Ansonia is a city in New Haven County, Connecticut, United States. Located on the Naugatuck River, it is immediately north of Derby, and about 12 miles (19 km) northwest of New Haven. The city is part of the Naugatuck Valley Planning Region. The population was 18,918 at the time of the 2020 census. The ZIP code for Ansonia is 06401. The city is served by the Metro-North Railroad. Ansonia Station is a stop on the railroad passenger commuter service's Waterbury Branch connecting to New York's Grand Central Terminal. Ansonia also is served by the Connecticut Transit bus carrier. Connecticut Route 8 serves Ansonia.
Derby is a city in New Haven County, Connecticut, United States, approximately 8 miles (13 km) west-northwest of New Haven. It is located in southwest Connecticut at the confluence of the Housatonic and Naugatuck rivers. It shares borders with the cities of Ansonia to the north and Shelton to the southwest, and the towns of Orange to the south, Seymour to the northwest, and Woodbridge to the east. The city is part of the Naugatuck Valley Planning Region. The population was 12,325 at the 2020 census. It is the smallest city in Connecticut by area, at 5.3 square miles (14 km2).
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.
The Naugatuck River Valley is the watershed area of the Naugatuck River in the western part of Connecticut. The Naugatuck Valley straddles parts of Litchfield County, New Haven, and Fairfield counties. The Route 8 corridor and Waterbury Branch of the Metro-North railroad line run along the river valley. Geographically, it comprises the municipalities located within the Naugatuck River basin. During the 19th and 20th centuries, the area was one of the main manufacturing centers in New England, and most of the communities around the river were emblematic New England mill towns.
Route 8 is a 67.36-mile (108.41 km) state highway in Connecticut that runs north–south from Bridgeport, through Waterbury, all the way to the Massachusetts state line where it continues as Massachusetts Route 8. Most of the highway is a four-lane freeway but the northernmost 8.8 miles (14.2 km) is a two-lane surface road.
Route 63 is a secondary state highway in the U.S. state of Connecticut, from New Haven up to Canaan, running for 52.57 miles (84.60 km). It connects the Greater New Haven area to Northwestern Connecticut via the western suburbs of Waterbury.
Route 67 is a secondary state highway in the U.S. state of Connecticut, from the town of New Milford in the Greater Danbury area to the town of Woodbridge in the outskirts of New Haven. The route runs for 31.00 miles (49.89 km). It generally follows a northwest-southeast path, and is signed north-south.
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.
Route 68 is an east–west state highway in the U.S. state of Connecticut connecting the towns of Durham and Naugatuck.
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.
Route 142 is a state highway in Connecticut that serves as an alternate route of US 1, passing through the village of Short Beach on the Branford shoreline. It starts at US 1 in East Haven and ends at US 1 in Branford, running for 4.27 miles (6.87 km).
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 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 42 is an east–west state highway in Connecticut running for 13.66 miles (21.98 km) from Route 67 in Oxford to Route 10 in Cheshire.
Route 103 is a state highway in Connecticut running from the Quinnipiac Meadows neighborhood in New Haven, through the Montowese area of North Haven, ending at the town center of North Haven.
Route 110 is a state highway in Connecticut running for 15.95 miles (25.67 km) from Interstate 95 (I-95) in Stratford to Route 111 in Monroe.
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 222 is a state highway in west central Connecticut, running in a meandering pattern from Thomaston to Harwinton.
Route 313 is a Connecticut state highway in the outer northwestern New Haven suburbs, running from Seymour to Woodbridge.
Route 334 is a Connecticut state highway in the Naugatuck River valley, running from Seymour to Ansonia.
Route 34 in Derby 
Route 67 in Seymour 
