The proposed southern extension of Route 10 was ultimately canceled by RIDPW. In 1966, Route 37 was included in a proposal to extend I-295 across Narragansett Bay to make a full beltway around the city of Providence. The plan, which was approved by both RIDPW and the Massachusetts Highway Department (MassHighway), involved extending Route 37 eastward from its existing terminus at US 1 across Narragansett bay via a new bridge that would connect Warwick with the town of Barrington. The expressway would then head northward into the town of Warren, intersecting I-195 in the town of Swansea after crossing into Massachusetts. Eventually, the freeway would connect with I-295 at its existing northern terminus in Attleboro, Massachusetts. In 1969, the Federal Highway Administration (FHWA) designated the proposed expressway as I-895 instead of the originally proposed I-295. The expressway was planned to extend the existing Route 37 by , and was scheduled to be completed by 1975. In 1971, however, the expressway's original routing was canceled due to community opposition in the towns of Barrington and Warren and concerns that a new bridge across Upper Narragansett Bay would interfere with aviation traffic at T. F. Green Airport. In 1971, RIDOT submitted a new proposed alignment for I-895 that utilized the Jamestown and Newport Bridges in southern Newport County and bypassed Barrington and Warwick altogether, but the interstate was ultimately canceled in 1982. In 1981, ten years after the eastern extension of Route 37 was canceled, RIDOT began planning studies for a western extension of the freeway. The expressway was included in a proposal to extend I-84 eastward from Hartford, Connecticut to Providence; more northern alignments for the freeway had been rejected due to concerns of potential damage to the Scituate Reservoir. The southern routing of I-84, which would have utilized Route 37 and terminated in Warwick, largely bypassed the reservoir's watershed. In 1982, however, I-84 was officially canceled by RIDOT after studies indicated that the southern alignment was not a feasible alternative. In June 2006, erosion resulting from heavy rains exposed human remains near the westbound lanes of Route 37 in Cranston. Subsequent drainage improvements to the freeway led to the discovery of human remains from more than 70 individuals buried in late 19th and early 20th centuries. Archaeological research indicated that the portion of Route 37 in Cranston between Exits 2 and 3 was inadvertently constructed over a portion of the State Farm Cemetery in the 1960s.