 After exit 6 , 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 <unk> . Heading southbound , exit 7 is split into exit <unk> , which serves the Quonset Freeway , and exit <unk> , 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 <unk> to the west and entering a suburban region of East Greenwich . The highway crosses under an overpass at Middle Road before <unk> with Route <unk> , the freeway 's final spur , at another partial cloverleaf interchange . Exit 8 is also used to access Route 2 and I @-@ 95 south , which has no direct freeway connection with Route 4 north . Shortly after exit 8 , the Route 4 designation ends and the mainline of the highway <unk> onto I @-@ 95 north . 
