The Connecticut Turnpike is a freeway and former toll road in the U.S. state of Connecticut; it is maintained by the Connecticut Department of Transportation (ConnDOT). Spanning approximately 128 miles (206 km) along a generally west–east axis, its roadbed is shared with Interstate 95 (I-95) for 88 miles (142 km) from the New York state border in Greenwich to East Lyme; I-395 for 36 miles (58 km) from East Lyme to Plainfield; and SR 695 for four miles (6.4 km) from Plainfield to the Rhode Island state line at U.S. Route 6 (US 6) in Killingly. The turnpike briefly runs concurrently with US 1 from Old Saybrook to Old Lyme and Route 2A from Montville to Norwich.

Plainfield is a town in Windham County, Connecticut, United States. The town is part of the Northeastern Connecticut Planning Region. The population was 14,973 at the 2020 census. The town comprises four villages: Plainfield, Moosup, Wauregan, and Central Village. Each village has their own respective United States Post Office and fire department. The entire town is serviced by the 860 area code.