No person shall operate a bicycle upon any portion of a pedestrian overpass or underpass, except that bicycles with the operator dismounted may be permitted on such structures for the purpose of crossing the highway and while so doing, shall obey the regulations applicable to pedestrians.
(Sec. 15-17.9, R.O. 1978 (1983 Ed.)) (1990 Code, Ch. 15, Art. 17, § 15-17.8)