S.C. Code Ann. § 57-5-120: Abandonment of section of relocated highway.

The department may abandon as a part of the state highway system any section of highway which may be relocated, and every such section so abandoned as a part of the state highway system shall revert to the jurisdiction of the respective appropriate local authorities involved or be abandoned as a public way. But the department, in its discretion, may retain in the system any such relocated section when it serves as a needed connection to the new section or when it serves as a proper part of the state highway system.