22701.
For purposes of this part, the following terms have the following meanings: (a) “Disadvantaged community” means a disadvantaged community identified by the California Environmental Protection Agency pursuant to Section 39711 of the Health and Safety Code.
(b) “Green walls” means all forms of vegetated wall surfaces, including:
(1) Use of a trellis system to hold native vines and climbing plants that are rooted in the ground and grow vertically into the supporting structures attached to the walls.
(2) Living plant wall systems, vertical gardens, and modular green biowalls that contain plantings rooted in wall modules.
(c) “Green highways” means a section or sections of a highway that is now, or later may be, improved by green walls, plantings, or hardscaped solid barriers in or on at least one of the following portions of the right-of-way:
(1) A shoulder.
(2) A median.
(3) An overpass pillar.
(4) The community side of a sound wall, adjacent to a highway.
(d) “Low-income communities” are census tracts with median incomes at or below 80 percent of the statewide median income or with median household incomes at or below the threshold designated as low income by the Department of Housing and Community Development’s list of state income limits adopted pursuant to Section 50093 of the Health and Safety Code.
(e) “Plantings” means native lawns, trees, shrubs, flowers, moss, lichen, or other vegetation requiring reasonable maintenance.
(f) “Hardscaped solid barriers” means sound barrier walls or other solid structures made from nonliving material designed to mitigate sound or air pollution to adjacent communities from the highway and that include visually appealing design elements such as murals, decorative fencing, or adornment with rock, gravel, and recycled glass.
(g) “Reasonable maintenance” means the maintenance required to maintain vegetation in a healthy and attractive condition, including, but not limited to, watering, fertilizing, spraying, cultivating, pruning, cutting, mowing, replacing, weed control, washing, pest control, disease control, and litter removal. The fact that a plant may need less maintenance as it matures shall not be interpreted to mean that it does not require reasonable maintenance.
(h) “Urban area” means any of the following:
(1) The central portion of a city or a group of contiguous cities with a population of 50,000 or more, together with adjacent densely populated areas having a population density of at least 1,000 persons per square mile.
(2) A central city or cities and surrounding closely settled territory, as defined by the United States Department of Commerce Bureau of the Census in the Federal Register, Volume 39, Number 85, for Wednesday, May 1, 1974, at pages 15202 and 15203, and as periodically updated.