S.C. Code § 57-5-1050
The Department may provide for the elimination of intersections at grades with existing State or county roads and city or town streets or other public ways, if the public interest shall be served thereby, or may provide for the elimination of intersections at grade by closing off intersecting roads or streets at the right of way boundary line of such controlled-access facilities. No city or town street or other public way shall be opened into or connected with such controlled-access facility without the consent of the Department, and the respective city, town, county or other political subdivision authorities may close local roads and streets in connection with the establishment of controlled-access facilities and make all necessary agreements with the Department to fully perform and fulfill the purposes of this article.
S.C. Code § 57-5-1050