(a) The council may, by ordinance, with respect to freeways or designated portions thereof under their jurisdiction to which all rights of access have been acquired, prohibit or restrict the use of such freeways or any portion thereof by pedestrians, bicycles, or other nonmotorized traffic or by any person operating a motor-driven cycle.
(b) Such prohibitory regulations shall be effective when appropriate signs giving notice thereof are erected upon any such freeway and the approaches thereto.
(Sec. 15-17.5, R.O. 1978 (1983 Ed.)) (1990 Code, Ch. 15, Art. 17, § 15-17.5)