Rhode Island

Route description

US 1 has a business/bypass split in Warwick where US 1 Business runs along Post Road and US 1 Bypass runs along Post Road Bypass. The business route is officially recognized by the Rhode Island Department of Transportation as US 1.
Note: This section uses [] () to indicate a one-way pair. Streets appearing in [] are the northbound or eastbound side. Streets appearing in () are the southbound or westbound side. The reading order inside the brackets and parentheses is the same as outside.

US 1 takes the following route through the state (south to north):
Westerly: 6.4 miles (10.3 km); Connecticut State line to Charlestown town line
Broad Street, [Main Street, Union Street] (Broad Street), Broad Street, Granite Street, Franklin Street, Post Road and Shore Road
Charlestown: 7.1 miles (11.4 km); Westerly city line to South Kingstown town line
Post Road
South Kingstown: 7.7 miles (12.4 km); Charlestown town line to Narragansett town line
Commander Perry Memorial Highway
Narragansett: 0.8 miles (1.3 km); South Kingstown town line to South Kingstown town line
Commander Perry Memorial Highway
South Kingstown: 4.6 miles (7.4 km); Narragansett town line to North Kingstown town line
Commander Perry Memorial Highway and Tower Hill Road
US 1/RI 138 concurrency
North Kingstown: 9.8 miles (15.8 km); South Kingstown line to East Greenwich town line
Tower Hill Road and Post Road
East Greenwich: 2.4 miles (3.9 km); North Kingstown town line to Warwick city line
Post Road and Main Street
Warwick: 7.5 miles (12.1 km); East Greenwich town line to Cranston city line
Post Road, [Post Road, West Shore Road] (Greenwich Avenue, Veterans Memorial Drive), Post Road and Elmwood Avenue
Cranston: 1.1 miles (1.8 km); Warwick city line to Providence city line
Elmwood Avenue
Providence: 6.3 miles (10.1 km); Cranston city line to Pawtucket city line
Elmwood Avenue, Broad Street, [Broad Street, Franklin Street, Service Road #8] (Service Road #7, Broadway), Broadway, [Fountain Street] (Sabin Street), Francis Street, Gaspee Street, Smith Street and North Main Street
Pawtucket: 3.1 miles (5.0 km); Providence city line to Massachusetts State line
Pawtucket Avenue, George Street, [East Avenue] (Park Place West, Dexter Street, Goff Avenue, Summer Street, High Street), Main Street, [Main Street, Walcott Street, north–south Expressway] (Walcott Street, Broadway) and Broadway