S.C. Code Ann. § 57-1-370
(B) Concerning the development, content, and implementation of the Statewide Transportation Improvement Program, the commission must:
(8) when selecting projects to be undertaken from nontransportation management area metropolitan planning organizations' transportation improvement programs, or selecting the nonmetropolitan area projects to be undertaken that are included in the Statewide Transportation Improvement Program, and when consulting with metropolitan planning organizations designated as transportation management areas, the commission shall establish a priority list of projects to the extent permitted by federal laws or regulations, taking into consideration at least the following criteria:
(C)