Connecticut Route 3
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Route3 is a 14.45-mile-long (23.26km) route connecting Middletown to Glastonbury. It passes through the towns of Cromwell, Rocky Hill, and Wethersfield. The northernmost 3 miles (4.8km) of Route3 is a freeway that was originally intended for the cancelled Interstate491.
Route description

Route3 begins at Route66 in Middletown, and is a surface road for its first 11 miles (18km) up to Wethersfield. After crossing into Cromwell, it intersects Route372, which offers access to Route9 just east of the intersection. After overpassing Route 9, it continues north into Rocky Hill and overpasses Interstate91 without an interchange. After a brief concurrency with Route 160, it crosses into Wethersfield, where it meets the eastern end of Route 287 and crosses over Route 99. After the Silas Deane Highway (Route 99) intersection, it becomes a four-lane undivided expressway. At an interchange with Interstate91, it becomes a four-lane divided freeway crosses the Connecticut River on the William H. Putnam Memorial Bridge into Glastonbury. The freeway has one exit for Main Street (via Glastonbury Boulevard northbound and Putnam Boulevard southbound) before ending at a trumpet interchange with the Route2 expressway at the East Hartford town line.
History
1941
Route3 was established in 1941. It originally ran from West Street/Berlin Road in Cromwell, which was part of Route72 at the time (now Route372), to the Silas Deane Highway (Route99) in Wethersfield.
1958–1973 (I-491)
In late 1958, as part of the planned Interstate491 (a southeastern bypass of Hartford), a freeway from I-91 to Main Street in Glastonbury, crossing the Connecticut River on the Putnam Memorial Bridge, was opened. The Route3 designation was temporarily extended along this freeway pending completion of I-491. In 1973, I-491 was cancelled due to local opposition and the Route3 designation along this freeway segment became permanent. In the late 1980s, the freeway was extended so that it terminated at Route 2, rather than at Main Street.
1991
In 1991, when the Route9 freeway through Berlin and New Britain was completed, Route72 was truncated to end at Route9 in New Britain. The east–west portion of the old alignment of Route72 was reassigned to an extended Route372 (running along Berlin Road/West Street to end at Route99 in Cromwell). The north–south portion of old Route72 from Cromwell to Middletown (ending at Route66) was reassigned to Route3.
Junction list
Exits were given mile-based numbers in 2025 as part of a sign replacement project.
| County | Location | mi | km | Exit | Destinations | Notes |
|---|---|---|---|---|---|---|
| Middlesex | Middletown | 0.00 | 0.00 | Route66– Middletown, Portland, Meriden | Southern terminus | |
| Cromwell | 3.05 | 4.91 | To Route372 west– Berlin, New Britain | Access via SR 524 | ||
| 3.37 | 5.42 | Route372 to I-91/ Route9– Middletown, Cromwell, Hartford, Berlin, New Britain | ||||
| Hartford | Rocky Hill | 6.59 | 10.61 | To I-91– Hartford, New Haven, Dinosaur State Park | Access via SSR 411 | |
| 7.21 | 11.60 | Route160 east– Rocky Hill | Southern end of Route 160 concurrency | |||
| 7.40 | 11.91 | Route160 west– Berlin | Northern end of Route 160 concurrency | |||
| Wethersfield | 10.21 | 16.43 | Route287 west– Newington | Eastern terminus of Route 287 | ||
| 10.37 | 16.69 | Route99– Hartford, Rocky Hill | Former Route 9 | |||
| 10.55 | 16.98 | Southern end of limited-access section | ||||
| 11.31 | 18.20 | 11 | I-91– Hartford, New Haven | Signed as exits 11A (I-91 south) and 11B (I-91 north) southbound; exits 33A and 33B on I-91 | ||
| Connecticut River | 11.63– 12.09 | 18.72– 19.46 | Putnam Bridge | |||
| Glastonbury | 12.96 | 20.86 | 13A | To Main Street– Glastonbury | Northbound exit and entrance; access via Glastonbury Boulevard | |
| 13.26 | 21.34 | 13 | Southbound exit and entrance; access via Putnam Boulevard | |||
| 14.45 | 23.26 | Route2– Hartford, Norwich | Eastern terminus; signed as exits 13B (Route 2 west) and 13C (Route 2 east); exit 4A on Route 2 | |||
| 1.000mi = 1.609km; 1.000km = 0.621mi Concurrency terminusIncomplete access |