Route 34 is a primary state highway in the U.S. state of Connecticut. Route 34 is 24.37 miles (39.22 km) long, and extends from Washington Avenue near I-84/US 6 in Newtown to the junction of I-95 and I-91 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.
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.
Route 9 is a 40.89-mile-long (65.81 km) expressway beginning in Old Saybrook and ending at I-84 near the Farmington–West Hartford town line. It connects the Eastern Coastline of the state along with the Lower Connecticut River Valley to Hartford and the Capital Region.
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 4 is an east–west primary state highway connecting rural Litchfield County to the Greater Hartford area of the U.S. state of Connecticut. It runs 46.72 miles (75.19 km) from the town of Sharon to the town of West Hartford.
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.
Route 57 is a secondary state highway in western Connecticut serving as the "Main Street" of and connecting the towns of Westport and Weston. The road continues north through Redding to end at US 7 just after crossing into Wilton, in the neighborhood of Georgetown.
Route 37 is a north–south state highway in Connecticut running for 18.66 miles (30.03 km) from Route 39 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 150 is a state highway in southern Connecticut running for 9.04 miles (14.55 km) from the village of Northford, in the town of North Branford, through the center of Wallingford, to the village of Yalesville in Wallingford.
Route 77 is a state highway in southern Connecticut. It is a state-designated scenic road and runs from the Guilford town green, through North Guilford, into the town center of Durham.
Route 154 is a state highway in Connecticut running for 28.24 miles (45.45 km). It serves as one of the main thoroughfares in the town of Old Saybrook, intersecting twice with U.S. Route 1. North of I-95, Route 154 runs parallel to Route 9, along to the west bank of the Connecticut River. The route ends in Middletown at Route 9.
Route 82 is an east–west state highway in Connecticut running for 28.47 miles (45.82 km) from Route 9 in Chester to Route 2 and 32 in Norwich.
U.S. Route 5 (US 5), a north–south United States Numbered Highway that is generally paralleled by Interstate 91 (I-91), begins at the city of New Haven in Connecticut and heads north through western Massachusetts and eastern Vermont to the international border with Canada. Within Connecticut, US 5 proceeds north from New Haven and passes through Meriden and Hartford toward Springfield, Massachusetts.
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 149 is a state highway in east-central Connecticut running from Route 82 in East Haddam center to the Colchester-Hebron town line.
Route 148 is a state highway in southern and southeastern Connecticut running from Route 79 in Killingworth to Route 82 in the village of Hadlyme. Route 148 crosses the Connecticut River using the Chester–Hadlyme Ferry.
Route 156 is a Connecticut state highway running from East Haddam to Waterford.
Route 195 is a state highway in northeastern Connecticut, running from the Willimantic section of Windham to the town center of Tolland via the Storrs section of Mansfield. The road is the main thoroughfare to access the main campus of the University of Connecticut.
Route 197 is a 14.17-mile-long (22.80 km) state highway in northeastern Connecticut and southern Massachusetts, running from Union, Connecticut, to Dudley, Massachusetts. The Connecticut section is signed as an east–west route, while the Massachusetts section is signed north–south.
US 1 in Clinton 
I-95 / Conn. Turnpike in Clinton 
Route 9 in Haddam 
Route 154 in Haddam 
