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Ordinance 2207 Page 13 — Decorative wall surfaces and landscape materials between sidewalks and buildings are encouraged. — Muted, modular materials, such as brick and stone, are particularly desirable. — Windows that reveal indoor amenities and activities are encouraged. — To the greatest extent possible, large expanses of blank walls or mirror glass shall be prohibited. — Covered walks or arcades are encouraged. • Each building should have a discernible base, a clear pattern of openings and/or surface features, a well-defined entry, and a clearly defined top roofline element. • All buildings shall include a minimum of three primary exterior materials. Noise Mitigation Buildings along Johnson Drive should be designed to minimize the effect of road noise on buildings and plazas. • Consider buffering major outdoor areas, such as balconies, terraces, and plazas, with design elements such as earth berms, evergreen plantings, or other acceptable landscape features. • Use wall materials with significant sound transmission ratings. • Sound walls adjacent to the street are prohibited. Massing, Scale, Form, and Details Buildings should relate to the area and each other in their massing and forms. Larger masses should be located at the centers of building compositions, with smaller forms stepping outwards and down. • Consider breaking very large buildings into modules or sub-parts to reduce perceived scale. • Vary the height of the roof to identify distinct elements. Building Profile Design buildings to step back and step down to help break up mass. Use landscape materials on and/or along building elevations to soften appearance and massing of structures from Johnson Drive. "Stepped down approaches" are especially appropriate for breaking up larger structures in excess of 100,000 square feet or those over two stories in height. • Express the position of each floor in the external skin design, using the following techniques: — Terracing, articulated structural elements, or changing building materials. — Belt courses, or other horizontal trim bands, of contrasting colors and/or materials. Pedestrian Scale Buildings should appear to be designed at a pedestrian scale. In general, this means using familiar forms and elements that can be interpreted in human dimensions. • On buildings over 50,000 square feet and more than two stories high, do not use wall planes more than 24 feet high without incorporating meaningful techniques to break up the perceived building mass. • Express facade components in ways that help establish building scale. Encourage compositions that emphasize floor lines or express rhythms and patterns of windows, columns, and other architectural features. Entrances Primary pedestrian entrances should be easily identifiable and attractive to pedestrians. • Design main entrances to be clearly identifiable as seen from primary driveways and drop- offs. — Entrances should be designed as contrasting areas on a building's facade.