A frontage street, either public or private, may be required for commercial and industrial developments adjacent to an arterial street, highway, or freeway. Frontage streets which are incapable of being extended a minimum length of six hundred feet shall not be approved unless a frontage street of less length is the only means of properly developing the property for the use for which it is zoned. Where a frontage street intersects with another street, the location of said intersection shall be as per the City Traffic Engineer.