S.C. Code Ann. § 58-17-3380: Warning boards shall be maintained near drawbridges and grade crossings.

Every company, lessee, manager or receiver owning or operating a railroad in this State shall provide, maintain and place warning boards near drawbridges and places where railroads cross at grade. Such boards shall have letters of sufficient size to be clearly seen from the engine and to describe the place of danger and shall be placed not more than eight feet from the side of the track.