Landscape	Previous  Index  Next
	Trees may be used to provide the minimum level of shade (see section on Shade) and can also serve as a vertical physical separator from traffic (see section on Physical Separation From Traffic). However, plants are also important for softening an urban environment and creating a human scale. Landscape provides visual interest and an opportunity to strengthen or express a local or regional character. Many drought tolerant plants provide seasonal variety, color, texture, and interest, thereby adding to the quality of the pedestrian environment. When selecting plant materials, plants native to this region of Arizona or similar low-water use, desert plants should be used. There are numerous local sources of information for native plants (see box below). The understory to trees, the shrubs and groundcovers, should be free of thorny or spiky plants within 2 feet (0.6m) of the edge of the walkway. Plantings should not block the walkway or create visibility and/or security issues. In urban areas, pocket parks and landscaped patios and courtyards adjacent to the pedestrian area are encouraged. Low walls allow for visual access to the pedestrian route without allowing physical access. Resources Low Water-Use Plants for California and the Southwest by Carol Shuler Plants for Dry Climates by Mary Rose Duffield and Warren Jones Native Plants for Southwestern Landscapes by Judy Mielke Landscape Plants for Dry Regions by Warren Jones and Charles Sacamano The University of Arizona Cooperative Extension Service at 4341 East Broadway Road, Phoenix, AZ, 85040