Primary highways, secondary arterials and arterial highways shall be as described in the "City of Vancouver Arterial Street System and Classification Map" as amended and adopted each year pursuant to RCW 35.77.010. A copy of such map, as amended, shall be kept on file in the department of public works. (Ord. M-3276 §5, 1996; Ord. M-2755 §3, 1988)