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.
U.S. Route 202 (US 202) is a spur route of US 2. It follows a northeasterly and southwesterly direction stretching from Delaware in the south to Maine in the north and traveling through the states of Pennsylvania, New Jersey, New York, Connecticut, Massachusetts, and New Hampshire. The highway has borne the number 202 since at least 1936. Before this, sections of the highway were designated U.S. Route 122, as it intersected US 22 in New Jersey. It intersects its parent route, US 2, in Bangor, Maine.
Route 15 is a state highway in the U.S. state of Connecticut that runs 83.53 miles (134.43 km) from a connection with New York's Hutchinson River Parkway in Greenwich, Connecticut, to its northern terminus intersecting with Interstate 84 (I-84) in East Hartford, Connecticut. Route 15 consists of four distinct sections: the Merritt Parkway, the Wilbur Cross Parkway, most of the Berlin Turnpike, and part of the Wilbur Cross Highway. The unified designation was applied to these separate highways in 1948 to provide a continuous through route from New York to Massachusetts. The parkway section of Route 15 is often referred to locally as "The Merritt".
Route 40, also known as the Mount Carmel Connector, is a 3.08-mile (4.96 km) freeway connecting Interstate 91 and Bailey Road in North Haven, Connecticut to Route 10 in the Mount Carmel neighborhood of Hamden. Route 40 is a four-lane freeway with one intermediate exit leading to/from U.S. Route 5 in North Haven. It crosses over Route 15 but does not have an interchange with it. This is the only place in the state where two freeways cross without an interchange.
Route 17 is a primary north–south state route beginning in New Haven, through Middletown, and ending in Glastonbury, with a length of 36.33 miles (58.47 km).
Route 22 is a 14.07-mile-long (22.64 km) secondary state route within the U.S. state of Connecticut. Route 22 is an L-shaped road that is signed east–west from Hamden to the western junction of Route 80 in North Branford, and north–south to its eastern terminus in Guilford. It was designated in 1951 as a bypass of New Haven, connecting the Wilbur Cross Parkway and Route 80.
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 69 is a primary north–south state highway in the U.S. state of Connecticut connecting the city of New Haven to the city of Bristol in the western part of Greater Hartford, passing through Greater Waterbury along the way. The route extends north of Bristol as a secondary route into the town of Burlington. Route 69 is 35.16 miles (56.58 km) in total length.
Route 122 is a primary, minor arterial highway in the United States. It begins at Interstate 95 in West Haven, Connecticut. It runs north of West Haven center and roughly follows the path of the West River. It then enters the Westville neighborhood of New Haven and ends at Route 63. Route 122 is 3.51 miles (5.65 km) long.
The Berlin Turnpike is a 12.17-mile (19.59 km) major thoroughfare carrying U.S. Route 5 and Route 15 in New Haven County and Hartford County in the U.S. state of Connecticut. The road begins one mile south of the Meriden-Berlin town line where Route 15 on the Wilbur Cross Parkway merges with US 5 along North Broad Street in Meriden and terminates at the Hartford city line. The local name of the street varies as it passes through multiple towns.
Route 152 is a state highway in Connecticut running entirely within the town of Orange. It serves to connect the town center with U.S. Route 1 and Route 34.
Route 243 is a state highway in Connecticut running for 6.70 miles (10.78 km) from Route 115 at the Ansonia-Derby town line to Route 63 in New Haven. It serves the Westville neighborhood of New Haven and the southern portions of the towns of Woodbridge and Ansonia. The road continues across the Naugatuck River as State Road 853 leading to Route 8.
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 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.
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 108 in the U.S. state of Connecticut, locally called Nichols Avenue and Huntington Turnpike, is a two-lane state highway that runs northerly from US 1, Boston Post Road in Stratford, through Trumbull, to Route 110 in downtown Shelton. Originally called the Farm Highway, it was laid out to the south side of Mischa Hill in Trumbull on December 7, 1696 and is considered to be the third oldest documented highway in Connecticut after the Mohegan Road in Norwich (1670) and the Boston Post Road or US 1 (1673).
Route 104 is a Connecticut state highway in the city of Stamford, starting from the Bulls Head section of the city then through North Stamford, with the highway ending at New York state line.
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.
U.S. Route 7 (US 7) is a north–south United States Numbered Highway which runs 78 miles (126 km) in the state of Connecticut. The route begins at Interstate 95 (I-95) in Norwalk starting out as a four-lane freeway until the Wilton town line. The route then proceeds north as a two-lane surface road through Redding and Ridgefield, where it becomes a four-lane surface road until it reaches Danbury. The route becomes a four-lane freeway again, eventually merging with I-84 for a brief period before it turns and proceeds north with US 202 in Brookfield. The freeway section terminates at an intersection with US 202 at the Fairfield–Litchfield county line next to Candlewood lake. The route then continues north as a four-lane arterial road to New Milford, where it becomes a two-lane surface road, running north to the Massachusetts border in North Canaan. US 7 was aligned to its current route around 1930, and, since then, three sections totaling around 12 miles (19 km) have been upgraded to freeway standards.
U.S. Route 44 (US 44) is an east–west United States Numbered Highway that runs for 237 miles (381 km) through four states in the Northeastern United States. The western terminus is at US 209 and New York State Route 55 (NY 55) in Kerhonkson, New York, a hamlet in the Hudson Valley region. The eastern terminus is at Route 3A in Plymouth, Massachusetts.
US 1 in Milford 
Route 15 / Wilbur Cross Parkway in Orange 
Route 34 in Orange
