Connecticut Route 66

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Route 66 marker

Route 66
Route information
Maintained by ConnDOT
Length: 38.38 mi[1] (61.77 km)
Existed: 1968 – present
Major junctions
West end: I‑691 in Meriden
  I‑91 in Meriden
Route 2 in Marlborough
East end: US 6 in Windham
Highway system
Route 64 Route 67

Route 66 is a Connecticut state highway running from Meriden to Windham, serving as an alternate east–west route to US 6 through east-central Connecticut.

Route description[edit]

Route 66 begins in Meriden as the extension of I-691, which officially ends at its interchange with I-91. This freeway portion runs for about 1.5 miles (2.4 km) into the town of Middlefield. Route 66 then becomes a surface road and running 4 lanes wide in Middlefield, Middletown across but not intersecting the Route 9 freeway, and Portland, overlapping Route 17 from Middletown to Portland across the Connecticut River on the Arrigoni Bridge. It then narrows to 2 lanes in Portland as Route 17 turns off, and continues through East Hampton and Marlborough, where it intersects with the Route 2 freeway, and continues through Hebron, and Columbia. In Columbia, Route 66 intersects with US 6 at a freeway junction, after which it continues into Windham. In Columbia and Windham, Route 66 serves as an alternate non-freeway route through the Windham town center, where it briefly overlaps with Route 32, and Eastern Connecticut State University. Route 66 ends in Windham where at the end of the freeway segment of US 6, from which US 6 continues to the northeast.[1]

Special Designations[edit]

From US 6 in Columbia to the end in Windham, Route 66 is designated the Grand Army of the Republic Highway.[1]


The entire length of modern Route 66 was originally improved in the 19th century as various private turnpikes. The road from Meriden to Middletown was the Middletown and Meriden Turnpike chartered in 1809 and used the former surface alignment of Route 66 in Meriden (East Main Street). Between Middletown and East Hampton, modern Route 66 was the western half of the Colchester and Chatham Turnpike (the eastern half is modern Route 16), which was chartered in 1808. From East Hampton via Marlborough to the Hebron-Columbia line, the road was the Hebron and Middle Haddam Turnpike that was chartered in 1802. From the Hebron-Columbia line through Columbia to Willimantic, the road was the Columbia Turnpike, chartered in 1808.

Route 66 was originally part of State Highway 111 designated in 1922. It ran from the Milldale section of Southington, via Meriden and Middletown, to Willimantic. In the 1932 state highway renumbering, old Highway 111 was designated as part of Route 14, which extended from Woodbury to the Rhode Island state line. In 1941, the section of Route 14 from Woodbury to Willimantic was redesignated as US 6A, connecting at US 6 on both ends.

In the early 1960s, plans for constructing a US 6A expressway between I-84 in Southington and Willimantic were announced. By 1966, a short portion of the expressway from US 5 in Meriden to Middlefield (where the current expressway ends) opened to traffic. By 1968, the US 6A designation was removed and split into several routes. The section from I-84 in Southington to US 6 in Columbia was reumbered as Route 66, including the newly opened freeway segment. In 1971, another section of the Route 66 freeway opened from between Route 322 and US 5. In 1987, with the completion of the freeway connection to I-84, the section of Route 66 west of I-91 was redesignated as I-691, truncating the western end of Route 66. In 1983, US 6 was rerouted to a newly constructed bypass around Willimantic, and the former surface route section of US 6 from Columbia to Windham was transferred to Route 66.[2]

Junction list[edit]

County Location Mile[1] km Destinations Notes
Middlesex Middlefield 0.00 0.00 I‑691 west – Meriden
1.96 3.15 Route 147 south – Durham
3.88 6.24 Route 217 north – Westfield
Middletown 5.43 8.74 Route 157 south – Rockfall
6.12 9.85 Route 3 north – Cromwell
6.70 10.78 Route 9 / Route 17 south – Higganum, Durham Southern end of CT 9/17 overlap
6.24 10.04 Route 9 north – Cromwell, New Britain Northern end of CT 9 overlap
Connecticut River Arrigoni Bridge
Portland 7.96 12.81 Route 17A north – Portland
9.96 16.03 Route 17 north – Glastonbury Northern end of CT 17 overlap
East Hampton 12.99 20.91 Route 151 south – Moodus
13.83 22.26 Route 16 east – Westchester
16.47 26.51 Route 196 south – Moodus
Hartford Marlborough 20.62 33.18 Route 2 – Glastonbury, Colchester CT 2 Exit 13
Tolland Hebron 25.91 41.70 Route 85 – Amston, Bolton
26.07 41.96 Route 316 north – Andover
Columbia 30.57 49.20 Route 87 – Andover, Chestnut Hill
32.33 52.03 US 6 – Andover, Windham
Windham Windham 33.07 53.22 Route 32 north – Mansfield Northern end of CT 32 overlap
34.95 56.25 Route 289 south – Lebanon
35.69 57.44 Route 32 south – Franklin Southern end of CT 32 overlap
36.91 59.40 Route 195 north – Storrs
37.42 60.22 Route 14 east – Windham
38.38 61.77 US 6 – Willimantic, North Windham
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


External links[edit]

Route map: Google / Bing