 In 1984, the turnpike was dualized from milepost 90 (exit 89, WV 94, Marmet) to milepost 82.55; this included construction of a new Toll Plaza C near Sharon.In 1985, work continued on a segment south of Mossy from milepost 59.63 (exit 60, Mossy) to milepost 62.27 near Kingston.Also, a segment from the southern terminus of the turnpike at milepost 8.97 (exit 9, US 460) to milepost 10.60 in Mercer County was reconstructed.