Route 166 is a minor
state highway
A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either Route number, numbered or maintained by a sub-national state or province. A road numbered ...
in southern
Connecticut
Connecticut ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Rhode Island to the east, Massachusetts to the north, New York (state), New York to the west, and Long Island Sound to the south. ...
running from
Westbrook to
Old Saybrook
Old Saybrook is a town in Middlesex County, Connecticut, United States. The town is part of the Lower Connecticut River Valley Planning Region. The population was 10,481 at the 2020 census. It contains the incorporated borough of Fenwick, an ...
. The route primarily serves as a connector from I-95 to the
Saybrook Manor
Saybrook Manor is a communitand census-designated place (CDP) in Old Saybrook, a town in Middlesex County, Connecticut, United States. The population was 1,127 at the 2020 census. The Saybrook Manor section is generally the area south of U.S. Ro ...
section of Old Saybrook.
Route description
Route 166 begins at an intersection with
Route 153 in the eastern part of the town of
Westbrook. It heads east, roughly paralleling
I-95
Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from U.S. Route 1 (US 1) in Miami, Florida, north to the Houlton–Woodstock Border Crossing between Maine and the ...
on the north, into the town of
Old Saybrook
Old Saybrook is a town in Middlesex County, Connecticut, United States. The town is part of the Lower Connecticut River Valley Planning Region. The population was 10,481 at the 2020 census. It contains the incorporated borough of Fenwick, an ...
. Along the way, it passes by the Westbrook Block company just before crossing the town line. In Old Saybrook, it turns south, crossing
I-95
Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from U.S. Route 1 (US 1) in Miami, Florida, north to the Houlton–Woodstock Border Crossing between Maine and the ...
along the Rosario Aloisio Memorial Bridge, with an interchange at exit 66. It continues southeast over the
Amtrak Northeast Corridor line to end at an intersection with
US 1
U.S. Route 1 or U.S. Highway 1 (US 1) is a major north–south United States Numbered Highway System, United States Numbered Highway that serves the East Coast of the United States. It runs from Key West, Florida, north to Fort ...
in the western part of Old Saybrook. The entire route is known as Spencer Plain Road and is classified as a minor arterial road carrying average daily volumes of 5,600 vehicles per day.
[
]
History
Route 166 was established from town roads in 1935, and has had no major changes in alignment or designation since.Connecticut Routes, Route 166
/ref>
Junction list
References
External links
{{Portal, Connecticut
166
Year 166 ( CLXVI) was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Pudens and Pollio (or, less frequently, year 919 ''Ab urbe condita''). The denomination 166 for this year ...
Transportation in Middlesex County, Connecticut