The Transportation Commission shall promulgate rules pursuant to chapter 1-26 and consistent with the manual on uniform traffic control devices governing standards for supplemental guide signs on the interstate highway system. The rules shall set forth qualifying facility criteria; application procedures; sign content, size, location, and spacing restrictions; erection requirements; and message priority. For the purposes of §§ 31-28-10.1 to 31-28-10.3, inclusive, a supplemental guide sign is any official sign erected on the right–of–way to provide guidance for the motorist to traffic generators.

Source: SL 1979, ch 200, §§ 1, 2; SL 1987, ch 210, § 14.