No person shall park any bicycle against windows or parking meters or on the main traveled portion of a sidewalk, nor in such manner as to constitute a hazard to pedestrians, traffic or property; however, if there are no bicycle racks or other facilities intended to be used for parking of bicycles in the vicinity, bicycles may be parked on the sidewalk in an upright position parallel to and within twenty-four inches of the curb. (Ord. 475 NCS § 15.12; prior code §6.33.)