The Department of Highways or local authorities may, with respect to
any controlled-access roadway under their respective jurisdictions,
prohibit the use of any such roadway by pedestrians, bicycles or other
non-motorized traffic or by any person operating a motor-driven cycle.
The Department of Highways or local authorities adopting any such
prohibitory regulations shall erect and maintain official signs on the
controlled-access roadway on which such regulations are applicable and
when so erected no person shall disobey the restrictions stated on