It shall be unlawful for the driver of any vehicle or for any pedestrian, without authority, to trespass on foot or with any vehicle or any conveyance, upon any street or alley, or any part thereof, which is enclosed or guarded with safeguards or indicated by signs or signals placed or erected for the purpose of guarding or protecting the repairing, constructing, reconstructing, grading, resurfacing or paving of any street or alley, or any part thereof, or for the purpose of guarding or protecting the constructing or reconstructing of any sewers, water, light, gas or other public works thereon. Violators of this Section shall be subject to a fine of fifty dollars ($50.00) per violation. (1975 Code § 8-5-25; amd. Ord. 3-92, 12-15-1992)