page_title: Connecticut Route 80
section_title: History
hierarchical_section_title: Connecticut Route 80 / History
caption_attribution_description: English: CT 80 shortly after it's eastern end at CT 154 in Deep River, Connecticut
context_page_description: Connecticut Route 80 is a 25.9 mile highway that runs through south-central Connecticut. The west end is at CT 17 in Quinnipiac Meadows neighborhood of New Haven, and the east end is at CT 154 in Deep River. Route 80 runs within 5 miles of many town squares- including Downtown New Haven.
context_section_description: In 1818, a toll road was chartered running from the Boston Post Road at the Guilford-Madison town line northeast through Killingworth center, then east to Deep River, ending at the Middlesex Turnpike. The turnpike, known as the Pettipauge and Guilford Turnpike, used Green Hill Road in Madison then modern Route 80 to Deep River. In 1824, another turnpike was built, beginning in the Fair Haven section of New Haven, heading eastward along modern Route 80, and ending at the Pettipauge and Guilford Turnpike in Killingworth center. This was known as the Fairhaven Turnpike.
  In 1922, when Connecticut first publicly signed its state highways with route numbers, several new numbered routes where created from these two turnpikes. From Fair Haven to North Branford center, State Highway 135 was created. Old Highway 135 continued south from North Branford center along modern Route 139 to the Boston Post Road. The eastward continuation of the old Fairhaven Turnpike between North Branford center and the village of North Guilford was designated as State Highway 140. The portion of the old Pettipaue and Guilford Turnpike between Killingworth center and Deep River center became State Highway 175. 
  Modern Route 80 was established as part of the 1932 state highway renumbering from old highways 175, 140, and the east–west portion of 135. In 1940, its east end was relocated to US 1 in Old Saybrook along Warsaw Street, Main Street, Middlesex Turnpike, and Essex Road. In the 1950s, it was extended west to Route 10 in New Haven along Middletown Avenue, State Street, Edwards Street, Munson Street, and Henry Street to Route 10 (Sherman Avenue). In 1962, the western end was truncated to its current location at Route 17. In 1966, with the opening of Route 9, the eastern end of Route 80 was truncated and rerouted to its current location.
caption: CT 80 shortly after its eastern end in Deep River.
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