Route 4 (also known as the Colonel Rodman Highway) is a numbered state highway located in Washington County and southern Kent County, Rhode Island, United States. The route is a major north–south freeway in the southern Providence metropolitan area, directly linking Providence with eastern Washington County. Route 4 is used for access to the beaches of Narragansett and South Kingstown, and also serves as a major connection between Providence and Newport. The 9.8-mile (15.8 km) route begins as a two-lane divided highway at an intersection with U.S. Route 1 in the town of North Kingstown, becoming a limited-access freeway shortly after an intersection with Oak Hill Road. Route 4 has four numbered interchanges before terminating in Warwick, where the northbound lanes merge into Interstate 95. All but the southernmost 1.2 miles (1.9 km) of Route 4 is a freeway. The southern portion of the route has three at-grade intersections with three northbound and two southbound traffic signals.