The transportation commission may, by rule adopted pursuant to chapter 1-26, and local authorities may by ordinance, with respect to any controlled-access roadway under their respective jurisdictions, prohibit the use of any such roadway by pedestrians, bicycles, or other nonmotorized traffic or by any person operating a motor-driven cycle.
The Department of Transportation or the local authority adopting any such prohibitory regulation shall erect and maintain official signs on the controlled-access roadway on which such regulations are applicable. If so erected no person may disobey the restrictions stated on such signs. The violation for failure to obey a regulatory sign under this section is a Class 2 misdemeanor.
SDCL 32-26-11