Route 138 is a numbered State Highway running in Rhode Island. Route 138 begins in Exeter at the Connecticut state line in the west and runs to the Massachusetts state line in Tiverton in the east, and is the only state-numbered route to completely cross Rhode Island. Route 138 also keeps the same route number on the other side of both state lines.Route 138 is a major thoroughfare in southern Rhode Island. The route ultimately connects Interstate 95 and the University of Rhode Island campus with the island town of Jamestown, the city of Newport, as well as the Tiverton-Little Compton coastal region.Route descriptionRoute 138 takes the following route through the State:Exeter: ; Connecticut State line at Route 138 to Hopkinton town lineSpring StreetSpring Street, Nooseneck Hill Road and Main StreetMain Street and Kingstown RoadUsquepaugh Road, Kingstown Road, Moorsefield Road and Tower Hill RoadTower Hill Road and Route 138 ExpresswayRoute 138 Expressway Newport: ; Jamestown town line to Middletown town lineRoute 138 Expressway and Admiral Kalbfus RoadWest Main Road and East Main RoadEast Main Road and Fall River ExpresswayFall River Expressway and Main Road