An ordinance relating to traffic safety; applying traffic safety best practices such as a Vision Zero Plan, guiding principles or successor policies in exercising traffic administration authority; establishing study, reporting, and prioritization standards; and aligning rulemaking and project delivery with proven safety countermeasures; renumbering Sections 11.14.714 and 11.14.715 of the Seattle Municipal Code as Sections 11.14.720 and 11.14.725; adding a new Section 11.14.716 to the Seattle Municipal Code; and amending Sections 11.16.120, 11.16.180, 11.16.200, 11.16.220, 11.16.340, and 15.70.040 of the Seattle Municipal Code.