State Street, Washington Avenue, South Colony Road, North Colony Road, Broad Street, Berlin Turnpike, Wilbur Cross Highway, Main Street, King Street, Ellington Road, John Fitch Boulevard, South Main Street, Prospect Hill Road, Enfield Street

Southern Terminus:
I-91 in New Haven
Northern Terminus:
Connecticut-Massachusetts state line
54.59 miles
New Haven, Hartford

US 5 is a major north/south route in Connecticut, running parallel to I-91. State Street exists as a local street in New Haven from Water Street (US 1) to I-91. At its interchange with I-91, State Street gains the US 5 designation. It continues north through New Haven and Hamden. US 5 runs north along local streets to Meriden, where it merges with CT 15. The combined US 5/CT 15 is a large divided boulevard called the Berlin Turnpike. South of Hartford, US 5/CT 15 leaves the Berlin Turnpike and runs to the northeast across I-91 as a limited-access highway called the Wilbur Cross Highway. Just before the northern terminus of the Wilbur Cross Highway at I-84 in East Hartford, US 5 splits off. It runs north along local streets to the Connecticut-Massachusetts state line. US 5 continues north through Massachusetts and Vermont to the Canadian border.

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