
| Fairfield | Fairfield | 27.16 | 43.71 | I-95 / Black Rock Turnpike (SR 732 north) – New Haven, New York City | Exit 24 on I-95 |
| Fairfield | Fairfield | 28.15 | 45.30 | Route 58 north – Easton, Redding, Bethel | Southern terminus of Route 58 |
| Fairfield | Bridgeport | 28.68 | 46.16 | Route 59 north – Easton, Upper Stepney | Southern terminus of Route 59 |
| Fairfield | Bridgeport | 30.36 | 48.86 | Route 8 south / Route 25 south | Access via Lindley Street; exit 2A on Route 8/Route 25 |
| Fairfield | Bridgeport | 30.85 | 49.65 | Route 8 / Route 25 | Access via SR 722; exit 2B on Route 8/Route 25 |
| Fairfield | Bridgeport | 31.43 | 50.58 | Route 127 (East Main Street) – Trumbull | |
| Fairfield | Community of Stratford | 34.03 | 54.77 | Route 108 north (Nichols Avenue) – Trumbull, Huntington | Southern terminus of Route 108 |
| Fairfield | Community of Stratford | 34.20 | 55.04 | Route 113 (Main Street) – Paradise Green, Shelton | |
| Fairfield | Community of Stratford | 34.86 | 56.10 | Route 130 west – Bridgeport | Eastern terminus of Route 130 |
| Fairfield | Community of Stratford | 34.91– 35.09 | 56.18– 56.47 | I-95 – New York City, New Haven | Exit 33 on I-95 |
| Fairfield | Community of Stratford | 34.91– 35.09 | 56.18– 56.47 | Route 110 north (East Main Street) – Shelton | Southern terminus of Route 110 |
| Fairfield | Housatonic River | 35.27– 35.43 | 56.76– 57.02 | Washington Bridge | Washington Bridge |
| New Haven | Milford | 36.31 | 58.44 | I-95 – New Haven, New York City | Exit 34 on I-95 |
| New Haven | Milford | 37.33 | 60.08 | Route 162 east – Downtown Milford | Western terminus of Route 162 |
| New Haven | Milford | 38.91 | 62.62 | To Route 15 (Merritt Parkway / Wilbur Cross Parkway) – New York City, Hartford | Access via Milford Parkway |
| New Haven | Milford | 39.20 | 63.09 | Route 121 north (North Street) – Orange | Southern terminus of Route 121 |
| New Haven | Milford | 40.01 | 64.39 | I-95 – New Haven, New York City | Exits 39A-B on I-95 |
| New Haven | Orange | 42.25 | 67.99 | Route 152 north (Orange Center Road) – Orange Center | Southern terminus of Route 152 |
| New Haven | Orange | 43.20 | 69.52 | Route 114 north (Racebrook Road) – Woodbridge | Southern terminus of Route 114 |
| New Haven | Orange | 43.95 | 70.73 | Route 162 west (Bull Hill Lane) – West Haven | Eastern terminus of Route 162 |
| New Haven | West Haven | 46.06 | 74.13 | Route 122 (Forest Road / Campbell Avenue) – Downtown West Haven, Westville | |
| New Haven | New Haven | 46.64 | 75.06 | Route 10 (Ella T. Grasso Boulevard) to I-95 – City Point, Hamden | |
| New Haven | New Haven | 48.25– 48.81 | 77.65– 78.55 | I-91 to I-95 – Hartford, New London, New York City | |
| New Haven | New Haven | 49.23– 49.41 | 79.23– 79.52 | Tomlinson Lift Bridge over the Quinnipiac River | Tomlinson Lift Bridge over the Quinnipiac River |
| New Haven | New Haven | 50.25 | 80.87 | I-95 south / Route 337 east (Townsend Avenue) – New York City, Lighthouse Point Park | Western terminus of Route 337; access to I-95 via SR 741; exit 50 on I-95; to Tweed New Haven Airport |
| New Haven | East Haven | 50.65– 51.23 | 81.51– 82.45 | I-95 – New London, New Haven | Exit 51 on I-95 |
| New Haven | East Haven | 51.32 | 82.59 | To Route 100 | Access via SSR 735 |
| New Haven | East Haven | 51.79 | 83.35 | Route 142 east (Hemingway Avenue) – Momauguin | Western terminus of Route 142 |
| New Haven | East Haven | 52.06 | 83.78 | Route 100 north (Main Street) | Southern terminus of Route 100 |
| New Haven | Branford | 53.85 | 86.66 | Route 142 west (Short Beach Road) – Short Beach | Eastern terminus of Route 142 |
| New Haven | Branford | 53.96 | 86.84 | To I-95 south – New York City | Access via SR 794 |
| New Haven | Branford | 54.06 | 87.00 | Route 146 east (Main Street) – Stony Creek | Western terminus of Route 146 |
| New Haven | Branford | 54.81 | 88.21 | To I-95 | Access via SR 740 |
| New Haven | Branford | 56.82 | 91.44 | I-95 – New London, New Haven | Exit 55 on I-95 |
| New Haven | Branford | 57.06 | 91.83 | Route 139 north (North Branford Road) – North Branford, Foxon | Southern terminus of Route 139 |
| New Haven | Guilford | 59.21 | 95.29 | Route 22 west (Notch Hill Road) – Foxon, North Branford | Eastern terminus of Route 22 |
| New Haven | Guilford | 61.76 | 99.39 | I-95 – New Haven, New London | Exit 57 on I-95 |
| New Haven | Guilford | 63.07 | 101.50 | Route 77 (Church Street) – Guilford, North Guilford | |
| New Haven | Guilford | 64.11 | 103.18 | I-95 / Route 146 (Boston Street) | Access via Goose Lane; exit 59 on I-95 |
| New Haven | Guilford | 64.35 | 103.56 | Route 146 west (Boston Street) – Guilford Center | Eastern terminus of Route 146 |
