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, the beaches of Narragansett and South Kingstown, and the city of Newport. Route 4 begins as a two-lane divided highway at an intersection with U.S. Route 1 (US 1) in the town of North Kingstown, becoming a limited-access freeway after . The route has four numbered interchanges before terminating in the city of Warwick, where the northbound lanes merge into Interstate 95 (I-95).
The origins of Route 4 date back to 1952, when construction began on a short, unnumbered arterial from US 1 to the modern location of exit 3 at Routes 2 and 102 in Wickford. In 1965, the Rhode Island Department of Public Works began work on a freeway from modern exit 5 north to the merge with I-95. The freeway, designated as Route 4, was completed in 1972. At that time, the Route 4 designation was also applied to the Wickford arterial. In 1988, the missing link in Route 4 between exits 3 and 5 was completed and opened. The Rhode Island Department of Transportation had long-term plans to upgrade the southernmost portion of Route 4 to freeway status by constructing overpasses at Oak Hill Road and West Allenton Road and a grade separation with US 1. Although the project was originally scheduled to be completed by 2007, the $55 million project has been postponed indefinitely.
Route description
Route 4 begins at a fork in the alignment of U.S. Route 1 in the community of North Kingstown; the two left lanes of US 1 default onto Route 4 north, with the right-hand lane carrying Tower Hill Road and US 1 north into the village of Wickford. Route 4 heads in a northwestern direction as a four-lane divided highway, crossing West Allenton Road at an at-grade intersection with a traffic signal after approximately . The highway continues on a northwesterly projection, passing to the northeast of Kettle Hole Pond and to the southwest of Secret Lake in a heavily forested region. After Secret Lake, the highway curves to the north, crossing Oak Hill Road at another at-grade intersection.
Shortly after the intersection with Oak Hill Road, Route 4 transitions from a divided arterial highway into a four-lane limited-access freeway. The freeway passes to the west of Belleville Pond and begins to parallel the alignment of Route 102 (Ten Rod Road) near the community of Lafayette. Route 4 passes over Amtrak's Northeast Corridor railroad before entering the business district of Wickford Junction. The freeway interchanges with Routes 2 and 102 at exit 3, a partial cloverleaf interchange. After the interchange, Route 4 bends to the northeast, beginning a parallel alignment with Route 2 that continues to its northern terminus. Route 4 crosses into the town of East Greenwich, passing under South Road before interchanging with Route 2 at exit 5, a partial cloverleaf interchange.
After exit 5, Route 4 passes the Rhode Island Army National Guard base to the east and to the Hunt River to the west. Route 4 northbound interchanges with Route 403 at exit 7; Route 403, or the Quonset Freeway, is a four-lane, limited access freeway and spur route of Route 4 that serves the Quonset Business Park and the village of Davisville. Heading southbound, exit 7 is split into exit 7B, which serves the Quonset Freeway, and exit 7A, which serves Route 402 (Frenchtown Road), another spur route connecting the highway to US 1 and Route 2. After exit 7, Route 4 continues northward as a six-lane expressway, passing farmlands to the west and entering a suburban region of East Greenwich. The highway crosses under an overpass at Middle Road before interchanging with Route 401, the freeway's final spur, at another partial cloverleaf interchange. Exit 9 is also used to access Route 2 and I-95 south, which has no direct freeway connection with Route 4 north. Shortly after exit 9, the Route 4 designation ends and the mainline of the highway defaults onto I-95 north.
History
In 1950, the Rhode Island General Assembly passed a $12 million (equivalent to $ in ) bond issue to fund the construction of a , four-lane divided arterial bypass of U.S. Route 1 in Wickford. Construction on the highway began in 1952 and was completed in 1954, at which time the roadway opened as an unnumbered state highway leading from US 1 to Routes 2 and 102 in Wickford.