It is unlawful for any person or persons to remove, tear down, or in any way interfere with the danger lights, fences or barriers provided for in this chapter, or to drive or ride over or upon any of the streets, alleys, sidewalks or other public grounds so enclosed while the same is being improved, or to in any way damage, injure or molest any part or parts of such work. (Ord. 861 §1, 1998)