In addition to the requirements set forth in this chapter, the department shall adopt such orders, regulations, or rules as it deems necessary in order to preserve and maintain the public health, safety, welfare, and convenience. All work in the public right-of-way pursuant to this chapter shall be performed in accordance with the standard plans and specifications of the department, the design manual, and any department orders, regulations, or rules, except where the director grants prior written approval to deviate from such standard plans and specifications, the design manual, orders, regulations, or rules. (Ord. 3801 § 1, 1997)