Route 34 is a primary state highway in the U.S. state of Connecticut. Route 34 is 21.88 miles (35.21 km) long, and extends from Newtown near I-84 to Route 10 in New Haven. The highways connects the New Haven and Danbury areas via the Lower Naugatuck River Valley. The portion of the route between New Haven and Derby was an early toll road known as the Derby Turnpike. It formerly ran through downtown New Haven on the Oak Street Connector until the early 2020s.
Route 25 is a 28.59-mile (46.01 km), primary state highway connecting the city of Bridgeport and the town of Brookfield in the U.S. state of Connecticut. Route 25 is a six-lane freeway from Bridgeport to northern Trumbull and a two-lane surface road the rest of the way to Brookfield.
Route 79 is a 14.34-mile (23.08 km) state highway in southern Connecticut from Madison to Durham.
Route 83 is a 35.65-mile-long (57.37 km) north–south state highway in the Greater Hartford and Greater Springfield areas of the U.S. states of Connecticut and Massachusetts. It serves as the main north–south artery for the towns of Manchester, Vernon, Ellington, and Somers, and continues through East Longmeadow center into downtown Springfield. The route in Massachusetts is town-maintained, except for the ramps connecting to U.S. Route 5 parallel to Interstate 91.
Connecticut Route 14 is one of several secondary routes from eastern Connecticut into Rhode Island. It runs from the Willimantic section of the town of Windham to the Rhode Island state line in Sterling.
Connecticut Route 10 is a state highway that runs between New Haven and the state line near Granby. It continues north of the state line as Massachusetts Route 10, which in turn continues directly to New Hampshire Route 10.
Route 121 is a state highway in southern Connecticut running from U.S. Route 1 in Milford to Route 34 near the Orange-Derby line.
Route 37 is a north–south state highway in Connecticut running for 18.66 miles (30.03 km) from I-84, Route 39 and Route 53 in Danbury, through New Fairfield, to U.S. Route 7 in New Milford. The northernmost section between the town centers of Sherman and New Milford was once part of an early toll road known as the New Milford and Sherman Turnpike chartered in 1818.
Route 81 is a state highway in Connecticut from Clinton center through Killingworth center to the village of Higganum in the town of Haddam.
Route 87 is a Connecticut state highway running from Franklin to Andover, generally in a southeast–northwest direction. The route is part of the road connecting the towns of Norwich, Lebanon, Columbia, and Andover. Route 87 is a two-lane rural collector road for its entire length.
Route 151 is a Connecticut state highway in the Connecticut River valley running from East Haddam via Moodus to the village of Cobalt in East Hampton.
Route 120 is a state highway in Connecticut, running entirely in the town of Southington. It serves as a more direct connection between the town center of Southington and the city of Meriden.
Route 111 is a state highway in southwestern Connecticut, United States, running from the Merritt Parkway (Route 15) in Trumbull to Route 34 in Monroe. The junction with the Merritt Parkway is currently the only single-point urban interchange (SPUI) in the entire state.
Route 114 is a Connecticut state highway in the western suburbs of New Haven, running from Orange to Woodbridge. Other than at its junction with Route 63, it is signed north and south.
Route 135 is a Connecticut state highway running entirely in the town of Fairfield. It connects Interstate 95 (I-95) and U.S. Route 1 in downtown Fairfield to Route 58 in the northern part of town.
Route 136 is a state highway in southwestern Connecticut, running from Darien to Easton. The route was initially established in 1932 to serve the beach communities between Darien and Southport. Its eastern end was relocated in 1963 to head northeast from Westport to Easton instead.
Route 153 is a Connecticut state highway in the Connecticut River valley running from U.S. Route 1 in Westbrook center to Route 154 in Essex Village in the town of Essex.
Route 177 is a state highway in central Connecticut, running from Plainville to Canton.
Route 220 is a 7.95-mile-long (12.79 km) state route in northern Connecticut and western Massachusetts, serving the southeastern suburbs of Springfield. The route runs in an "L" pattern and connects the town of Enfield, Connecticut, to the town of East Longmeadow. The route serves the Thompsonville and North Thompsonville sections of Enfield, connecting them to East Longmeadow center. In Connecticut, Route 220 is signed east-west. In Massachusetts, Route 220 is a town-maintained road and it is signed north-south.
Route 302 is a state highway in western Connecticut running from Bethel to Newtown.
US 1 in Orange 
Route 34 in Orange
