California Codes, Business and Professions Code - BPC, Division 3 — Professions and Vocations Generally, Chapter 2 — Advertisers, Article 1 — General Provisions, Section 5216

(a) “Landscaped freeway” means a section or sections of a freeway that is now, or hereafter may be, improved by the planting at least on one side or on the median of the freeway right-of-way of lawns, trees, shrubs, flowers, or other ornamental vegetation requiring reasonable maintenance.

(b) Planting for the purpose of soil erosion control; traffic safety requirements, including light screening; reduction of fire hazards; covering soundwalls or fences; or traffic noise abatement shall not change the character of a freeway to a landscaped freeway.

(c) Notwithstanding subdivision (a), if an agreement to relocate advertising displays from within one area of a city or county to an area adjacent to a freeway right-of-way has been entered into between a city or county and the owner of an advertising display, then a “landscaped freeway” shall not include the median of a freeway right-of-way.