During nonworking hours all project sites are to be left in a manner that allows the public to safely use all right-of-way. Equipment and materials are not allowed in the right-of-way during nonworking hours unless they are placed in a safe location or protected by permanent guardrails, lighted barricades, or temporary concrete barriers. The use of temporary concrete barriers in the right-of-way is permitted only if the City Engineer approves the installation and location. During work hours, only materials or equipment necessary for construction are allowed in the right-of-way or roadway. [Ord. 501 § 3, 2009.]