Except as provided in Sections 17.54.470 and 17.54.500 and in lieu of yards required by other provisions of this title, the following minimum yards are required for each building site:

    A.    All yards adjoining a building wall not exceeding one story in height: five feet;

    B.    All yards adjoining a building wall two stories in height: ten feet;

    C.    In addition to those yards required by the foregoing provisions of this section, yards adjoining a street shall be increased:

    1.    Five feet from a limited access street (less than three hundred (300) vehicular trips per day),

    2.    Ten feet from a minor residential street (three hundred (300)--six hundred (600) vehicular trips per day),

    3.    Twenty (20) feet from a neighborhood collector street (six hundred (600)--two thousand (2,000) vehicular trips per day),

    4.    Thirty (30) feet from a major thoroughfare (over two thousand (2,000) vehicular trips per day). (Prior gen. code § 8-96.18)