| New Haven | Madison | 67.85 | 109.19 | Route 79 (Durham Road) – North Madison, Durham | |
| Middlesex | Clinton | 71.67 | 115.34 | Route 81 (High Street) – Killingworth, Middletown | |
| Middlesex | Clinton | 72.52 | 116.71 | Route 145 (Old Post Road / Old Westbrook Road) – Winthrop | |
| Middlesex | Westbrook | 76.25 | 122.71 | Route 153 (Essex Road) to I-95 – Essex, Ivoryton | |
| Middlesex | Old Saybrook | 78.19 | 125.83 | Route 166 (Spencer Plain Road) to I-95 | |
| Middlesex | Old Saybrook | 79.52 | 127.98 | Route 154 north (Old Boston Post Road) – Shore Points, Cornfield Point, Knollwood Beach | Southern terminus of Route 154 |
| Middlesex | Old Saybrook | 80.52 | 129.58 | Route 154 south (Main Street) – Shore Points, Saybrook Point | Southern end of Route 154 concurrency |
| Middlesex | Old Saybrook | 80.95 | 130.28 | Route 154 north (Middlesex Turnpike) to I-95 south – Essex, Haddam, New Haven | Northern end of Route 154 concurrency |
| Middlesex | Old Saybrook | 81.98 | 131.93 | I-95 north – New London | Southern end of I-95 concurrency; exit 68 on I-95 |
| Middlesex | Old Saybrook | | | Route 9 north – Essex, Hartford | Southern terminus and exits 1A-B on Route 9; exit 69 on I-95 |
| Connecticut River | Connecticut River | 82.15– 82.63 | 132.21– 132.98 | Raymond E. Baldwin Bridge | Raymond E. Baldwin Bridge |
| New London | Old Lyme | 82.86– 83.34 | 133.35– 134.12 | I-95 north / Route 156 south (Shore Road) – New London | Northern end of I-95 concurrency; southern end of Route 156 concurrency; exit 70 on I-95 |
| New London | Old Lyme | 83.53 | 134.43 | Route 156 north (Neck Road) – Hamburg | Northern end of Route 156 concurrency |
| New London | East Lyme | 92.46 | 148.80 | Route 161 (Chesterfield Road / Flanders Road) – Chesterfield, Niantic | |
| New London | East Lyme | 92.97 | 149.62 | I-95 – New Haven, New London | Exit 75 on I-95 |
| New London | Waterford | 97.36 | 156.69 | Route 156 west (Rope Ferry Road) – Flanders, Niantic | Eastern terminus of Route 156 |
| New London | New London | 98.70 | 158.84 | Route 213 south (Ocean Avenue) – Harkness Memorial State Park | Northern terminus of Route 213 |
| New London | New London | 99.99 | 160.92 | Route 85 north (Broad Street) – Waterford, Hartford | Southern terminus of Route 85 |
| New London | New London | 100.89 | 162.37 | Route 32 north – Norwich, New London Waterfront District, State Pier, Hodges Square | US 1 acts as frontage roads for I-95; access to State Pier/Hodges Square via SR 635; access to Waterfront District via Eugene O'Neill Drive |
| New London | New London | 101.03 | 162.59 | I-95 south – New Haven | Southern end of I-95 concurrency; exit 83 on I-95 |
| New London | Thames River | 101.17– 102.26 | 162.82– 164.57 | Gold Star Memorial Bridge | Gold Star Memorial Bridge |
| New London | Groton | 102.21– 102.95 | 164.49– 165.68 | I-95 north / Route 12 north / Route 184 east to Thames Street – Providence, Gales Ferry | Northern end of I-95 concurrency; exits 85-86 on I-95; no southbound access to I-95 north/Thames Street; access to Thames Street via Bridge Street |
| New London | Groton | 103.22 | 166.12 | I-95 north / Route 349 south – Providence | Exit 87 on I-95; exit 3A on Route 349 |
| New London | Groton | 105.00 | 168.98 | South Road (SR 649 west) | |
| New London | Groton | 105.55 | 169.87 | Route 117 north (Newtown Road) to I-95 – Ledyard | Southern terminus of Route 117 |
| New London | Groton | 106.47 | 171.35 | Route 215 east (Groton Long Point Road) – Groton Long Point | Western terminus of Route 215 |
| New London | Groton | 108.62 | 174.81 | Allyn Street (SR 614 north) | |
| New London | Groton | 108.98 | 175.39 | Route 215 west (Water Street) – Groton Long Point, Noank | Eastern terminus of Route 215 |
| New London | Mystic River | 109.12 | 175.61 | Mystic River Bascule Bridge | Mystic River Bascule Bridge |
| New London | Stonington | 109.67 | 176.50 | Route 27 north (Denison Avenue) to I-95 – Old Mystic | Southern terminus of Route 27 |
| New London | Stonington | 112.48 | 181.02 | US 1A north (North Water Street) – Stonington Borough | Southern terminus of US 1A |
| New London | Stonington | 113.63 | 182.87 | US 1A south (Elm Street) – Stonington Borough | Northern terminus of US 1A |
| New London | Stonington | 116.78 | 187.94 | Route 234 west (Pequot Trail) to I-95 – Old Mystic | Eastern terminus of Route 234 |
| New London | Stonington | 117.24 | 188.68 | Route 2 west (Liberty Street) to I-95 – Norwich, Hartford | Eastern terminus of Route 2 |
| New London | Stonington | 117.37 | 188.89 | US 1 north – Westerly | Continuation into Rhode Island |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Incomplete access ||||||