Sakonnet River Bridge is a four-lane bridge spanning the Sakonnet River in eastern Rhode Island. The bridge carries RI 24 and RI 138 between the communities of Portsmouth and Tiverton, Rhode Island. The current bridge is a box girder bridge that opened in 2012 at a cost of $120 million (USD). The previous bridge was a truss bridge that was built in 1956 and demolished in 2012 due to structural deficiencies. The truss bridge had previously served as a replacement for the Stone Bridge, about 0.8 miles (1.3 km) to the south.

Route 138 is a numbered State Highway running 48.3 miles (77.7 km) in Rhode Island. It is the longest state numbered route in Rhode Island, and the second longest highway after US 1. 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.