(1) The department of transportation and local authorities may, with respect to any controlled-access roadway under their respective jurisdictions, prohibit the use of that roadway by pedestrians, bicycles or other nonmotorized traffic or by any person operating a motor-driven cycle.
(2) The department or the local authority adopting any such prohibitory regulation shall erect and maintain official signs on the controlled-access roadway on which the regulations are applicable, and when the signs are erected, a person who disobeys the restrictions stated on the signs commits a Class C misdemeanor.