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 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 9 is a 40.89-mile (65.81 km), four-lane freeway 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 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 58 is a primary state highway in the U.S. state of Connecticut connecting the towns of Fairfield and Bethel. Route 58 is 18.58 miles (29.90 km) long and is one of the primary routes to the downtown Danbury area via Routes 302 and 53.
Route 85 is a north–south state highway in the east-central portion of the U.S. state of Connecticut linking the city of New London to the town of Bolton.
Route 75 in the U.S. states of Connecticut and Massachusetts is a 17.5-mile-long (28.2 km) scenic route connecting the Hartford, Connecticut, and Springfield, Massachusetts, areas. The route begins at Route 159 in the town of Windsor, Connecticut, and ends at the junction of Route 159/Route 147 in the city of Agawam, Massachusetts.
Route 169 is a 47.36-mile-long (76.22 km) state highway in the U.S. states of Connecticut and Massachusetts. It begins in the city of Norwich, Connecticut, and runs 38 miles (61 km) through Northeastern Connecticut, continuing across the state line into Southbridge, Massachusetts. The route ends in Charlton after another nine miles (14 km). A portion of the route in the town center of Pomfret is on the National Register of Historic Places as Pomfret Street Historic District, and 32.10 miles (51.66 km) of the road is designated as the Connecticut State Route 169 National Scenic Byway.
New York State Route 343 (NY 343) is a state highway located entirely within central Dutchess County, in the Hudson Valley region of the U.S. state of New York. It runs east–west from the intersection of NY 82 in the village of Millbrook to the town of Amenia, where it crosses the Connecticut state line and continues eastward as Route 343, a Connecticut state highway located entirely within the town of Sharon. Along the way, it has a 7.3-mile (11.7 km) concurrency with NY 22 from vicinity of the hamlet of Dover Plains to the hamlet of Amenia.
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.
Route 27 is a north–south state highway in southeastern Connecticut running for 3.21 miles (5.17 km) from U.S. Route 1 in Mystic to Route 184 in Old Mystic.
Route 45 is a Connecticut state highway from US 202 in Washington to US 7 in Cornwall, in the rural northwest of the state. It is 10.29 miles (16.56 km) long and runs north–south.
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 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 89 is a state highway in northeastern Connecticut, running from eastern Mansfield to southern Union. It connects the villages of Mansfield Center, Warrenville, and Westford. It is a two-lane rural collector road throughout its entire length, following the path of the Mount Hope River.
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 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 146 is a state road that serves as a scenic alternative to US 1 between Branford and Guilford in the U.S. state of Connecticut. Route 146 is 13.00 miles (20.92 km) long, with 8.36 miles (13.45 km) in Branford and 4.64 miles (7.47 km) in Guilford.
Route 118 is a state highway in northwestern Connecticut, running from the borough of Litchfield via the village of East Litchfield to the town center of Harwinton. Route 118 is a scenic road at both ends. The 2.8-mile (4.5 km) section from the western terminus at the Litchfield green to the village of East Litchfield, and the 0.1-mile (0.16 km) section within the town center of Harwinton have both been designated by the state as scenic roads.
Route 146 in Guilford 
I-95 / Conn. Turnpike in Guilford 
Route 17 in Durham 
