A. The director may, and local authorities by ordinance may, prohibit the use of any part of a controlled access highway under their respective jurisdictions by pedestrians, bicycles or other nonmotorized traffic or by any person operating a motor driven cycle.
B. The director or the local authority adopting the prohibition prescribed in subsection A shall erect and maintain official signs on the applicable controlled access highway. When the signs are erected, a person shall not disobey the restrictions stated on the signs.