 By 1952, US 1 was rerouted again in Columbia, switching to Gervais Street, Millwood Avenue, and Two Notch.Also by 1952, US 1/US 78 were given new alignment bypassing Clearwater, Bath, Langley, and Gloverville; the old alignment became SC 421.By 1957, US 1/US 78 was rerouted from Fifth Street Bridge to its current alignment over the Savannah River.